If you're looking for a new move to master, give the standing trunk rotation a shot. PS, There’s More. PS, There’s More. 11 Core-Stability Exercises That Do More For Your Abs Than Crunches ...

I was doing an at-home workout the other night and didn't like one of the ab exercises the trainer had listed for the oblique muscles, so I decided to swap it out with a side-lying crunch. It's ...