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Exercise & Fitness
How does sleep affect your heart rate?
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Point to be noted: Heart rate during sleep and waking also differs according to the age of the normal person, other factors already discussed in this blog.
I am a retired cardiolgist and have had a resting heart rate that varies between 34 and 46 since I first started to record it when I was a fellow in 1974. I am an avid exerciser and ran 3 marathons in the past. I have never had any apparent ill effects, although had one episode of micturation syncope in 1974. At aged 78, I am able to attain a heart rate of 155 at peak exercise (12-13 mets) suggesting a normal chronotropic response to exercise. Bradycardia without symptoms can be benign and may be related to increased parasympathetic tone especially in well trained fit individuals.
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