Reduction of maximum heart rate in acute, severe hypoxia.
Open Access
- 1 January 1983
- journal article
- Published by Physiological Society of Japan in The Japanese Journal of Physiology
- Vol. 33 (3) , 503-506
- https://doi.org/10.2170/jjphysiol.33.503
Abstract
By determining a ceiling for heart rate increase in a given exercise with increment of simulated altitude up to 7, 000m, a reduction of maximum heart rate (HRmax) in acute hypoxia was experimentally ascertained. Such a reduction was similarly observed immediately after a high-altitude expedition. In addition, the reduction rate against altitude was close to that shown previously in chronic hypoxia, indicating that the reduction of HRmax might be independent of altitude acclimatization.Keywords
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