Max Heart Rate

Ref:

• https://www.cdc.gov/physicalactivity/basics/measuring/heartrate.htm

For moderate-intensity physical activity, your target heart rate should be between 64% and 76%1,2 of your maximum heart rate. You can estimate your maximum heart rate based on your age. To estimate your maximum age-related heart rate, subtract your age from 220. For example, for a 50-year-old person, the estimated maximum age-related heart rate would be calculated as 220 – 50 years = 170 beats per minute (bpm). The 64% and 76% levels would be:

64% level: 170 x 0.64 = 109 bpm, and
76% level: 170 x 0.76 = 129 bpm

This shows that moderate-intensity physical activity for a 50-year-old person will require that the heart rate remains between 109 and 129 bpm during physical activity.

For vigorous-intensity physical activity, your target heart rate should be between 77% and 93%1,2 of your maximum heart rate.

77% level: 170 x 0.77 = 130.9
93% level: 170 x 0.90 = 153