Summer is right around the corner, and if you're looking for a challenge—and a six-pack—Jeff Cavaliere, C.S.C.S., of Athlean-X has you covered with an ab workout that’s built for all fitness levels.

In the quest for a sculpted six-pack, it can be easy to get caught up in long, intense gym sessions. But, your abs don't need much more than a clean diet and a quick beating in the gym from time to ...