Related Experiment Videos
The relationship between power and the time to achieve .VO(2max)
David W Hill1, David C Poole, Jimmy C Smith
1Department of Kinesiology, University of North Texas, Denton, TX 76203-1337, USA. dhill@unt.edu
Medicine and Science in Sports and Exercise
|April 5, 2002
Summary
The severe exercise intensity domain
Area of Science:
- Exercise Physiology
- Human Performance
- Sports Science
Background:
- The severe exercise intensity domain is crucial for understanding physiological limits.
- Defining the boundaries of this domain informs training protocols and performance analysis.
Purpose of the Study:
- To characterize oxygen uptake (VO2) kinetics within the severe exercise intensity domain.
- To identify the upper and lower boundaries of severe exercise intensity.
Main Methods:
- Participants completed cycle ergometer tests to exhaustion at various work rates.
- Work rates ranged from 95% to 135% of maximum power (Pmax).
Main Results:
- The relationship between power and time to fatigue was hyperbolic, with a critical power (Pcritical) asymptote.
- Oxygen uptake (VO2) response time to VO2max also followed a hyperbolic relationship.
- The power asymptote for reaching VO2max was not significantly different from Pcritical.
Conclusions:
- The upper boundary of the severe exercise intensity domain is approximately 136% Pmax.
- This upper boundary represents the highest work rate allowing VO2 to reach its maximum.
- The lower boundary is just above Pcritical, the highest sustainable work rate without eliciting VO2max.