Move of the Week: Step Up + Bicep Curl

This compound exercise works your butt, leg, core, and arm muscles all at the same time.

4 Key Ab Muscles and How to Target Them

Pretty much everyone could use stronger abdominal muscles. Here's how to get them.

Move of the Week: Dirty Dog

This exercise from Biggest Loser trainer Jen Widerstrom may have a funny name, but it will seriously work your butt, thighs, and core.