The American Heart Association uses a two-line rule of thumb to sort the guesswork out of cardio. Your estimated maximum heart rate is about 220 minus your age, moderate-intensity work happens at 50 ...
Q: I'm a 55-year-old man, and I have been active all my life. I know target heart rates are based on age and was surprised that my heart rate while running is often between 150 and 195. Should I slow ...
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