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We investigated the effect of physical activity on heart rate variability (HRV) and carotid intima-media thickness (IMT) in elderly subjects and the relationship between HRV and IMT. Thirty-two elderly sedentary subjects and 32 age-matched endurance athletes underwent ultrasonography of the carotid wall for measuring IMT, and 24-h ECG monitoring for measuring HRV. Elderly athletes had evidence of...
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