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Clarksville, TN
A 21-year-old male asked:

Heart rate as low as 40 at night in bed, but i feel perfectly fine. increases with exercise, should i be worried about heart block?

1 doctor answer1 doctor weighed in
Dr. Daniel Ziegler
Emergency Medicine 31 years experience
No: At your age (21), a resting heart rate of 40 indicates you are in excellent condition. My guess is that you run or engage in some other aerobic exercise regularly. If your heart rate changes subtly with your breathing (speeds up then slows down with each breathing cycle) its called a sinus arrhythmia which is normal in young athletes and would confirm what I'm saying but doesn't occur in everyone.
Last updated May 27, 2018

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