I am thinking of purchasing a Fitbit Flex. I have an indoor rowing machine which is my main form of exercise other than walking. I can't do much else because of injuries. I wondered if my rowing ...
I race go karts, and I'm looking for a way to track my heart rate while I'm on the track. Ideally, I'd like to do it with some sort of time code so I can match my heart rate up with different corners. ...