The single-leg abdominal press is another popular core-strength exercise. To do this exercise: Lie on your back with your knees bent (top illustration). Keep your back in a neutral position, not arched and not pressed into the floor. Avoid tilting your hips. Tighten the abdominal muscles.

A single-leg abdominal press is another popular core-strength exercise: Lie on the back with the knees bent. Keep the back in the neutral position, not arched & not pressed into the ground. Avoid tilting the hips. Tighten the abdominal muscles. Raise the right leg off the ground so that the knee, as well as hip, are bent at 90-degree angles.

Raise your legs off the floor one at a time so that your knees and hips are bent at 90° angles (Photo 2, 3). Push your hands against your knees while pulling your knees toward your hands, which will engage your abdominal muscles (Photo 4). Keep your arms straight! Hold for three deep breaths. Repeat ten (10) times per set.