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Simulated moderate hypoxia reduces intermittent sprint performance in games players
G Turner1, O R Gibson, N S Maxwell
1Exercise and Environmental Physiology School of Sport and Service Management University of Brighton, Eastbourne, UK - gt6@uni.brighton.ac.uk.
The Journal of Sports Medicine and Physical Fitness
|October 2, 2014
Summary
Moderate altitude (hypoxia) significantly impairs intermittent sprint exercise performance, reducing peak power, mean power, and total work done. Athletes may experience a performance disadvantage in these conditions.
Area of Science:
- Sports Science
- Exercise Physiology
- Altitude Training
Background:
- Exercise at altitude presents greater physiological stress than sea-level exercise.
- Moderate hypoxic environments can impact athletic performance.
Purpose of the Study:
- To investigate the effects of a moderate hypoxic environment on intermittent sprint exercise performance.
- To compare exercise outcomes in hypoxia versus normoxia.
Main Methods:
- Nine male athletes performed a cycling intermittent sprint protocol (CISP×2) in both hypoxic (FiO2=~17%) and normoxic (FiO2=~21%) conditions.
- Peak power output (PPO), mean power output (MPO), and total work done (WD) were measured during the protocol.
- Physiological responses, including heart rate and oxygen saturation, were monitored.
Main Results:
- Hypoxia significantly reduced PPO (~4%), MPO (~5%), and WD (~5%) compared to normoxia.
- Performance decrements were greater during the second half of the intermittent sprint protocol in hypoxia.
- Heart rate was elevated and oxygen saturation was lower in the hypoxic condition.
Conclusions:
- Moderate hypoxia negatively affects intermittent sprint exercise capacity.
- Athletes are likely to be at a performance disadvantage when undertaking intermittent sprinting at moderate altitudes.
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