Description:
Physical activity is important for the health of all individuals, however, the determinants of physical activity behaviour for women who are overweight remain largely unexplored. The purpose of this investigation was to explore a range of factors that influence participation in physical activity for a group of women who are overweight. Participants were 30 women, aged 25-71 years, with a mean age of 46.8 years (+12.95) and an average BMI of 31.2 kg/m(2) (+5.6). Self-reported level of physical activity, perceived barriers and facilitators of physical activity, attitudes, intentions and perceived behavioural. control to physical activity were measured. Seventeen participants were generally active, with self-reported moderate physical activity of 218.53 min (+/- 113.82) in the last 7 days; whereas 13 participants were reportedly less active 43.46 (+/- 42.98) min. Active participants were more likely to identify social reasons for participating in physical activity, while inactive participants perceived that their laziness prevented them from being physically active. There were no significant differences between active and inactive overweight women for attitude, intention or subjective norm for moderate-intensity physical activity. There was a significant difference between these women in perceived behavioural control (p = .014) for moderate-intensity physical activity, as women who felt more in control of their physical activity behaviour were more likely to engage in physical activity than inactive women. Future research should investigate interventions to increase behavioural control of moderate-intensity physical activity in women who are overweight. (c) 2007 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
Description:
Physical activity is important for the health of all individuals, however, the determinants of physical activity behaviour for women who are overweight remain largely unexplored. The purpose of this investigation was to explore a range of factors that influence participation in physical activity for a group of women who are overweight. Participants were 30 women, aged 25-71 years, with a mean age of 46.8 years (+12.95) and an average BMI of 31.2 kg/m(2) (+5.6). Self-reported level of physical activity, perceived barriers and facilitators of physical activity, attitudes, intentions and perceived behavioural. control to physical activity were measured. Seventeen participants were generally active, with self-reported moderate physical activity of 218.53 min (+/- 113.82) in the last 7 days; whereas 13 participants were reportedly less active 43.46 (+/- 42.98) min. Active participants were more likely to identify social reasons for participating in physical activity, while inactive participants perceived that their laziness prevented them from being physically active. There were no significant differences between active and inactive overweight women for attitude, intention or subjective norm for moderate-intensity physical activity. There was a significant difference between these women in perceived behavioural control (p = .014) for moderate-intensity physical activity, as women who felt more in control of their physical activity behaviour were more likely to engage in physical activity than inactive women. Future research should investigate interventions to increase behavioural control of moderate-intensity physical activity in women who are overweight. (c) 2007 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
Description:
This study examined the use of imagery according to Paivio's (1985) general analytic framework. The aims were to examine functional differences in imagery use according to the five subscales of the SIQ, to investigate differences in imagery use by competitive level, and to explore the influence on the use of imagery of skills involving a perceptual target (reactive tasks) and without a perceptual target (nonreactive tasks). Participants included 484 individuals (280 male, 204 female), with a mean age of 20.39 (SD = 4.10) from the United Kingdom, Finland, and Australia. The group comprised 84 national, 210 state, 120 district, and 70 recreational level athletes representing 54 sports. Participants completed a demographic information sheet and the Sport Imagery Questionnaire (SIQ). Participants were classified according to competitive level and task type. Results indicated that overall participants used more motivational general-mastery imagery. A one-way multivariate analysis of variance revealed that there were significant differences among the four competitive levels on imagery use with the district level participants reporting significantly higher use of motivational general-arousal (MG-A) imagery than state and national level participants and national level participants reporting higher use of cognitive specific (CS) imagery than recreational level participants. There was also a significant difference between tasks with a perceptual target and tasks with no target for motivational-specific imagery, with higher scores for tasks with a perceptual target. The results suggest the continued evaluation of imagery use in relation to competitive level and support that task type may influence the functional use of imagery in sport.
Description:
The effects of different amounts of mental practice on the performance of a motor skill were studied. Research supports the effectiveness of mental practice on performance; however, little is known about how much practice is needed and whether there is an optimal amount for these practice effects. Participants, 209 students ages 18 to 44 years (M=20.5, SD=2.9), completed a pre- and posttest of dart throwing with the nonpreferred hand. In the practice phase, participants completed either 25 (Mental Practice 25), 50 (Mental Practice 50), or 100 (Mental Practice 100) trials of the darts task or 50 trials of a catching task (Catching Task). Performance for all groups improved from pre- to posttest. Improvements for the three mental practice groups were greater than for the Catching Task group; however, there were no differences for the three Mental Practice groups. The findings support the positive effect of mental practice over a control condition and suggest that small amounts of mental practice may be sufficient for performance improvements, at least for a simple motor skill.
Description:
In this review we identified sport-based perceptual-cognitive training literature to systematically evaluate current video-based methodologies and their resultant effectiveness to improve perceptual-cognitive performance (i.e., decision-making). A comprehensive literature search of electronic databases from 1994-2013 was conducted to identify relevant studies. We identified 139 articles, of which 25 met all the inclusion criteria. Study design and test measures of the 25 articles were assessed against a classification scale to rate methodological quality. The methodological quality of the 25 studies varied, with quasi-experimental the most common design. Additionally, studies varied in the skill level of participants and the amount of video-based information presented during the training. We conclude that videobased training programs can be used to enhance perceptual-cognitive performance and outline several recommendations for future video-based perceptual-cognitive training programs particularly with respect to the validity and reliability of the instruments used to measure perceptual-cognitive performance.
Description:
The aim of this study is to investigate the effects of in-game physical exertion on decision-making performance of Australian football umpires. Fifteen Australian football umpires (Mage = 36, s = 13.5 years; Mgames umpired = 235.2, s = 151.3) volunteered to participate in the study. During five competitive Australian football pre-season games, measures of in-game physical exertion (blood lactate levels, global positioning system [GPS]) and decision-making performance (video-based test) were obtained. There were no significant correlations between physical exertion in a particular quarter and decision-making performance in either the same quarter or any other quarter. Video-based decision-making performance was effected by time in game χ2(3) = 24.24, P = 0.001, with Quarter 4 performance significantly better than both Quarter 2 and Quarter 3. In-game physical exertion (blood lactate) significantly decreased over the course of the game χ2(3) = 11.58, P = 0.009. Results indicate no definable link between in-game physical exertion and decision-making performance. It is, however, presumed that decision-making performance may be affected by the time or context of the game. Future research is warranted to explore the relationship between physical exertion and decision-making performance to potentially inform Australian football umpire training programmes that replicate in-game physical and decision-making demands.
Description:
Children’s activity choices and patterns of activity in the after-school-hours period (between the end of school and dinner) can be important predictors of daily activity levels The Out of School Hours Sports Program (OSHSP) is a state-wide physical activity initiative that provides structured sporting experiences for children in formal out-of-school-hours care (OSHC) involving 17 State Sporting Associations (SSAs) and 70 OSHC services. Participants in the evaluation were 86 children (27 girls and 59 boys) and 86 parents, and 20 deliverers of the OSHSP at various OSHC services. The average age of the children was 7.7 years (SD = 1.6). Measures included surveys, focus groups, semi-structured interviews, and document analysis. The OSHSP initiative was evaluated over three years on four levels: reactions of the deliverers, advances in skills and knowledge, attitudes of the deliverers, and success of the initiatives against program objectives. The evaluation suggested that deliverers remained concerned about the requirements of delivering the initiative. Often deliverers did not modify their current practices to match the objectives of the OSHSP, possibly due to a clash between deliverer beliefs and program objectives. The children were having fun (97.5%) and learning new skills (89%). Most participants (76.7%) indicated an intention to continue their participation in the sport being delivered at the OSHSP into club sport participation. Children in the OSHSP were generally very active, with most (88%) already participating in sport outside the OSHSP suggesting that the target population may be difficult to access.
Description:
Perceptual-cognitive skills and decision-making in sport have typically been explored using videobased protocols in settings where participants are not exposed to the type of competitive pressures that characterise a game situation. Consequently, this study aimed to investigate the influence of competitive pressure, or competitive anxiety, on decision-making accuracy. Seventy-seven (Male=44, Female=33) undergraduate students with mean age of 20.16 years (SD = 3.18) were randomly assigned to an experimental (n=56) or control group (n=21) and completed a video–based perceptual decision-making test of 25 temporally occluded offensive soccer plays. Participants in the experimental group completed the test with and without competitive pressure conditions. Pressure was manipulated by introducing a competition for a monetary prize. Participants in the control condition completed the test twice without competition. All participants completed a state anxiety measure prior to each test. The competition produced significantly higher cognitive anxiety than no competition; however, this was not reflected in any significant differences in decisionmaking accuracy. Although not statistically significant, more experienced performers tended to score more accurately with competitive pressure.
Description:
Demonstrations of the CFA process in the context of imagery abilities and imagery use assessment are severely lacking. Presently, very few imagery measures from either general or sport psychology have had their factor structure confirmed using structural equation modeling to. Irrespective of the accepted difficulties in the assessment of the imagery process, understanding in the field can only be enhanced through the application of appropriate statistical tools to demonstrate the relationship between measured variables and latent constructs. This paper details the examination of the factor structures of the Sport Imagery Ability Measure (SIAM) and the Sport Imagery Questionnaire (SIQ), using structural equation modeling. Confirmatory models of the key characteristics of mental imagery in relation to sport are also discussed. The SIAM is a 48-item self-report measure that uses four sport-related scenes to examine the dimensional, sensorial, and emotional characteristics of generating images. The SIQ is a 30-item self-report measure that examines five characteristics associated with the cognitive and motivational aspects of imagery use. Participants (N = 514) from universities and elite sport groups in Australia, England, and Finland completed the measures. Confirmatory factor analyses of models proposed by the authors of each measure were conducted using AMOS 4.0 software. The SIAM threefactor model was a reasonable to good fit for the data with all fit indices except for the RMSEA (0.12) at or above accepted minima. A five-factor model tested for the SIQ did not result in as many acceptable fit indices, with only the RMSEA (0.07) indicating a good fit. Alternative models for both measures are examined and the implications of these findings in relation to both the evaluation and conceptualization of sport imagery are discussed.
Description:
OBJECTIVES: To develop a valid and reliable video-based decision-making test to examine and monitor the decision-making performance of Australian football umpires. DESIGN: Validation assessments with test re-test reliability. METHODS: A video-based decision-making test was developed from a pool of 156 video-based decision-making situations. Australian football umpires (n=56) and players (n=45) participated in two separate phases of analysis. In phase one, players completed a test re-test reliability assessment with a 100 video-clips. Results indicated 24 clips were a reliable measure of decision-making performance. In phase two, umpires completed a test re-test protocol with 80 clips, 24 of which were the reliable clips identified by the player cohort in phase one. These 24 clips provided a measure of construct validity. Face and content validity were assessed by skill acquisition specialists, expert umpire coaches, and umpires. RESULTS: From each of phase one and two of the reliability assessment, 24 clips were found to have a kappa value greater than 0.30, providing a total of 48 reliable video-clips. Construct validity was supported, with the umpire group performing significantly better than the player group on the 24 clips presented to both groups on each testing occasion. Face and content validity were also demonstrated. CONCLUSIONS: This investigation demonstrated the ability prospectively to determine reliability and validity of the video-based decision-making test designed specifically for Australian football umpires. Establishing the validity and reliability of the video clips ensures future investigations can accurately and consistently measure the decision-making performance of Australian football umpires.
Description:
This study investigated the effects of imagery training on reactive agility and whether reacting to unpredictable stimuli could be improved using imagery. Forty-seven female athletes (Mage = 21.51, SD = 2.32) were randomly assigned to either a three-week physical training, imagery training, or control condition. Physical training condition involved physically rehearsing the reactive agility task, whereas the imagery training condition involved imagining the presenting stimulus and performing the reactive agility task. The control condition did no reactive agility training. A 3 (training conditions) x 7 (reactive agility performance components) mixed-model MANOVA was conducted to examine changes in reactive agility performance from the training interventions. Physical training improved decision time components and overall reactive agility performance. Imagery training improved Stimulus-Decision Time and Stimulus-Foot performance, but not overall reactive agility performance. No performance improvements occurred for the control condition. Findings support imagery use for the decision time variables associated with lightstimulus reactive agility performance. The lack of overall reactive performance improvement may indicate that imagery training is not effective for all components of perceptual-motor performance. Performance change inconsistencies appear to indicate that participants may not have generated unpredictable stimuli during imagery. Future investigation as to whether imagery improvements translate to sport-specific reactive tasks is needed.
Description:
This study investigated the effects of imagery training on reactive agility and whether reacting to unpredictable stimuli could be improved using imagery. Forty-seven female athletes (Mage = 21.51, SD = 2.32) were randomly assigned to either a three-week physical training, imagery training, or control condition. Physical training condition involved physically rehearsing the reactive agility task, whereas the imagery training condition involved imagining the presenting stimulus and performing the reactive agility task. The control condition did no reactive agility training. A 3 (training conditions) x 7 (reactive agility performance components) mixed-model MANOVA was conducted to examine changes in reactive agility performance from the training interventions. Physical training improved decision time components and overall reactive agility performance. Imagery training improved Stimulus-Decision Time and Stimulus-Foot performance, but not overall reactive agility performance. No performance improvements occurred for the control condition. Findings support imagery use for the decision time variables associated with lightstimulus reactive agility performance. The lack of overall reactive performance improvement may indicate that imagery training is not effective for all components of perceptual-motor performance. Performance change inconsistencies appear to indicate that participants may not have generated unpredictable stimuli during imagery. Future investigation as to whether imagery improvements translate to sport-specific reactive tasks is needed.
Description:
Since the 1970's, when Suinn (1972) proposed early systematic applications of imagery in posrt, including Visuo-Motor Behaviour Rehearsal (VMBR), imagery has been a central focus of research and practice in sport psychology.