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Respiratory training, hypoxic ventilatory response and acute mountain sickness
G Markov1, R Orler, U Boutellier
1Swiss Federal Institute of Technology, Zürich, Switzerland.
Respiration Physiology
|September 1, 1996
Summary
Respiratory training did not alter the hypoxic ventilatory response (HVR) or increase susceptibility to acute mountain sickness (AMS) in healthy individuals. This suggests that breathing exercises do not negatively impact these physiological responses.
Area of Science:
- Exercise Physiology
- Respiratory Medicine
- Altitude Physiology
Background:
- Low hypoxic ventilatory response (HVR) is linked to endurance athletes, reduced exercise ventilation, and increased acute mountain sickness (AMS) susceptibility.
- Respiratory training has previously improved endurance and reduced exercise ventilation.
Purpose of the Study:
- To investigate if respiratory training alone could reduce HVR and elevate AMS susceptibility.
- To determine the effects of respiratory training on physiological responses relevant to altitude exposure and endurance.
Main Methods:
- 16 healthy subjects were assessed for HVR and AMS susceptibility.
- Eight subjects underwent a 4-5 week respiratory training program (isocapnic hyperpnea).
- Eight subjects served as a control group.
Main Results:
- Respiratory training significantly improved breathing endurance (p < 0.05).
- No significant changes in HVR or AMS scores were observed post-training.
- No significant differences were found between the training and control groups.
Conclusions:
- Respiratory training does not appear to depress hypoxic ventilatory response.
- Breathing exercises do not increase the risk of developing acute mountain sickness.
- The study indicates respiratory training is safe concerning HVR and AMS risk.