If you've already mastered the air squat and you're looking for a little more intensity, let me introduce you to the drop squat. Your glutes and quadriceps will be doing a majority of the work in this ...

Squats are a go-to quad exercise, but they're not the only move to target your upper leg muscles. Here are the other top exercises experts recommend.

The human body is smart: It will always take the path of least resistance to get things done. This is all too clear to fitness professionals when training clients -- beginners and veterans alike -- ...