Ronald
I have a a-fib heart condition. It was a year last time I had troubles. One day I put on my Polar chest monitor before I started walking/running on my treadmill and noticed my heart rate was 130. Which means I was A-fib and didn't know it. I went to the ER and got check out and was in A=fib. The dr. said I was lucky I noticed it. Thanks to Polar.

F4
For disappearing calories
For you who want to get a fitter body by knowing how many calories you have burned. The small and simple F4 gives you accurate information and motivates you to reach your targets.
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