Ask The Doctors: April 2019

A: It is normal for heart rate (HR) to increase during activity in order to provide nutrients and oxygen to exercising muscles. The formula for obtaining your maximum predicted HR-220 minus your age-tends to underestimate maximal HR by as much as 10 to 20 beats, particularly at older ages. However, an exercise HR of 160 seems high, particularly since a lack of symptoms and ability to talk normally with exercise does not suggest a very high exertion level.
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