Absolutely correct! There are several different target heart rate algorithms, all of which are attempts to fit a simple formula to experimental data that has a surprising amount of non-age & sex related variability. fastest-fascist has it right. If you're health, go at what you think is your fastest _sustainable_ pace and back off a bit if you feel nauseous. I regularly exercise at the top end of the target heart rate range for someone 20 years younger.
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Absolutely correct! There are several different target heart rate algorithms, all of which are attempts to fit a simple formula to experimental data that has a surprising amount of non-age & sex related variability. fastest-fascist has it right. If you're health, go at what you think is your fastest _sustainable_ pace and back off a bit if you feel nauseous. I regularly exercise at the top end of the target heart rate range for someone 20 years younger.