Begin lying on the floor with your hands at your head and your legs straight on the floor. Lift your torso off the floor and ...

I like to do these seated on a box or bench, with my arms ... from seated will seriously ramp up the intensity on your quads, core, and hips. Are sitting ab exercises effective?

Perform the sit-up with your feet elevated on a bench or step. This variation increases the intensity of the exercise by adding more resistance to strengthen the core. Lie on your back with your ...