February 1, 1989Medicine & Science in Sports & Exercise

Exercise training bradycardia: the role of autonomic balance

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Why the study?

Does endurance training alter intrinsic heart rate and autonomic balance in men?

Population

10 endurance-trained (ET) and 10 nontrained (NT) men (n=20)

Comparison

Endurance training (ET group) vs Nontrained (NT group)

Design

Cross-sectional

Authors

MSMichael L. SmithUniversity of North Texas DHDonna L. HudsonSmall Business Administration HGH. M. GraitzerTexas College

Discussion

Member takes

Implication

Endurance training may lower intrinsic heart rate via parasympathetic dominance; hypothesis-generating and requires prospective confirmation before practice change.

Structured PICO

Does endurance training alter intrinsic heart rate and autonomic balance in men?

Population

10 endurance-trained (ET) and 10 nontrained (NT) men (n=20)

Intervention

Endurance training (ET group)

Comparator

Nontrained (NT group)

Outcome

Resting heart rate (HRr), intrinsic heart rate (HRo), and resting autonomic balance (Abal)surrogate

Exercise training bradycardia is driven by both a lower intrinsic heart rate and augmented parasympathetic dominance.

Cite This Study

Smith et al. (1989) studied this question.

synapsesocial.com/papers/69f69177e405cc4465bc2b92 https://doi.org/10.1249/00005768-198902000-00008

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Implication

Endurance training may lower intrinsic heart rate via parasympathetic dominance; hypothesis-generating and requires prospective confirmation before practice change.