The effects of increased absolute training intensity on adaptations to endurance exercise training
- Authors: McNicol, Ashleigh , O'Brien, Brendan , Paton, Carl , Knez, Wade
- Date: 2009
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 12, no. 4 (2009), p. 485-489
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- Description: "Progressive overload" is regarded an important principle to consider in maximising endurance training adaptations, yet little scientific evidence supports this concept. The aim of the present study was to compare differences in endurance performance after a training regime where treadmill-running intensity was incrementally elevated to a regime where running intensity remained unchanged. Twenty-eight healthy untrained males and females were randomly and equally assigned into both regimes. All participants performed 20 min treadmill-running sessions 3 times a week for 6 weeks. Prior to and after training, maximum oxygen uptake (over(V, ̇) O2max), oxygen uptake and velocity at the lactate threshold (LTVO2 and LTv) and maximum treadmill velocity (Vmax) were measured in an incremental treadmill test. 5000 m time trial performance was also assessed. In the incremental intensity regime treadmill velocity commenced at 0.8 km·h-1 below the LTv and was increased by 0.1 km·h-1 every session. In the constant intensity regime treadmill speed was kept constant at 0.8 km·h-1 below the LTv for the duration of the training. The study revealed that both regimens increased over(V, ̇) O2max, Vmax LTVO2, LTv and decreased 5000 m time trial significantly after training. There were no significant differences in the changes between regimens for over(V, ̇) O2max, Vmax and 5000 m time trial. However, the increase in LTVO2 and LTv were significantly greater in the incremental intensity regime compared to the constant intensity regime. The present data show that 20 min treadmill-running sessions performed 3 times a week for 6 weeks improves endurance performance and that progressively elevating exercise intensity is important to maximise improvements in LTVO2 and LTv. © 2008 Sports Medicine Australia.
- Description: 2003008109
The impact of progressive overload on the proportion and frequency of positive cardio-respiratory fitness responders
- Authors: Bell, Leo , McNicol, Ashleigh , McNeil, Elizabeth , Nguyen, Huy , Hunter, Jayden , O'Brien, Brendan
- Date: 2023
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 26, no. 10 (2023), p. 561-563
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- Description: The proportion of individuals whose cardio-respiratory fitness change after endurance training does not exceed the test's measurement error can be 40 %. We determined if progressively increasing treadmill run intensity compared to maintaining the same run intensity, improved the responder proportion to a 6-week 20-minute treadmill training regimen. The intervention response standard deviation method estimated the proportion of responders attributable to progressively increasing run intensity. The mixed-effects model demonstrated V̇O2 peak improved significantly more in the progressive versus constant run intensity group. The proportion of V̇O2 peak responses above the smallest worthwhile change attributable to progressively increasing run intensity was 63.6 %. © 2023 The Author(s)
Treadmill velocity best predicts 5000-m run performance
- Authors: Stratton, E. , O'Brien, Brendan , Harvey, Jack , Blitvich, Jennifer , McNicol, Ashleigh , Janissen, D. , Paton, Carl , Knez, Wade
- Date: 2009
- Type: Text , Journal article
- Relation: International Journal of Sports Medicine Vol. 30, no. 1 (2009), p. 40-45
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- Description: In this study, we aimed to investigate physiological determinants of endurance performance that best predict 5000-m average run velocity before and after endurance training. Thirty-nine previously untrained participants completed a 5000-m run; a constant velocity test (measuring running economy); and an incremental treadmill test to determine maximal oxygen uptake, final treadmill velocity, and velocity and oxygen uptake at lactate threshold, before and after six weeks of endurance training. Maximal oxygen uptake, final treadmill velocity, and velocity and oxygen uptake at threshold all increased significantly after training (p < 0.05). Average velocity for 5000m increased significantly (p < 0.05). Running economy was not significantly altered. Correlation analysis revealed final treadmill velocity was most strongly related to 5000-m performance, in both untrained and trained states (r = 0.89, 0.83). Lactate threshold velocity (r = 0.73, 0.76), maximal oxygen uptake (r = 0.55, 0.51) and oxygen uptake at threshold (r = 0.45, 0.45) also showed significant correlations. In contrast, running economy was not significantly related to performance. These results demonstrate that final treadmill velocity in an V̇O2max test is the single best predictor of 5000-m performance in untrained and trained states. Furthermore, stepwise regression analysis showed that only velocity at lactate threshold significantly improved the accuracy of prediction provided by final treadmill velocity alone. © Georg Thieme Verlag KG Stuttgart.
- Description: 2003008110