EDIT: went back and read FitBit&#x27;s response. My summary: &quot;we stand by the accuracy of our monitor&#x27;s, but we make no claim that they are to be used as scientific or medical devices.&quot; Oh, you mean not to be used for, say, a <i>doctor-prescribed fitness regimen</i>? IOW, they want to have it both ways. Sure, the devices are accurate, but they are to be used for entertainment purposes only.