Two online resources that provide heart rate charts are the American Heart Association and HPMC Occupational Medical Services (OMS). The American Heart Association provides a chart of average target heart zones for different age groups.
HPMC has a more extensive chart of heart rates for different aerobic exercise intensity zones according to age groups. The heart rate is related to a person's pulse, which is the number of times the heart beats in one minute. In order to find the target training heart rate, one needs to know that the maximum heart rate is found by subtracting age from 220, relates the American Heart Association.
The target heart rate can be calculated by multiplying the maximum heart rate by the target intensity zone percent. The target heart zone should be in the range of 65 and 85 percent of the maximum heart rate, states the HPMC OMS. The charts show the estimated heart rate for different intensity zones using these calculations.