
Polar Oh1

Polar Oh1
7 years ago • purchased this product
For me, the OH1 is the ultimate in heart rate measurement.
Chest straps are accurate but terribly uncomfortable and slip. Optical sensors on the wrist are useless in winter, especially in sub-zero temperatures, the blood flow in the wrist is not great (->ungau) and also the wrist has to be free of fabric.
I don't notice the OH1 at all when I wear it, it's small and not a problem in winter as I can wear it under my running clothes. I use it with my iPhone and Polar Flow or Strava. Works great.