And this, to me, makes them almost useless. That said, there are optical HRMs that are accurate and aimed at athletes, but ... they're aimed at athletes. Fitb

And this, to me, makes them almost useless. That said, there are optical HRMs that are accurate and aimed at athletes, but ... they're aimed at athletes. Fitbit/Jawbone/etc aren't. http://www.mioglobal.com/Default.aspx http://www.mioglobal.com/Default.aspx http://4iiii.com/product/viva-mini/ http://4iiii.com/product/viva-mini/ (this is just a wrist strap, but they're about to release an all-in-one)