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Medicine & Science in Sports & Exercise:
Applied Sciences: Biodynamics

Effects of steady-state versus stochastic exercise on subsequent cycling performance


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The aims of this investigation were to evaluate the physiological responses to laboratory based stochastic exercise and to assess the effects of stochastic versus steady-state exercise on subsequent cycling time trial (TT) performance. Six competitive cyclists (peak power output (PPO) 432 ± 39 W (values are mean ± SD) undertook in a random order two 150-min paced rides that were either constant load (58% of PPO) or stochastic in nature (58± 12.2% of PPO). These rides were immediately followed by a 20-km TT performance on an air-braked ergometer. Mean heart rate (HR) responses throughout the 150-min paced rides and during the subsequent TT were not significantly different between trials. Yet, despite the similarities in HR, the mean time for the TT was significantly faster (26:32 ± 1:30 vs 28:08 ± 1:47 min, P < 0.05), and the mean power output was significantly greater (340.3 ± 44.2 vs 302.5 ± 42.3 W; 77.8± 10.2 vs 70.0 ± 9.8% of PPO, P < 0.05) following the steady-state ride. These results demonstrate that following 150 min of steady-state riding, subsequent 20 km TT performance was significantly improved when compared with 150 min of stochastic exercise.

©1997The American College of Sports Medicine


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