Why the study?
Does 5 months of vigorous training alter cardiac autonomic control measured by heart rate variability in high level athletes?
Does 5 months of vigorous training alter cardiac autonomic control measured by heart rate variability in high level athletes?
Intensive training in athletes lowers heart rate without altering heart rate variability, suggesting mechanisms other than cardiac autonomic control drive athletic bradycardia.
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Training bradycardia in athletes occurs without HRV changes; leaves open non-autonomic mechanisms.
Bonaduce et al. (1998) studied this question.
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