I have the Charge HR. I loved using when I was trying to get my bodyfat level down, but I set it aside for a while I try to gain some muscle.
I think it overestimates calorie burn, so I set my weight at about 10 pounds lower than my actual weight so it would be more stingy with calorie burn. One of the worst things to do when trimming down is think you've burned more calories than you actually have.
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