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Published on: March 15, 2019
Excessive oxygen uptake during exercise and recovery in heavy exercise
1Exercise Physiology, Graduate School of Education, Hokkaido University, Sapporo, Japan. yano@edu.hokudai.ac.jp
Physiological Research
|February 15, 2007
Summary
This study found that excessive oxygen uptake (VO2) occurs during the recovery period following strenuous exercise. This suggests that the oxygen to adenosine triphosphate (ATP) ratio remains elevated post-exercise.
Area of Science:
- Exercise Physiology
- Metabolic Responses
Background:
- Understanding oxygen uptake (VO2) kinetics is crucial for assessing exercise efficiency.
- Excessive VO2, or oxygen deficit, during recovery indicates prolonged metabolic stress.
Purpose of the Study:
- To investigate if excessive oxygen uptake (VO2) occurs during recovery after heavy exercise.
- To quantify the duration and characteristics of excessive VO2 during the recovery phase.
Main Methods:
- Participants performed moderate (40% peak VO2) and heavy (70% peak VO2) intensity exercises.
- Oxygen uptake kinetics were measured during exercise and a 10-minute zero-watt recovery period.
- Excessive VO2 was calculated by comparing actual VO2 to estimated VO2 based on moderate exercise data.
Main Results:
- The time constant for excessive VO2 during exercise was significantly shorter (1.88 min) than during recovery (9.61 min).
- A significant excessive VO2 was observed during the recovery phase after heavy exercise.
Conclusions:
- Heavy exercise leads to a delayed but prolonged period of excessive oxygen uptake during recovery.
- This suggests an elevated oxygen to adenosine triphosphate (ATP) ratio persists into the recovery period following intense exertion.
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