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Effects of steady-state versus stochastic exercise on subsequent cycling performance
G S Palmer1, T D Noakes, J A Hawley
1School of Life Science, Kingston University, Kingston Upon Thames, Surrey, England. G.PALMER@KING.AC.UK
Medicine and Science in Sports and Exercise
|May 1, 1997
Summary
Steady-state exercise significantly improves subsequent cycling time trial performance compared to stochastic exercise. Cyclists completed a 20-km time trial faster and with greater power output after steady-state training.
Area of Science:
- Exercise Physiology
- Sports Science
Background:
- Understanding the impact of different exercise protocols on athletic performance is crucial for optimizing training.
- Stochastic exercise, characterized by variable intensity, is increasingly explored as a training method.
Purpose of the Study:
- To compare the physiological responses to laboratory-based stochastic exercise versus steady-state exercise.
- To determine the effects of these exercise protocols on subsequent cycling time trial (TT) performance.
Main Methods:
- Six competitive cyclists completed two 150-minute rides in a randomized order: constant load (steady-state) at 58% of peak power output (PPO) and stochastic exercise (58 ± 12.2% PPO).
- Immediately following each ride, cyclists performed a 20-km TT on an air-braked ergometer.
- Heart rate (HR) and power output were monitored throughout the protocols.
Main Results:
- No significant differences in mean heart rate (HR) were observed between steady-state and stochastic exercise during the rides or the subsequent TT.
- Cyclists completed the 20-km TT significantly faster (26:32 ± 1:30 min vs. 28:08 ± 1:47 min) after the steady-state ride.
- Mean power output during the TT was significantly greater following the steady-state ride (340.3 ± 44.2 W vs. 302.5 ± 42.3 W, 77.8 ± 10.2% PPO vs. 70.0 ± 9.8% PPO).
Conclusions:
- Despite similar HR responses, 150 minutes of steady-state exercise enhances subsequent 20-km cycling TT performance more effectively than stochastic exercise.
- Steady-state exercise appears to be a superior protocol for improving time trial performance in competitive cyclists following prolonged submaximal exertion.