This exercise is a modified version of the crunch. It focuses on working the ab muscles, as well as the legs (hip flexors) and lower back.
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Instructions
- Start this exercise by lying down flat face up on a mat.  Your elbows should be out, and your hands behind your head.  

 - Slowly move legs straight up off the floor towards your head.  Make sure to keep your abs on and your legs as straight as possible.   

 - Once toes are pointing towards the ceiling, slowly move legs back down to the floor.   Return to start position and finish reps.  

 - Recommended reps: Start with 10-12 reps and increase as you progress.
 
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