Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

Let me say this straight — six pack abs are not built by doing 50 crunches once a week. They’re built through discipline, consistency, pain, sweat, and a lifestyle that doesn’t negotiate with excuses.