Key result
Acute 3,500m simulated altitude during exercise increases HR and SNS indicators while reducing PNS indicators.
Why the study?
Does acute exposure to simulated altitude modify heart rate variability during exercise in healthy men?
Population
7 healthy men
Comparison
Acute exposure to simulated altitude during rest… vs Different altitude levels compared to each other
Design
Other, Experiments were conducted in random order
Follow-up
within 2 h of exposure
Authors
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Caution advised interpreting HRV at altitude during exercise; leaves open effects in cardiovascular patients.
RCT (n=7)
Random order
Does acute exposure to simulated altitude modify heart rate variability during exercise in healthy men?
p-value: p=<0.05
Acute exposure to moderate simulated altitude (3,500 m) alters autonomic nervous system activity during exercise, increasing sympathetic and decreasing parasympathetic tone.
Yamamoto et al. (1996) conducted an RCT in Healthy (n=7). Simulated altitude vs. Lower altitudes (e.g., 500 m) was evaluated on Heart rate variability (HRV) indicators (heart rate, SNS indicator, PNS indicator, beta) (p=<0.05). Acute exposure to simulated altitude of 3,500 m during exercise significantly increased heart rate and sympathetic nervous system indicators and decreased parasympathetic indicators (P<0.05).
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