There is a normal: Fluctuations of heart rate between the phases of respiration in a normal person. 85/min is a normal heart rate. Are you having any other symptoms? Are you drinking coffee or energy drinks in excess? Are you using drugs like marihuana? If u have no other symptoms and u can exercise without any problems, you are probably ok. But, a good history and physical a good idea if that bother you.
Answered 1/14/2018
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