Lying Floor Knee Tuck.

Make every rep count.

1. 01

   Lie on your back with legs straight. Slide your hands under your lower back/hips for light support and keep your lower back gently pressed down.

2. 02

   Brace your core, then exhale as you bend your knees and draw them up toward your forehead. Focus on curling your pelvis up slightly—no swinging.

3. 03

   Stop when your abs are fully engaged and your thighs are just past parallel.

4. 04

   Inhale and lower your feet back down slowly with control until your legs are straight again, keeping tension in your abs the whole time.

5. 05

   Repeat for the prescribed reps.