The FitBit Activity Tracker (on the website, Android application, and I would presume the iPhone application as well) lets you log various activities so you can track and share them with your friends. ...
I've seen incline, decline, and horizontal squat machines at the gym. Does each one activate different muscles or are they effectively the same?
Today was my fourth or fifth time using the thigh abductors at the gym, and since I began, my inner thighs tremble. I found a similar question here, which has a good explanation of the different ...