Most fitness professionals recommend exercising within 55 to 85 percent of your MHR (maximum heart rate). The MHR is calculated by subtracting your age from _____.
Answer 220
The MHR is calculated as 220 minus your age. For example, the MHR of a 45 year old would be 220 - 45 = 175. This number represents the average maximum number of times your heart should beat per minute of exercise.
Asked by Rachel Bortles · Last updated 5 years ago · 1.7K views · SOURCE
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