Why the study?
Does endurance training alter autonomic functions and baroreflex sensitivity in athletes compared to nonathletes?
Population
30 individuals, comprising 15 athletes (VO2max > 55 ml/(kg.min)) and 15 nonathletes (VO2max < 45 ml/(kg.min)).
Comparison
Endurance training (athlete status) vs Nonathletes
Design
Cross-sectional
Authors
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Supports association of athletic training with vagal predominance and higher baroreflex sensitivity; hypothesis-generating without causal inference.
Does endurance training alter autonomic functions and baroreflex sensitivity in athletes compared to nonathletes?
Endurance training induces an autonomic imbalance characterized by enhanced vagal activity and attenuated sympathetic tone, contributing to resting bradycardia and increased spontaneous baroreflex sensitivity.
Shin et al. (1995) studied this question.
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