Key result
Endurance training in athletes was associated with significantly higher high-frequency power in RR interval spectra compared to nonathletes, indicating enhanced vagal activity.
Why the study?
Does endurance training alter autonomic function and baroreflex sensitivity in athletes compared to nonathletes?
Population
30 individuals, comprising 15 athletes and 15 nonathletes
Comparison
Endurance training (athlete status) vs Nonathlete status
Design
Cross-sectional
Authors
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May explain athlete bradycardia via vagal enhancement; leaves open causal effects of endurance training on autonomic function.
Cross-Sectional (n=30)
Does endurance training alter autonomic function and baroreflex sensitivity in athletes compared to nonathletes?
Endurance training is associated with enhanced vagal activity, which may partially explain resting bradycardia in athletes.
Shin et al. (1997) conducted a cross-sectional in Healthy (athletes vs nonathletes) (n=30). Endurance training (athlete status) vs. Nonathletes was evaluated on High frequency (HF) power in RR interval spectra. Endurance training in athletes was associated with significantly higher high-frequency power in RR interval spectra compared to nonathletes, indicating enhanced vagal activity.
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