Why the study?
Whether resting autonomic function represented by heart rate variability is associated with changes in peak exercise cardiac function remained an unanswered question.
Does age and sex affect resting heart rate variability and its correlation with peak exercise cardiac function in healthy adults?
Comparison
Age groups (younger <40 vs older >55 years old) and sex (males vs females)
Authors
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Resting RR interval linked to peak CPO in females; hypothesis-generating for sex differences and should not yet change practice.
Does age and sex affect resting heart rate variability and its correlation with peak exercise cardiac function in healthy adults?
Resting heart rate variability, specifically RR interval, is associated with peak exercise cardiac power output in healthy females regardless of age, while HF power is associated with CPO only in younger females.
Alyahya et al. (2024) studied this question.
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