Lay down on the floor on your back with your hands either behind or above your head and your legs slighly bent.
STEP 2
Lift both of your legs up at the same time towards your chest.
STEP 3
Return to the start position and repeat. Make sure you don't arch your back as you lower or raise your legs.
STEP 4
Repeat entire movement for the desired number of repetitions.
Special Notes
If your back is arching too much that means you have raised or lowered your legs too much. Your lower back should maintain contact with the floor at all times throughout this exercise. To increase the level of diffuculty, straighten your legs a bit more (but not completely straight) and perform this movement or put on some ankle weights.