Exercise-related sensations contribute to decrease power during repeated cycle sprints with limited influence on neural drive

Purposes We manipulated the inspired oxygen fraction (FiO 2 ) to examine the effects of physiological perturbations on exercise-related sensations and the neural drive of the quadriceps during repeated, brief, maximal cycle sprints. Methods Nine active males completed a repeated sprint cycle protoco...

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Bibliographic Details
Published in:European journal of applied physiology 2017-11, Vol.117 (11), p.2171-2179
Main Authors: Girard, Olivier, Billaut, François, Christian, Ryan J., Bradley, Paul S., Bishop, David J.
Format: Article
Language:English
Subjects:
Adult
Biomedical and Life Sciences
Biomedicine
Blood levels
Electromyography
Exercise
Fatigue
Heart rate
Human Physiology
Humans
Hypoxia
Hypoxia - physiopathology
Lactic acid
Male
Muscle Contraction
Muscle, Skeletal - innervation
Muscle, Skeletal - physiology
Occupational Medicine/Industrial Medicine
Original Article
Oxygen - metabolism
Physical training
Physiology
Quadriceps muscle
Sensation
Sports Medicine
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Summary:Purposes We manipulated the inspired oxygen fraction (FiO 2 ) to examine the effects of physiological perturbations on exercise-related sensations and the neural drive of the quadriceps during repeated, brief, maximal cycle sprints. Methods Nine active males completed a repeated sprint cycle protocol (10 × 4-s maximal sprints with 30 s of passive recovery) in normoxia (NM; FiO 2 0.21) and severe normobaric hypoxia (HY; FiO 2 0.13). Peak power, quadriceps Root Mean Squared electromyography (RMS EMG), physiological (heart rate, arterial oxygen saturation, blood lactate concentration) and perceptual responses were recorded. Results The 10 sprints in HY were associated with lower arterial oxygen saturation values compared to NM [80.7 ± 0.9 vs. 95.6 ± 0.6%; P  
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-017-3705-y