A recent study looked at one specific indicator of good heart health--heart rate variability (HRV). The greater the HRV, the better. The researchers did not find any major differences between the endurance-trained exercisers and those who exercised at a moderate level similar to yours. There was a definite difference between the men who were classified as sedentary when compared to these other two groups. The sedentary men had less heart rate variability and higher resting pulses.
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