Corenswet's physical trainer breaks down the routine that helped the formerly svelte actor put on 40 pounds of muscle—and how ...

Lie down on the ground, and drive your lower back into the floor. Hold a light weight plate or dumbbell in both hands. Lift your legs off the floor just a few inches. At the same time, extend your ...

The Superman lift works the same way ... rather than sitting up fully. Given who this ab workout is programmed for, I was under no illusion that this would be easy — and it was far from it.

To do the Superman exercise: Lie on your belly on your exercise ... but is great at working the abdominal muscles and the lower back. For this exercise, the additional movement of the legs in ...

A 4-Point kneeling superman is another great ab exercise you can do without having to worry about a back injury. You’ll see ...

A 31-day core workout experiment reveals how just five minutes daily strengthens more than muscles, offering lessons about ...