Why the study?
Does physical activity level affect the ultra low frequency components of heart rate variability in healthy young subjects?
Does physical activity level affect the ultra low frequency components of heart rate variability in healthy young subjects?
Physical activity is a major contributor to the ultra low frequency components of heart rate variability, suggesting ambulatory HRV studies should account for physical activity patterns.
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Activity patterns warrant consideration in ULF HRV interpretation; leaves open whether activity-adjusted norms improve ambulatory monitoring.
Serrador et al. (1999) studied this question.
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