how high does my heart rate have to be for fat burning
Calculation. To figure your fat-burning target heart rate zone, you first need to estimate your maximum heart rate, or MHR. If you're male, subtract your age from 220 to estimate your MHR. If you're female, subtract your age from 226. For example, a 40-year-old man's MHR would be 180 beats per minute.Since the fat-burning target heart rate zone is 60 to 70 percent of MHR, he would aim for a heart rate of 108 to 126 beats per minute.alculation. To figure your fat-burning target heart rate zone, you first need to estimate your maximum heart rate, or MHR. If you're male, subtract your age from 220 to estimate your MHR. If you're female, subtract your age from 226. For example, a 40-year-old man's MHR would be 180 beats per minute.