Calculate your target heart rate zones for exercise using the Karvonen method with heart rate reserve.
The Karvonen formula provides more accurate exercise intensity targets by incorporating your resting heart rate, which reflects your cardiovascular fitness. Lower resting heart rates mean more efficient hearts.
The Karvonen method calculates target heart rate using Heart Rate Reserve (HRR = Max HR - Resting HR). Target HR = (HRR × intensity%) + Resting HR. It's more personalized than simple percentage of max HR.