Activity measurement
I have been using a Fitbit activity tracker over the last couple of months, which has been an exciting experience, and which has triggered me to move more than I otherwise would. For some new experiments we are going to run in the lab, we have bought a bunch of AX3 sensors. These are small accelerometers with long-term storage ability (~30 days of 100Hz recording!), and of course, I wanted to test out how they work....