"Get Six-Pack Abs with These 2 Essential Exercises, Says Top Trainer"

According to strength coach Jeff Cavaliere C.S.C.S., the corkscrew and upper circle crunch are the two key movements needed to work both the upper and lower abs. For a more advanced fitness level, Cavaliere recommends adding weight or trying a hanging version on a pullup bar. However, he points out that neither of these exercises will lead to a visible six-pack unless you are first making sure that you're getting your nutrition right.