Add Yahoo as a preferred source to see more of our stories on Google. Zone 2 cardio rate training means working in one of five heart rate zones at 60-70% of your max heart rate. "Zone 2 is where the ...
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Your 'Max Heart Rate' Is Probably Wrong
If you’ve ever worried about your heart rate during exercise being too high or too low, you’ll want to read this. Your "heart rate zones" might be completely wrong. Not only are zones defined ...
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