Why the study?
Does caffeine intake alter heart rate variability before and during progressive exercise in healthy volunteers?
Does caffeine intake alter heart rate variability before and during progressive exercise in healthy volunteers?
Caffeine exerts differential effects on autonomic function, increasing markers of cardiac vagal tone at rest but decreasing them during progressive exercise.
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Caffeine's context-dependent autonomic effects warrant consideration during exercise testing; extends resting HRV data to progressive protocols in healthy adults.
Yeragani et al. (2005) studied this question.
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