Resistance training for short sprints and maximum-speed sprints
- Young, Warren, Benton, Dean, Duthie, Grant, Pryor, John
- Authors: Young, Warren , Benton, Dean , Duthie, Grant , Pryor, John
- Date: 2001
- Type: Text , Journal article
- Relation: Strength and Conditioning Journal Vol. 23, no. 2 (2001), p. 7-13
- Full Text:
- Reviewed:
- Authors: Young, Warren , Benton, Dean , Duthie, Grant , Pryor, John
- Date: 2001
- Type: Text , Journal article
- Relation: Strength and Conditioning Journal Vol. 23, no. 2 (2001), p. 7-13
- Full Text:
- Reviewed:
Specificity of sprint and agility training methods
- Young, Warren, McDowell, Mark, Scarlett, Bentley
- Authors: Young, Warren , McDowell, Mark , Scarlett, Bentley
- Date: 2001
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 15, no. 3 (2001), p. 315-319
- Full Text:
- Reviewed:
- Description: The purpose of this study was to determine if straight sprint training transferred to agility performance tests that involved various change-of-direction complexities and if agility training transferred to straight sprinting speed. Thirty-six males were tested on a 30-m straight sprint and 6 agility tests with 2-5 changes of direction at various angles. The subjects participated in 2 training sessions per week for 6 weeks using 20-40-m straight sprints (speed) or 20-40-m change-of-direction sprints (3-5 changes of 100°) (agility). After the training period, the subjects were retested, and the speed training resulted in significant improvements (p < 0.05) in straight sprinting speed but limited gains in the agility tests. Generally, the more complex the agility task, the less the transfer from the speed training to the agility task. Conversely, the agility training resulted in significant improvements in the change-of-direction tests (p < 0.05) but no significant improvement (p > 0.05) in straight sprint performance. We concluded that straight speed and agility training methods are specific and produce limited transfer to the other. These findings have implications for the design of speed and agility training and testing protocols.
- Description: 2003003767
- Authors: Young, Warren , McDowell, Mark , Scarlett, Bentley
- Date: 2001
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 15, no. 3 (2001), p. 315-319
- Full Text:
- Reviewed:
- Description: The purpose of this study was to determine if straight sprint training transferred to agility performance tests that involved various change-of-direction complexities and if agility training transferred to straight sprinting speed. Thirty-six males were tested on a 30-m straight sprint and 6 agility tests with 2-5 changes of direction at various angles. The subjects participated in 2 training sessions per week for 6 weeks using 20-40-m straight sprints (speed) or 20-40-m change-of-direction sprints (3-5 changes of 100°) (agility). After the training period, the subjects were retested, and the speed training resulted in significant improvements (p < 0.05) in straight sprinting speed but limited gains in the agility tests. Generally, the more complex the agility task, the less the transfer from the speed training to the agility task. Conversely, the agility training resulted in significant improvements in the change-of-direction tests (p < 0.05) but no significant improvement (p > 0.05) in straight sprint performance. We concluded that straight speed and agility training methods are specific and produce limited transfer to the other. These findings have implications for the design of speed and agility training and testing protocols.
- Description: 2003003767
Should static stretching be used during a warm-up for strength and power activities?
- Authors: Young, Warren , Behm, David
- Date: 2002
- Type: Text , Journal article
- Relation: Strength and Conditioning Journal Vol. 24, no. 6 (2002), p. 33-37
- Full Text:
- Reviewed:
- Description: 2003000236
- Authors: Young, Warren , Behm, David
- Date: 2002
- Type: Text , Journal article
- Relation: Strength and Conditioning Journal Vol. 24, no. 6 (2002), p. 33-37
- Full Text:
- Reviewed:
- Description: 2003000236
Long term retention of safe diving skills
- Blitvich, Jennifer, McElroy, G. Keith, Blanksby, Brian, Parker, H. E.
- Authors: Blitvich, Jennifer , McElroy, G. Keith , Blanksby, Brian , Parker, H. E.
- Date: 2003
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 6, no. 3 (2003), p. 348-354
- Full Text:
- Reviewed:
- Description: This short report describes a 20-month follow-up of safe diving skills, extending the 8-month retention period previously published in this journal. Thirty-four recreational swimmers with poor diving skills were evaluated before and immediately after a diving skills intervention program. Twenty-two returned for the eight-month follow-up evaluation and 16 returned 20 months post. As with the earlier study, Treadwater, Deck, Block and Running dives were video-recorded, and maximum depth, distance, velocity, entry angle and flight distance were compared. Underwater hand and arm positions were examined. Pre-intervention, a breaststroke arm action before maximum depth occurred in 18% of all dives and 38% of Treadwater dives. This was eliminated post-intervention, improving head protection. The Treadwater dive elicited the greatest mean maximum depth, and ANOVA showed depth for this entry decreased (improved) following intervention and remained shallower at the eight-month and 20-month post follow-ups. The Block dive also became shallower following intervention while the Deck dive remained unchanged. As seven 10-minute skills sessions resulted in shallower dives with safer hand and arm positions, and these skills were retained over a 600 day non-practice period, it is reliable to consider that the inclusion of safe diving skills in learn-to-swim programs can provide a diving spinal cord injury prevention strategy.
- Description: C1
- Description: 2003000626
Relationship between a modified Thomas test and leg range of motion in Australian rules football kicking
- Young, Warren, Clothier, Peter, Otago, Leonie, Bruce, Lyndell, Liddell, David
- Authors: Young, Warren , Clothier, Peter , Otago, Leonie , Bruce, Lyndell , Liddell, David
- Date: 2003
- Type: Text , Journal article
- Relation: Journal of Sport Rehabilitation Vol. 12, no. 4 (2003), p. 343-350
- Full Text:
- Reviewed:
- Description: Context: Flexibility tests are sometimes thought to be related to range of motion in dynamic activities, but such a relationship remains to be determined. Objective: To determine the correlation between flexibility and hip and knee angles in Australian football kicking. Design: Correlation. Setting: Biomechanics laboratory. Participants: 16 Australian Rules football players. Main Outcome Measures: Hip and knee angles of the preferred kicking leg in a relaxed position were determined with a modified Thomas test. Maximum hip extension, the knee-flexion angle in this position, the maximum knee-flexion angle, and the hip angle at this position during the swing phase of maximum-effort drop-punt kicks were determined. Results: Significant correlations were found between hip flexibility and maximum hip extension (r =.65, P < .01) and hip angle at the maximum knee-flexion angle (r = .70, P < .01). Conclusions: The data indicate a moderate association between hip flexibility and hip angles during kicking.
- Description: C1
- Description: 2003000537
- Authors: Young, Warren , Clothier, Peter , Otago, Leonie , Bruce, Lyndell , Liddell, David
- Date: 2003
- Type: Text , Journal article
- Relation: Journal of Sport Rehabilitation Vol. 12, no. 4 (2003), p. 343-350
- Full Text:
- Reviewed:
- Description: Context: Flexibility tests are sometimes thought to be related to range of motion in dynamic activities, but such a relationship remains to be determined. Objective: To determine the correlation between flexibility and hip and knee angles in Australian football kicking. Design: Correlation. Setting: Biomechanics laboratory. Participants: 16 Australian Rules football players. Main Outcome Measures: Hip and knee angles of the preferred kicking leg in a relaxed position were determined with a modified Thomas test. Maximum hip extension, the knee-flexion angle in this position, the maximum knee-flexion angle, and the hip angle at this position during the swing phase of maximum-effort drop-punt kicks were determined. Results: Significant correlations were found between hip flexibility and maximum hip extension (r =.65, P < .01) and hip angle at the maximum knee-flexion angle (r = .70, P < .01). Conclusions: The data indicate a moderate association between hip flexibility and hip angles during kicking.
- Description: C1
- Description: 2003000537
Retention of safe diving skills
- Blitvich, Jennifer, McElroy, G. Keith, Blanksby, Brian, Parker, H. E.
- Authors: Blitvich, Jennifer , McElroy, G. Keith , Blanksby, Brian , Parker, H. E.
- Date: 2003
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 6, no. 2 (2003), p. 155-165
- Full Text:
- Reviewed:
- Description: This study investigated diving skill maintenance over an eight-month retention period following an intervention program. Thirty-four recreational swimmers with poor diving skills were measured before and immediately after a diving skills intervention program. Twenty-two returned for follow-up evaluation. Treadwater, Deck and Block dives were video-recorded, and maximum depth, distance, velocity, entry angle and flight distance were compared. Underwater hand and arm positions were examined. Pre-intervention, a breaststroke arm action before maximum depth occurred in 18% of all dives and 38% of Treadwater dives. This was eliminated post-intervention, improving head protection. The Treadwater dive elicited the greatest mean maximum depth, and ANOVA showed depth for this entry decreased (improved) following intervention and remained shallower at follow-up. Deck and Block dives also became shallower following intervention. As seven 10-minute skills sessions resulted in shallower dives with safer hand and arm positions, including safe diving skills in learn-to-swim programs can provide a diving spinal cord injury prevention strategy.
- Description: C1
- Description: 2003000629
- Authors: Blitvich, Jennifer , McElroy, G. Keith , Blanksby, Brian , Parker, H. E.
- Date: 2003
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 6, no. 2 (2003), p. 155-165
- Full Text:
- Reviewed:
- Description: This study investigated diving skill maintenance over an eight-month retention period following an intervention program. Thirty-four recreational swimmers with poor diving skills were measured before and immediately after a diving skills intervention program. Twenty-two returned for follow-up evaluation. Treadwater, Deck and Block dives were video-recorded, and maximum depth, distance, velocity, entry angle and flight distance were compared. Underwater hand and arm positions were examined. Pre-intervention, a breaststroke arm action before maximum depth occurred in 18% of all dives and 38% of Treadwater dives. This was eliminated post-intervention, improving head protection. The Treadwater dive elicited the greatest mean maximum depth, and ANOVA showed depth for this entry decreased (improved) following intervention and remained shallower at follow-up. Deck and Block dives also became shallower following intervention. As seven 10-minute skills sessions resulted in shallower dives with safer hand and arm positions, including safe diving skills in learn-to-swim programs can provide a diving spinal cord injury prevention strategy.
- Description: C1
- Description: 2003000629
Acute effects of static stretching on hip flexor and quadriceps flexibility, range of motion and foot speed in kicking a football
- Young, Warren, Clothier, Peter, Otago, Leonie, Bruce, Lyndell, Liddell, David
- Authors: Young, Warren , Clothier, Peter , Otago, Leonie , Bruce, Lyndell , Liddell, David
- Date: 2004
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 7, no. 1 (Mar 2004), p. 23-31
- Full Text:
- Reviewed:
- Description: The purpose of this research was to determine the effect of static stretching in a warm-up on hip flexor and quadriceps flexibility as measured by a modified Thomas test and on range of motion (ROM) of the leg and foot speed at impact in kicking a football with maximum effort. Sixteen Australian Rules (AR) footballers performed two different warm-ups on different days. One warm-up involved five minutes of sub-maximum running followed by seven practice kicks, while the other also included 4.5 minutes static stretching of the hip flexors and quadriceps after the running. A modified Thomas test was conduced before and after each warm-up. Players performed maximum effort drop punt kicks into a net while being videotaped to determine the ROM of the kicking leg and foot speed at impact with the ball. There were no significant changes in flexibility (p>0.05) as a result of either warm-up and there were no significant differences between the warm-ups in the kicking variables (p>0.05). It was concluded that the Thomas test may not have been sensitive to possible acute changes in flexibility from the warm-ups, and that stretching had no influence on kicking ROM or foot speed, possibly because of the complexity of the kicking skill.
- Description: C1
- Description: 2003000977
- Authors: Young, Warren , Clothier, Peter , Otago, Leonie , Bruce, Lyndell , Liddell, David
- Date: 2004
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 7, no. 1 (Mar 2004), p. 23-31
- Full Text:
- Reviewed:
- Description: The purpose of this research was to determine the effect of static stretching in a warm-up on hip flexor and quadriceps flexibility as measured by a modified Thomas test and on range of motion (ROM) of the leg and foot speed at impact in kicking a football with maximum effort. Sixteen Australian Rules (AR) footballers performed two different warm-ups on different days. One warm-up involved five minutes of sub-maximum running followed by seven practice kicks, while the other also included 4.5 minutes static stretching of the hip flexors and quadriceps after the running. A modified Thomas test was conduced before and after each warm-up. Players performed maximum effort drop punt kicks into a net while being videotaped to determine the ROM of the kicking leg and foot speed at impact with the ball. There were no significant changes in flexibility (p>0.05) as a result of either warm-up and there were no significant differences between the warm-ups in the kicking variables (p>0.05). It was concluded that the Thomas test may not have been sensitive to possible acute changes in flexibility from the warm-ups, and that stretching had no influence on kicking ROM or foot speed, possibly because of the complexity of the kicking skill.
- Description: C1
- Description: 2003000977
Selection of key trade tasks for detailed observation : Report No.1
- Stacy, R, Payne, Warren, Harvey, Jack
- Authors: Stacy, R , Payne, Warren , Harvey, Jack
- Date: 2004
- Type: Text , Report
- Relation: Defence Physical Employment Standards Project: Infantry and Airfield Defence Guards
- Full Text:
- Reviewed:
- Description: The aim of this work package was to identify a set of key job performance tasks, which were considered to represent the critical physical performance requirements and risks relevant to Infantry and Airfield Defence Guards, for more intensive examination. A total of 34 tasks were identified for further detailed observation and analysis in the next work package (WBS: 1.1.2.2). These tasks were selected using a process of analysis which was consistent with processes used in previously reported studies, such as Rayson (1998). The objectives of this analysis process were to identify those tasks that are: 1. Most physically demanding and/or impacting on cognitive function; 2. Common to all the combat arms; 3. Specific to a particular combat arm, trade or sub-trades; and 4. Considered to involve higher levels of risk of injury. The method followed a three-step process, including: 1. A preliminary review of existing ADF task analysis survey data, competency statements and sub-trade manuals; 2. A questionnaire to subject matter experts; and 3. A series of one-day workshops at Puckapunyal. The outcome of this analysis process was a list of 34 tasks that represented a combination of physically demanding tasks, common tasks and high-risk tasks. For the purposes of detailed task observation, the tasks were provisionally allocated, 20 to Infantry and 15 to Airfield Defence Guards. One duplicate task appears in both lists.
- Authors: Stacy, R , Payne, Warren , Harvey, Jack
- Date: 2004
- Type: Text , Report
- Relation: Defence Physical Employment Standards Project: Infantry and Airfield Defence Guards
- Full Text:
- Reviewed:
- Description: The aim of this work package was to identify a set of key job performance tasks, which were considered to represent the critical physical performance requirements and risks relevant to Infantry and Airfield Defence Guards, for more intensive examination. A total of 34 tasks were identified for further detailed observation and analysis in the next work package (WBS: 1.1.2.2). These tasks were selected using a process of analysis which was consistent with processes used in previously reported studies, such as Rayson (1998). The objectives of this analysis process were to identify those tasks that are: 1. Most physically demanding and/or impacting on cognitive function; 2. Common to all the combat arms; 3. Specific to a particular combat arm, trade or sub-trades; and 4. Considered to involve higher levels of risk of injury. The method followed a three-step process, including: 1. A preliminary review of existing ADF task analysis survey data, competency statements and sub-trade manuals; 2. A questionnaire to subject matter experts; and 3. A series of one-day workshops at Puckapunyal. The outcome of this analysis process was a list of 34 tasks that represented a combination of physically demanding tasks, common tasks and high-risk tasks. For the purposes of detailed task observation, the tasks were provisionally allocated, 20 to Infantry and 15 to Airfield Defence Guards. One duplicate task appears in both lists.
Immediate re-hydration post-exercise is not coincident with raised mean arterial pressure over a 30-minute observation period
- Kay, Bartholomew, O'Brien, Brendan, Gill, Nicholas
- Authors: Kay, Bartholomew , O'Brien, Brendan , Gill, Nicholas
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 4, no. 4 (Dec 2005), p. 422-429
- Full Text:
- Reviewed:
- Description: This investigation assessed the effects of immediate or delayed re-hydration post-exercise, on mean arterial blood pressure ( MAP) and on blood plasma volume (PV) expansion post-exercise. It was hypothesised that fluid ingestion would raise MAP and attenuate PV expansion. On two occasions separated by seven days, eight males ( age 20.4 +/- 1.7 years, mass 79 +/- 5 kg [ means +/- SD]; VO2 max 48 +/- 11 mL center dot kg(-1) center dot minute(-1), [mean +/- SE]) cycled in the heat (35 degrees C, 50% relative humidity) at a power output associated with 50% VO2 max, until 1.0kg body mass was lost. 1L water was given either immediately thereafter, or two hours post-exercise by random assignment. On both occasions, MAP was calculated every five minutes for a period of 30-minutes post-exercise, and change in PV was calculated 24-hours post-exercise. Repeated measures ANOVA for MAP results suggested a low probability of a treatment effect ( p = 0.655), a high probability of a time effect ( p = 0.006), and a moderately high probability of a time x treatment interaction ( p = 0.076); MAP tended to be lower when fluid had been consumed. PV expansions 24-hours post-exercise were not significant changes with respect to zero, and were not significantly different by treatment condition. In conclusion: ( a) The exercise was not sufficient to elicit significant PV expansions; thus, we were unable to determine the effects of the timing of post-exercise re-hydration on PV expansion. (b) The hypothesis regarding MAP in response to drinking was not supported, rather there was a 92% probability that the inverse affect occurs.
- Description: C1
- Description: 2003002930
- Authors: Kay, Bartholomew , O'Brien, Brendan , Gill, Nicholas
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 4, no. 4 (Dec 2005), p. 422-429
- Full Text:
- Reviewed:
- Description: This investigation assessed the effects of immediate or delayed re-hydration post-exercise, on mean arterial blood pressure ( MAP) and on blood plasma volume (PV) expansion post-exercise. It was hypothesised that fluid ingestion would raise MAP and attenuate PV expansion. On two occasions separated by seven days, eight males ( age 20.4 +/- 1.7 years, mass 79 +/- 5 kg [ means +/- SD]; VO2 max 48 +/- 11 mL center dot kg(-1) center dot minute(-1), [mean +/- SE]) cycled in the heat (35 degrees C, 50% relative humidity) at a power output associated with 50% VO2 max, until 1.0kg body mass was lost. 1L water was given either immediately thereafter, or two hours post-exercise by random assignment. On both occasions, MAP was calculated every five minutes for a period of 30-minutes post-exercise, and change in PV was calculated 24-hours post-exercise. Repeated measures ANOVA for MAP results suggested a low probability of a treatment effect ( p = 0.655), a high probability of a time effect ( p = 0.006), and a moderately high probability of a time x treatment interaction ( p = 0.076); MAP tended to be lower when fluid had been consumed. PV expansions 24-hours post-exercise were not significant changes with respect to zero, and were not significantly different by treatment condition. In conclusion: ( a) The exercise was not sufficient to elicit significant PV expansions; thus, we were unable to determine the effects of the timing of post-exercise re-hydration on PV expansion. (b) The hypothesis regarding MAP in response to drinking was not supported, rather there was a 92% probability that the inverse affect occurs.
- Description: C1
- Description: 2003002930
Physiological and anthropometric characteristics of starters and non-starters and playing positions in elite Australian Rules football : A case study
- Young, Warren, Newton, Robert, Doyle, Tim, Chapman, Dale, Cormack, Stuart, Stewart, Glenn, Dawson, Brian
- Authors: Young, Warren , Newton, Robert , Doyle, Tim , Chapman, Dale , Cormack, Stuart , Stewart, Glenn , Dawson, Brian
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 8, no. 3 (Sep 2005), p. 333-345
- Full Text:
- Reviewed:
- Description: A purpose of this study was to determine if pre-season anthropometric and physiological measures were significantly different for the players from one Australian Football League (AFL) club selected to play in the first game of the season compared to the players not selected. Another purpose was to compare fitness test results for defenders, forwards and mid-fielders in the same AFL club. Thirty-four players were tested for isolated quadriceps and hamstrings strength, leg extensor muscle strength and power, upper body strength, sprinting speed, vertical jump (VJ), endurance, skinfolds and hamstring flexibility. The starters who were selected to play the first game were a significantly older and more experienced playing group, and were significantly better (p < 0.05) in measures of leg power, sprinting speed and the distance covered in the Yo Yo intermittent recovery test compared to the non-starters. Although there were trends for the superiority of the starters, the differences in lower and upper body strength, VJ and predicted VO(2)max were nonsignificant. The forwards generally produced the worst fitness scores of the playing positions with the midfielders having significantly lower skinfolds and the defenders possessing better hamstring strength and VJ compared to the forwards. It was concluded that some fitness qualities can differentiate between starters and non-starters, at least in one AFL club. Comparisons of playing positions and the development of fitness norms for AFL players require further research.
- Description: C1
- Description: 2003001187
- Authors: Young, Warren , Newton, Robert , Doyle, Tim , Chapman, Dale , Cormack, Stuart , Stewart, Glenn , Dawson, Brian
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 8, no. 3 (Sep 2005), p. 333-345
- Full Text:
- Reviewed:
- Description: A purpose of this study was to determine if pre-season anthropometric and physiological measures were significantly different for the players from one Australian Football League (AFL) club selected to play in the first game of the season compared to the players not selected. Another purpose was to compare fitness test results for defenders, forwards and mid-fielders in the same AFL club. Thirty-four players were tested for isolated quadriceps and hamstrings strength, leg extensor muscle strength and power, upper body strength, sprinting speed, vertical jump (VJ), endurance, skinfolds and hamstring flexibility. The starters who were selected to play the first game were a significantly older and more experienced playing group, and were significantly better (p < 0.05) in measures of leg power, sprinting speed and the distance covered in the Yo Yo intermittent recovery test compared to the non-starters. Although there were trends for the superiority of the starters, the differences in lower and upper body strength, VJ and predicted VO(2)max were nonsignificant. The forwards generally produced the worst fitness scores of the playing positions with the midfielders having significantly lower skinfolds and the defenders possessing better hamstring strength and VJ compared to the forwards. It was concluded that some fitness qualities can differentiate between starters and non-starters, at least in one AFL club. Comparisons of playing positions and the development of fitness norms for AFL players require further research.
- Description: C1
- Description: 2003001187
Plasma volume expansion 24-hours post-exercise: Effect of doubling the volume of replacement fluid
- Kay, Bartholomew, O'Brien, Brendan, Gill, Nicholas
- Authors: Kay, Bartholomew , O'Brien, Brendan , Gill, Nicholas
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 4, no. 2 (2005), p. 179-184
- Full Text:
- Reviewed:
- Description: The effects of two volumes (1.5 L or 3.0 L) of commercially available electrolyte beverage (1.44 mM·L-1 Na+) taken during a 24-hour recovery period post-exercise, on plasma volume (PV) expansion 24-hours post-exercise were assessed. A simple random-order crossover research design was used. Subjects (n = 9 males: age 21 ± 4 years, body mass 80.0 ± 9.0 kg, peak incremental 60-second cycling power output 297 ± 45 W [means ± SD]) completed an identical exercise protocol conducted in hot ambient conditions (35°C, 50% relative humidity) on two occasions; separated by 7-days. On each occasion, subjects received a different volume of 24-hour fluid intake (commercial beverage) in random order. In each case, the fluid was taken in five equal aliquots over 24-hours. PV expansions 24-hours post-exercise were estimated from changes in haemoglobin and haematocrit. Dependent t-testing revealed no significant differences in PV expansions between trials, however a significant expansion with respect to zero was identified in the 3.0 L trial only. Specifically, PV expansions (%) were; 1.5 L trial: (mean ± SE) 2.3 ± 2.0 (not significant with respect to zero), 3.0 L trial: 5.0 ± 2.0 (p < 0.05, with respect to zero). Under the conditions imposed in the current study, ingesting the greater volume of the beverage lead to larger mean PV expansion.
- Description: C1
- Description: 2003001182
- Authors: Kay, Bartholomew , O'Brien, Brendan , Gill, Nicholas
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 4, no. 2 (2005), p. 179-184
- Full Text:
- Reviewed:
- Description: The effects of two volumes (1.5 L or 3.0 L) of commercially available electrolyte beverage (1.44 mM·L-1 Na+) taken during a 24-hour recovery period post-exercise, on plasma volume (PV) expansion 24-hours post-exercise were assessed. A simple random-order crossover research design was used. Subjects (n = 9 males: age 21 ± 4 years, body mass 80.0 ± 9.0 kg, peak incremental 60-second cycling power output 297 ± 45 W [means ± SD]) completed an identical exercise protocol conducted in hot ambient conditions (35°C, 50% relative humidity) on two occasions; separated by 7-days. On each occasion, subjects received a different volume of 24-hour fluid intake (commercial beverage) in random order. In each case, the fluid was taken in five equal aliquots over 24-hours. PV expansions 24-hours post-exercise were estimated from changes in haemoglobin and haematocrit. Dependent t-testing revealed no significant differences in PV expansions between trials, however a significant expansion with respect to zero was identified in the 3.0 L trial only. Specifically, PV expansions (%) were; 1.5 L trial: (mean ± SE) 2.3 ± 2.0 (not significant with respect to zero), 3.0 L trial: 5.0 ± 2.0 (p < 0.05, with respect to zero). Under the conditions imposed in the current study, ingesting the greater volume of the beverage lead to larger mean PV expansion.
- Description: C1
- Description: 2003001182
The effectiveness of a squash eyewear promotion strategy
- Eime, Rochelle, Finch, Caroline, Wolfe, R., Owen, Neville, McCarty, Catherine
- Authors: Eime, Rochelle , Finch, Caroline , Wolfe, R. , Owen, Neville , McCarty, Catherine
- Date: 2005
- Type: Text , Journal article
- Relation: Britsh Journal of Sports Medicine Vol. 39, no. (2005), p. 681-684
- Full Text:
- Reviewed:
- Description: Objective: To evaluate the protective eyewear promotion (PEP) project, which was a comprehensive educational strategy to increase the use of appropriate protective eyewear by squash players. Methods: An ecological study design was used. Four squash venues in one playing association were randomly chosen to receive PEP and four in another association maintained usual practice and hence formed a control group. The primary evaluation measurements were surveys of cross sectional samples of players carried out before and after the intervention. The surveys investigated players’ knowledge, behaviours, and attitudes associated with the use of protective eyewear. The survey carried out after the intervention also determined players’ exposure to PEP. Univariate and multivariate analyses were undertaken to describe differences at PEP venues from pre- to post-intervention and to compare these with the control venues. Results: The PEP players had 2.4 times the odds (95% confidence interval, 1.3 to 4.2) of wearing appropriate eyewear compared with control group players post-intervention, relative to the groups’ preintervention baselines. Components of PEP, such as stickers and posters and the availability and prominent positioning of the project eyewear, were found to contribute to players adopting favourable eyewear behaviours. Conclusions: Components of the PEP intervention were shown to be effective. The true success will be the sustainability and dissemination of the project, favourable eyewear behaviours, and evidence of the prevention of eye injuries long into the future.
- Description: C1
- Description: 2003005015
- Authors: Eime, Rochelle , Finch, Caroline , Wolfe, R. , Owen, Neville , McCarty, Catherine
- Date: 2005
- Type: Text , Journal article
- Relation: Britsh Journal of Sports Medicine Vol. 39, no. (2005), p. 681-684
- Full Text:
- Reviewed:
- Description: Objective: To evaluate the protective eyewear promotion (PEP) project, which was a comprehensive educational strategy to increase the use of appropriate protective eyewear by squash players. Methods: An ecological study design was used. Four squash venues in one playing association were randomly chosen to receive PEP and four in another association maintained usual practice and hence formed a control group. The primary evaluation measurements were surveys of cross sectional samples of players carried out before and after the intervention. The surveys investigated players’ knowledge, behaviours, and attitudes associated with the use of protective eyewear. The survey carried out after the intervention also determined players’ exposure to PEP. Univariate and multivariate analyses were undertaken to describe differences at PEP venues from pre- to post-intervention and to compare these with the control venues. Results: The PEP players had 2.4 times the odds (95% confidence interval, 1.3 to 4.2) of wearing appropriate eyewear compared with control group players post-intervention, relative to the groups’ preintervention baselines. Components of PEP, such as stickers and posters and the availability and prominent positioning of the project eyewear, were found to contribute to players adopting favourable eyewear behaviours. Conclusions: Components of the PEP intervention were shown to be effective. The true success will be the sustainability and dissemination of the project, favourable eyewear behaviours, and evidence of the prevention of eye injuries long into the future.
- Description: C1
- Description: 2003005015
Trunk muscle electromyographic activity with unstable and unilateral exercises
- Behm, David, Leonard, Allison, Young, Warren, Bonsey, Andrew, MacKinnon, Scott N.
- Authors: Behm, David , Leonard, Allison , Young, Warren , Bonsey, Andrew , MacKinnon, Scott N.
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 19, no. 1 (2005), p. 193-201
- Full Text:
- Reviewed:
- Description: The purpose of this cross-sectional study was to evaluate the effect of unstable and unilateral resistance exercises on trunk muscle activation. Eleven subjects (6 men and 5 women) between 20 and 45 years of age participated. Six trunk exercises, as well as unilateral and bilateral shoulder and chest presses against resistance, were performed on stable (bench) and unstable (Swiss ball) bases. Electromyographic activity of the upper lumbar, lumbosacral erector spinae, and lower-abdominal muscles were monitored. Instability generated greater activation of the lower-abdominal stabilizer musculature (27.9%) with the trunk exercises and all trunk stabilizers (37.7-54.3%) with the chest press. There was no effect of instability on the shoulder press. Unilateral shoulder press produced greater activation of the back stabilizers, and unilateral chest press resulted in higher activation of all trunk stabilizers, when compared with bilateral presses. Regardless of stability, the superman exercise was the most effective trunk-stabilizer exercise for back-stabilizer activation, whereas the side bridge was the optimal exercise for lower-abdominal muscle activation. Thus, the most effective means for trunk strengthening should involve back or abdominal exercises with unstable bases. Furthermore, trunk strengthening can also occur when performing resistance exercises for the limbs, if the exercises are performed unilaterally. © 2005 National Strength & Conditioning Association.
- Description: C1
- Description: 2003001184
- Authors: Behm, David , Leonard, Allison , Young, Warren , Bonsey, Andrew , MacKinnon, Scott N.
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 19, no. 1 (2005), p. 193-201
- Full Text:
- Reviewed:
- Description: The purpose of this cross-sectional study was to evaluate the effect of unstable and unilateral resistance exercises on trunk muscle activation. Eleven subjects (6 men and 5 women) between 20 and 45 years of age participated. Six trunk exercises, as well as unilateral and bilateral shoulder and chest presses against resistance, were performed on stable (bench) and unstable (Swiss ball) bases. Electromyographic activity of the upper lumbar, lumbosacral erector spinae, and lower-abdominal muscles were monitored. Instability generated greater activation of the lower-abdominal stabilizer musculature (27.9%) with the trunk exercises and all trunk stabilizers (37.7-54.3%) with the chest press. There was no effect of instability on the shoulder press. Unilateral shoulder press produced greater activation of the back stabilizers, and unilateral chest press resulted in higher activation of all trunk stabilizers, when compared with bilateral presses. Regardless of stability, the superman exercise was the most effective trunk-stabilizer exercise for back-stabilizer activation, whereas the side bridge was the optimal exercise for lower-abdominal muscle activation. Thus, the most effective means for trunk strengthening should involve back or abdominal exercises with unstable bases. Furthermore, trunk strengthening can also occur when performing resistance exercises for the limbs, if the exercises are performed unilaterally. © 2005 National Strength & Conditioning Association.
- Description: C1
- Description: 2003001184
A comparison of the effects of fatigue on subjective and objective assessment of situation awareness in cycling
- Authors: Knez, Wade , Ham, Daniel
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 5, no. 1 (2006), p. 89-96
- Full Text:
- Reviewed:
- Description: Maximal effort on a 30 km Time Trial (TT30) was examined to assess whether it would elicit changes in objective and subjective tests of the participants' perception of the environment and their ability to anticipate future occurrences (situation awareness; SA) and to determine the effect of post-exercise recovery on SA. Nine experienced (5.22 ± 2.77 years) road cyclists had their objective and subjective levels of SA assessed prior to and at the completion of two TT30. The participants' results were compared to measurements of maximal oxygen uptake (VO2max), peak power output (PPO), age and years of competitive cycle racing experience. Fatigue resulting from maximal effort on a TT30 produced significant changes in both the objective and subjective test of SA. Effect sizes of 0.93 and 0.99 indicated that the first and second TT30 were likely or almost certain to have a beneficial effect on the objective assessment of SA. However, the effect sizes of 0.97 and 0.95 relating to the subjective assessment of cognitive performance on the first and second TT30 showed that it was very likely the participants' had an increased difficulty in maintaining SA. A recovery period of up to three minutes post TT30 had no effect on SA. Changes in SA had no relationship with measurements of VO2max, peak power output (PPO), age and years of competitive cycle racing experience. The findings suggest that within a laboratory environment, participants consistently underestimate their ability to make accurate assessments of their cycling environment compared to objective measures of their SA. ©Journal of Sports Science and Medicine (2006).
- Description: C1
- Authors: Knez, Wade , Ham, Daniel
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 5, no. 1 (2006), p. 89-96
- Full Text:
- Reviewed:
- Description: Maximal effort on a 30 km Time Trial (TT30) was examined to assess whether it would elicit changes in objective and subjective tests of the participants' perception of the environment and their ability to anticipate future occurrences (situation awareness; SA) and to determine the effect of post-exercise recovery on SA. Nine experienced (5.22 ± 2.77 years) road cyclists had their objective and subjective levels of SA assessed prior to and at the completion of two TT30. The participants' results were compared to measurements of maximal oxygen uptake (VO2max), peak power output (PPO), age and years of competitive cycle racing experience. Fatigue resulting from maximal effort on a TT30 produced significant changes in both the objective and subjective test of SA. Effect sizes of 0.93 and 0.99 indicated that the first and second TT30 were likely or almost certain to have a beneficial effect on the objective assessment of SA. However, the effect sizes of 0.97 and 0.95 relating to the subjective assessment of cognitive performance on the first and second TT30 showed that it was very likely the participants' had an increased difficulty in maintaining SA. A recovery period of up to three minutes post TT30 had no effect on SA. Changes in SA had no relationship with measurements of VO2max, peak power output (PPO), age and years of competitive cycle racing experience. The findings suggest that within a laboratory environment, participants consistently underestimate their ability to make accurate assessments of their cycling environment compared to objective measures of their SA. ©Journal of Sports Science and Medicine (2006).
- Description: C1
A review of agility : Practical applications for strength and conditioning
- Young, Warren, Farrow, Damian
- Authors: Young, Warren , Farrow, Damian
- Date: 2006
- Type: Text , Journal article
- Relation: Strength and Conditioning Journal Vol. 28, no. 5 (2006), p. 24-29
- Full Text:
- Reviewed:
- Description: Agility is an important component of many sports but has not been extensively researched. The various components that contribute to agility performance are discussed and training guidelines are provided. There appears to be limited transfer to agility performance from straight sprint training as well as from general strength training. The principle of training specificity is emphasized to achieve maximum transfer to on-field performance.
- Description: C1
- Description: 2003002120
- Authors: Young, Warren , Farrow, Damian
- Date: 2006
- Type: Text , Journal article
- Relation: Strength and Conditioning Journal Vol. 28, no. 5 (2006), p. 24-29
- Full Text:
- Reviewed:
- Description: Agility is an important component of many sports but has not been extensively researched. The various components that contribute to agility performance are discussed and training guidelines are provided. There appears to be limited transfer to agility performance from straight sprint training as well as from general strength training. The principle of training specificity is emphasized to achieve maximum transfer to on-field performance.
- Description: C1
- Description: 2003002120
Agility literature review : Classifications, training and testing
- Sheppard, Jeremy, Young, Warren
- Authors: Sheppard, Jeremy , Young, Warren
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Sports Sciences Vol. 24, no. 9 (Sep 2006), p. 919-932
- Full Text:
- Reviewed:
- Description: At present, no agreement on a precise definition of agility within the sports science community exists. The term is applied to a broad range of sport contexts, but with such great inconsistency, it further complicates our understanding of what trainable components may enhance agility. A new definition of agility is proposed: "a rapid whole-body movement with change of velocity or direction in response to a stimulus". Agility has relationships with trainable physical qualities such as strength, power and technique, as well as cognitive components such as visual-scanning techniques, visual-scanning speed and anticipation. Agility testing is generally confined to tests of physical components such as change of direction speed, or cognitive components such as anticipation and pattern recognition. New tests of agility that combine physical and cognitive measures are encouraged.
- Description: C1
- Description: 2003002129
- Authors: Sheppard, Jeremy , Young, Warren
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Sports Sciences Vol. 24, no. 9 (Sep 2006), p. 919-932
- Full Text:
- Reviewed:
- Description: At present, no agreement on a precise definition of agility within the sports science community exists. The term is applied to a broad range of sport contexts, but with such great inconsistency, it further complicates our understanding of what trainable components may enhance agility. A new definition of agility is proposed: "a rapid whole-body movement with change of velocity or direction in response to a stimulus". Agility has relationships with trainable physical qualities such as strength, power and technique, as well as cognitive components such as visual-scanning techniques, visual-scanning speed and anticipation. Agility testing is generally confined to tests of physical components such as change of direction speed, or cognitive components such as anticipation and pattern recognition. New tests of agility that combine physical and cognitive measures are encouraged.
- Description: C1
- Description: 2003002129
An evaluation of a new test of reactive agility and its relationship to sprint speed and change of direction speed
- Sheppard, Jeremy, Young, Warren, Doyle, Tim, Sheppard, T. A., Newton, Robert
- Authors: Sheppard, Jeremy , Young, Warren , Doyle, Tim , Sheppard, T. A. , Newton, Robert
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 9, no. 4 (2006), p. 342-349
- Full Text:
- Reviewed:
- Description: The purpose of this study was to evaluate the reliability and validity of a new test of agility, the reactive agility test (RAT), which included anticipation and decision-making components in response to the movements of a tester. Thirty-eight Australian football players took part in the study, categorized into either a higher performance group (HPG) (n = 24) or lower performance group (LPG) (n = 14) based on playing level from the previous season. All participants undertook testing of a 10 m straight sprint (10 mSS), a 8-9 m change of direction speed test (CODST), and the RAT. Test-retest and inter-tester reliability testing measures were conducted with the LPG. The intra-class correlation (ICC) of the RAT was 0.870, with no significant (p < 0.05) difference between the test results obtained on the first and second test sessions using a t-test. A dependent samples t-test revealed no significant (p < 0.05) difference between the test results of two different testers with the same population. The HPG were significantly (p = 0.001) superior to those of the LPG on the RAT, with no differences observed on any other variable. The RAT is an acceptably reliable test when considering both test-retest reliability, as well as inter-rater reliability. In addition, the test was valid in distinguishing between players of differing performance level in Australian football, while the 10 mSS and CODST were not. This result suggests that traditional closed skill sprint and sprint with direction change tests may not adequately distinguish between players of different levels of competition in Australian football. © 2006 Sports Medicine Australia.
- Description: C1
- Description: 2003002132
- Authors: Sheppard, Jeremy , Young, Warren , Doyle, Tim , Sheppard, T. A. , Newton, Robert
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 9, no. 4 (2006), p. 342-349
- Full Text:
- Reviewed:
- Description: The purpose of this study was to evaluate the reliability and validity of a new test of agility, the reactive agility test (RAT), which included anticipation and decision-making components in response to the movements of a tester. Thirty-eight Australian football players took part in the study, categorized into either a higher performance group (HPG) (n = 24) or lower performance group (LPG) (n = 14) based on playing level from the previous season. All participants undertook testing of a 10 m straight sprint (10 mSS), a 8-9 m change of direction speed test (CODST), and the RAT. Test-retest and inter-tester reliability testing measures were conducted with the LPG. The intra-class correlation (ICC) of the RAT was 0.870, with no significant (p < 0.05) difference between the test results obtained on the first and second test sessions using a t-test. A dependent samples t-test revealed no significant (p < 0.05) difference between the test results of two different testers with the same population. The HPG were significantly (p = 0.001) superior to those of the LPG on the RAT, with no differences observed on any other variable. The RAT is an acceptably reliable test when considering both test-retest reliability, as well as inter-rater reliability. In addition, the test was valid in distinguishing between players of differing performance level in Australian football, while the 10 mSS and CODST were not. This result suggests that traditional closed skill sprint and sprint with direction change tests may not adequately distinguish between players of different levels of competition in Australian football. © 2006 Sports Medicine Australia.
- Description: C1
- Description: 2003002132
Fixed foot balance training increases rectus femoris activation during landing and jump height in recreationally active women
- Kean, Crystal, Behm, David, Young, Warren
- Authors: Kean, Crystal , Behm, David , Young, Warren
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 5, no. 1 (2006), p. 138-148
- Full Text:
- Reviewed:
- Description: The objective of this study was to determine the effects of fixed foot and functionally directed balance training on static balance time, muscle activation during landing, vertical jump height and sprint time. Twenty-four recreationally active females were tested pre- and post-training (fixed foot balance training, n= 11, functionally directed balance training, n = 7 and control group, n = 6). Experimental subjects completed either fixed foot or functionally directed balance exercises 4 times/week for 6 weeks. Surface electromyography (EMG) was used to assess preparatory and reactive muscle activity of the rectus femoris (RF), biceps femoris (BF), and the soleus during one- and two-foot landings following a jump. Maximum vertical jump height, static balance and 20-meter sprint times were also examined. The fixed foot balance-training group showed a 33% improvement (p < 0.05) in static balance time and 9% improvement in jump height. Neither type of training improved sprint times. Further analysis revealed significant (p < 0.05) overall (data collapsed over groups and legs) increases in reactive RF activity when landing. Independently, the fixed foot balance group showed a 33% increase in reactive RF activity (p < 0.01). Overall, there was also significantly less reactive co-activation following training (p < 0.05). It appears that fixed foot balance training for recreationally active women may provide greater RF activity when landing and increased countermovement jump height. ©Journal of Sports Science and Medicine (2006).
- Description: C1
- Description: 2003002123
- Authors: Kean, Crystal , Behm, David , Young, Warren
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Sports Science and Medicine Vol. 5, no. 1 (2006), p. 138-148
- Full Text:
- Reviewed:
- Description: The objective of this study was to determine the effects of fixed foot and functionally directed balance training on static balance time, muscle activation during landing, vertical jump height and sprint time. Twenty-four recreationally active females were tested pre- and post-training (fixed foot balance training, n= 11, functionally directed balance training, n = 7 and control group, n = 6). Experimental subjects completed either fixed foot or functionally directed balance exercises 4 times/week for 6 weeks. Surface electromyography (EMG) was used to assess preparatory and reactive muscle activity of the rectus femoris (RF), biceps femoris (BF), and the soleus during one- and two-foot landings following a jump. Maximum vertical jump height, static balance and 20-meter sprint times were also examined. The fixed foot balance-training group showed a 33% improvement (p < 0.05) in static balance time and 9% improvement in jump height. Neither type of training improved sprint times. Further analysis revealed significant (p < 0.05) overall (data collapsed over groups and legs) increases in reactive RF activity when landing. Independently, the fixed foot balance group showed a 33% increase in reactive RF activity (p < 0.01). Overall, there was also significantly less reactive co-activation following training (p < 0.05). It appears that fixed foot balance training for recreationally active women may provide greater RF activity when landing and increased countermovement jump height. ©Journal of Sports Science and Medicine (2006).
- Description: C1
- Description: 2003002123
Six minute walk distance is greater when performed in a group than alone
- Grindrod, D., Paton, Carl, Knez, Wade, O'Brien, Brendan
- Authors: Grindrod, D. , Paton, Carl , Knez, Wade , O'Brien, Brendan
- Date: 2006
- Type: Text , Journal article
- Relation: British Journal of Sports Medicine Vol. 40, no. 10 (Oct 2006), p. 876-877
- Full Text:
- Reviewed:
- Description: Objective: To investigate whether the distance covered in the six minute walk test was affected by walking with a group of others in comparison with performing the test alone. Methods: Eight healthy men ( mean (SD) age 21.0 (0.9) years) and eight healthy women ( mean ( SD) age 20.8 (2.0) years) performed in random order two six minute walk tests either alone or in a group of four on two separate occasions one week apart. Results: Distance covered increased significantly from a mean of 653 ( 61) m in the individual male tests to 735 (79) m in the male group tests ( p< 0.05), and 616 ( 75) m in the individual female tests to 701 ( 54) m in the female group tests ( p< 0.01). The men increased the distance walked in six minutes by 12.5% and the women by 13.7% when they performed the test as a group. Conclusion: Performing the six minute walk test in a group facilitates its execution.
- Description: C1
- Description: 2003002117
- Authors: Grindrod, D. , Paton, Carl , Knez, Wade , O'Brien, Brendan
- Date: 2006
- Type: Text , Journal article
- Relation: British Journal of Sports Medicine Vol. 40, no. 10 (Oct 2006), p. 876-877
- Full Text:
- Reviewed:
- Description: Objective: To investigate whether the distance covered in the six minute walk test was affected by walking with a group of others in comparison with performing the test alone. Methods: Eight healthy men ( mean (SD) age 21.0 (0.9) years) and eight healthy women ( mean ( SD) age 20.8 (2.0) years) performed in random order two six minute walk tests either alone or in a group of four on two separate occasions one week apart. Results: Distance covered increased significantly from a mean of 653 ( 61) m in the individual male tests to 735 (79) m in the male group tests ( p< 0.05), and 616 ( 75) m in the individual female tests to 701 ( 54) m in the female group tests ( p< 0.01). The men increased the distance walked in six minutes by 12.5% and the women by 13.7% when they performed the test as a group. Conclusion: Performing the six minute walk test in a group facilitates its execution.
- Description: C1
- Description: 2003002117
Transfer of strength and power training to sports performance
- Authors: Young, Warren
- Date: 2006
- Type: Text , Journal article
- Relation: International Journal of Sports Physiology and Performance Vol. 1, no. (2006), p. 74-83
- Full Text:
- Reviewed:
- Description: The purposes of this review are to identify the factors that contribute to the transference of strength and power training to sports performance and to provide resistance-training guidelines. Using sprinting performance as an example, exercises involving bilateral contractions of the leg muscles resulting in vertical movement, such as squats and jump squats, have minimal transfer to performance. However, plyometric training, including unilateral exercises and horizontal movement of the whole body, elicits significant increases in sprint acceleration performance, thus highlighting the importance of movement pattern and contraction velocity specificity. Relatively large gains in power output in nonspecific movements (intramuscular coordination) can be accompanied by small changes in sprint performance. Research on neural adaptations to resistance training indicates that intermuscular coordination is an important component in achieving transfer to sports skills. Although the specificity of resistance training is important, general strength training is potentially useful for the purposes of increasing body mass, decreasing the risk of soft-tissue injuries, and developing core stability. Hypertrophy and general power exercises can enhance sports performance, but optimal transfer from training also requires a specific exercise program.
- Description: C1
- Description: 2003002126
- Authors: Young, Warren
- Date: 2006
- Type: Text , Journal article
- Relation: International Journal of Sports Physiology and Performance Vol. 1, no. (2006), p. 74-83
- Full Text:
- Reviewed:
- Description: The purposes of this review are to identify the factors that contribute to the transference of strength and power training to sports performance and to provide resistance-training guidelines. Using sprinting performance as an example, exercises involving bilateral contractions of the leg muscles resulting in vertical movement, such as squats and jump squats, have minimal transfer to performance. However, plyometric training, including unilateral exercises and horizontal movement of the whole body, elicits significant increases in sprint acceleration performance, thus highlighting the importance of movement pattern and contraction velocity specificity. Relatively large gains in power output in nonspecific movements (intramuscular coordination) can be accompanied by small changes in sprint performance. Research on neural adaptations to resistance training indicates that intermuscular coordination is an important component in achieving transfer to sports skills. Although the specificity of resistance training is important, general strength training is potentially useful for the purposes of increasing body mass, decreasing the risk of soft-tissue injuries, and developing core stability. Hypertrophy and general power exercises can enhance sports performance, but optimal transfer from training also requires a specific exercise program.
- Description: C1
- Description: 2003002126