- Lay on your back with your knees bent, feet flat on the floor.
- Reach one arm straight up towards the ceiling, while the other arm is relaxed across your chest.
- Sit-Up just far enough so that your shoulder blade of your extended arm comes off of the ground.
- Alternate with the other arm every 5 reps
Muscles: Upper abs, rectus abdominis, internal obliques, external obliques
Make it Harder: Hold a dumbbell in the extended arm.