steffanihall

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  • Hey tonya_yates, I was wondering the exact same thing... I'm using my Polar ft4 to assess my calories burnt and heart rate levels, and during 1 hour teaching Zumba it says I spend around only 10 minutes in the zone... with my average HR being 188bpm. Using the method of 220-age, My max is 194bpm, but I think the watch is…
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