Key result
Strenuous exercise decreased absolute low- and high-frequency heart rate variability power at onset (P<0.05), while higher intensities increased normalized high-frequency power (P<0.05).
Why the study?
Does strenuous exercise alter heart rate variability indices in healthy trained subjects?
Population
14 healthy trained subjects
Comparison
Strenuous exercise at varying intensities (60%… vs Baseline or lower intensity exercise
Design
Other
Authors
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Caution against using HRV to assess autonomic modulation during strenuous exercise; leaves open nonautonomic and respiratory influences on spectral indices.
Observational (n=14)
Does strenuous exercise alter heart rate variability indices in healthy trained subjects?
p-value: p=<0.05
HRV and usual indexes of sympathetic activity do not accurately reflect changes in autonomic modulation during exhaustive exercise, as nonautonomic mechanisms and respiratory control influence the HF-peak shift.
Pichon et al. (2004) conducted an observational in Healthy (n=14). Strenuous exercise vs. Rest was evaluated on Heart rate variability indices (low-frequency and high-frequency components) (p=<0.05). Strenuous exercise decreased absolute low- and high-frequency heart rate variability power at onset (P<0.05), while higher intensities increased normalized high-frequency power (P<0.05).
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