Answer: Do you want to get the most out of those 35 minutes on the treadmill, or any kind of cardio exercise? You can maximize the benefits of cardiovascular activity when you exercise in the zone of your target heart rate (THR). All you need to get started is a calculator and a pulse. There are quick and easy ways to get good estimates of your target heart rate zones, but if you want to get the most reliable measurements possible without any fancy equipment, follow this formula.
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