High-intensity Interval Training in Different Exercise Modes: Lessons from Time to Exhaustion
Ana Catarina Sousa1,2,3, Ricardo J Fernandes3, Joao Paulo Vilas Boas4
1Research Center for Sports, Exercise and Human Development, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.
International Journal of Sports Medicine
|June 21, 2018
Summary
High-intensity interval training (HIIT) load requires careful consideration of exercise mode. While training at maximal oxygen uptake (VO2max) intensity is flexible, recovery periods are exercise-specific.
Area of Science:
- Exercise Physiology
- Sports Science
- Cardiorespiratory Fitness
Background:
- High-intensity interval training (HIIT) is a popular training method.
- Understanding oxygen uptake (VO2) kinetics is crucial for optimizing HIIT.
- Differences in VO2 response across exercise modes may influence training prescription.
Purpose of the Study:
- To compare temporal VO2 response variables during and after sustained exercise at VO2max intensity across different exercise modes.
- To inform optimal HIIT load prescription by examining exercise mode-specific VO2 kinetics.
Main Methods:
- Forty-five trained male athletes (swimmers, rowers, runners, cyclists) performed incremental and square-wave exercise tests to exhaustion.
- Velocity (vVO2max) or power (wVO2max) at VO2max was determined.
- Breath-by-breath gas analysis measured VO2 response during exercise and recovery.
Main Results:
- VO2 responses were largely similar across modes, except for a higher %VO2max at 50% of time to exhaustion in rowing vs. cycling.
- Swimmers and rowers showed higher %VO2max during recovery compared to cyclists at 30s and 60s.
- Swimmers took longer to reach 50% of VO2max compared to runners and cyclists.
Conclusions:
- Fixed intervals for HIIT at 100% VO2max intensity can be freely set.
- However, recovery periods, whether based on time or intensity, are dependent on the specific exercise mode.
- This highlights the need for exercise-mode-specific considerations in HIIT recovery prescription.
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