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Relationship between oxygen uptake kinetics and performance in repeated running sprints
Grégory Dupont1, Grégoire P Millet, Comlavi Guinhouya
1Laboratory of Human Movement Studies, EA 3608, Faculty of Sports Sciences and Physical Education, University of Lille 2, 9, rue de l'université, 59790, Ronchin, France. gregory.dupont@univ-lille2.fr
European Journal of Applied Physiology
|June 25, 2005
Summary
Athletes with faster oxygen uptake (VO2) kinetics during exercise can better maintain speed during repeated sprints. This indicates improved VO2 adjustment contributes to enhanced performance in high-intensity intermittent exercise.
Area of Science:
- Exercise Physiology
- Sports Science
- Human Performance
Background:
- Oxygen uptake (VO2) kinetics describe the body's ability to adjust oxygen consumption during exercise.
- Faster VO2 kinetics are associated with improved endurance and performance.
- Repeated sprint exercise (RSE) is a common measure of anaerobic capacity and performance in team sports.
Purpose of the Study:
- To investigate the relationship between VO2 kinetics during constant exercise and performance during repeated sprint exercise (RSE) in male soccer players.
- To test the hypothesis that a shorter time constant for the fast component of VO2 kinetics predicts better speed maintenance during RSE.
Main Methods:
- Eleven male soccer players underwent a graded exercise test, two constant exercise tests at 60% maximal aerobic speed, and a repeated sprint exercise (RSE) protocol.
- VO2 kinetics parameters (time delay, time constant, amplitude) were modeled during constant exercise.
- RSE involved fifteen 40-m sprints with 25-second active recovery periods.
Main Results:
- A significant correlation was observed between VO2 and the relative decrease in speed during RSE (r=0.71, p<0.05).
- Significant correlations were found between the time constant of the primary VO2 phase and both the relative decrease in speed (r=0.80, p<0.01) and cumulated sprint time (r=0.80, p<0.01) during RSE.
- No significant correlation was found between VO2 and cumulated sprint time (r=0.48, p>0.05).
Conclusions:
- Individuals with faster VO2 kinetics exhibit superior speed maintenance and reduced speed decline during repeated sprint exercise.
- Faster VO2 adjustment during constant exercise is linked to better performance in intermittent high-intensity exercise like RSE.
- These findings highlight the importance of VO2 kinetics for performance in sports requiring repeated bursts of intense activity.