Take 220 and subtract your age. This equals your MHR. (Example: For a 35 year old your MHR is 185).
Next to determine your low range of 50 percent, simply take 185 (MHR) and multiply it times 50 percent. (Example: For a 35 year old this would equal 92.5).
Finally, to determine your high range of 70 percent, simply take 185 (MHR) and multiply it times 70 percent. (Example: For a 35 year old this would equal 129.5).
*** So, in this example the 35 year-old would want to exercise in a heart rate range of somewhere between 93 - 130 BPM. Keep in mind that this calculation is age-related. It does not take into consideration your fitness level, so utilize it only as a good guideline.Â
