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Acute Physiological Response to Different Sprint Training Protocols in Normobaric Hypoxia.
Naomi Maldonado-Rodriguez1, David J Bentley1,2, Heather M Logan-Sprenger1,2,3
1Faculty of Kinesiology & Physical Education, University of Toronto, Toronto, ON M5S 1A4, Canada.
Summary
Sprint training in normobaric hypoxic (HYP) conditions increases physiological strain compared to normoxic (NOR) conditions. Both HYP protocols may enhance training adaptations in kayakers.
Area of Science:
- Exercise Physiology
- Sports Science
- Hypoxia Training
Background:
- Investigating the physiological and performance impacts of sprint training under normobaric hypoxic conditions.
- Understanding the effects of different sprint durations and intensities in hypoxia.
Purpose of the Study:
- To examine acute physiological responses to two sprint training protocols in normobaric hypoxic conditions.
- To assess the performance effects of these protocols in kayakers.
Main Methods:
- Healthy competitive kayakers (n=7) underwent four sprint sessions over two weeks.
- Sessions included 12x5s or 3x20s sprints in normoxic (NOR) or hypoxic (HYP) conditions.
- Monitored peak power output (PPO), RPE, HR, and blood lactate; analyzed blood gases.
Main Results:
- Hypoxic conditions (HYP) induced greater physiological strain (RPE, HR, blood lactate) and altered blood gases (decreased pCO2, pO2, sO2) compared to normoxic (NOR).
- Peak power output (PPO) did not differ between conditions or protocols.
- Rate of perceived exertion (RPE) was higher in the HYP 12x5s protocol.
Conclusions:
- Normobaric hypoxic conditions elicit greater physiological strain than normoxic conditions during sprint training.
- Both sprint training protocols in hypoxia may offer superior training adaptations compared to normoxia for kayakers.
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