Polar FT7 vs FT40
I recently bought the FT7 and so far I love it. However, the more I read about how crucial the V02max is for an accurate reading, the more I'm considering upgrading to the FT40 and paying the $30 difference. For those of you who are familiar with the Polar line, do you think it's worth it or am I fine with the FT7? This is…
