Is 140 bpm high for walking?
For the high end of your target heart rate, multiply 220 bpm minus your age by 0. For example, for a 40-year-old it’d be 180 bpm x 0. For this person, their target heart rate while walking would be between 90 and 153 beats per minute. The maximum rate is based on your age, as subtracted from 220. So for a 50-year-old, maximum heart rate is 220 minus 50, or 170 beats per minute. At a 50 percent exertion level, your target would be 50 percent of that maximum, or 85 beats per minute.