Stephanie Pearson is a contributing editor to Outside, a 2023 National Geographic Explorer, and the author of 100 Great American Parks. As part of their newly updated line, the Polar F6 ($120; ...
January 29, 2006 Finish heart-rate monitoring specialist Polar invented the first wireless heart rate monitor (HRM) in 1977 and has been a step ahead of the rest in helping people understand the ...
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