1. Lay, face up with back on a flat bench. flex toes toward shins, and bring legs straight up to sky.
2. As you inhale, lower the legs toward the ground, stopping when the lower back fails to keep contact with the bench through the lower back.
3. Exhale as you bring the legs back up toward sky. Bend knees as you start to fatigue, keeping belly button pulled into spine and back flat with bench.
