Heart rate reserve (HRR) is the difference between resting heart rate (HRrest) and maximum heart rate (HRmax). Heart rate reserve is used when determining exercise heart rates. The Karvonen formula is used to calculate exercise heart rate at a given percentage training intensity.
they generally don't know what's going on, and half of the time they don't know what's wrong with them and once they do know what's wrong, they don't even know what to do to treat it.
