New answers tagged heart-rate
There is no simple formula, since both examples you provided could tell you different information about your current fitness level. You could probably run much longer at a HR of 160 than you could at 185. At 160, you may have the fitness to run a marathon. At 185, you may not be able to run much farther than a 5k. Is one "better" than the other? No. It just ...
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