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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
Published on: October 17, 2018
Acute physiological responses during repeated sprint training with maximum end-expiratory breath-holds
Antoine Raberin1, Tom Citherlet2, Marco Carletta2
1Institute of Sport Sciences, University of Lausanne, Lausanne, 1015, Switzerland. antoine.raberin@unil.ch.
Repeated sprint training in hypoxia with voluntary hypoventilation (RSH-VHL) induced greater hypercapnic and hypoxemic stress than normoxia. RSH-VHL and RSH-UBP created similar stress, but RSH-VHL maintained training load.
Area of Science:
- Exercise Physiology
- Sports Science
- Hypoxia Training
Background:
- Repeated sprint training in hypoxia (RSH) is effective.
- Voluntary hypoventilation at low lung volumes (RSH-VHL) and end-expiratory breath hold (RSH-UBP) are novel RSH variations.
- RSH-UBP is suggested to be a more potent stimulus than RSH-VHL.
Purpose of the Study:
- Compare physiological responses to RSH in normoxia (RSN), RSH-VHL, and RSH-UBP.
- Hypothesize RSH-UBP induces greater hypercapnic and hypoxemic stress.
Main Methods:
- Ten healthy men underwent three ergocycle sprint sessions: RSN, RSH-VHL, RSH-UBP.
- Monitored pulse oxygen saturation (SpO2), end-tidal CO2 (PETCO2), muscle oxygenation, cardiac hemodynamics, and total work.
Main Results:
- RSH-VHL and RSH-UBP increased time below 96% SpO2 compared to RSN.
- Both RSH variations elevated PETCO2 significantly more than RSN.
- Total work was lower in RSH-UBP than RSH-VHL and RSN, despite higher mean power.
Conclusions:
- RSH-VHL is effective for inducing significant hypercapnic and hypoxemic stimuli during repeated sprint training while preserving training load.
- RSH-UBP achieves similar hypercapnic and hypoxic stress but with reduced training duration.
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