Supine Alternating Leg Extensions

How to do it

1. Lie on your back with both knees bent over your hips and your hands resting at your sides.
2. Press your lower back into the floor and brace your abs.
3. Extend one leg out long, lowering it toward the floor without touching.
4. Return that knee over your hip, then extend the other leg.
5. Alternate legs at a slow, controlled pace.