In a full verticul crunch, you really work the abs by involving both the upper and lower body, making this the 8th most effective exercise for the rectus abdominis.
How to:
How to:
- Lie on your back and extend the legs up towards the ceiling.
- Place hands behind your head (lightly cupping it) and contract the abs to lift the shoulder blades off the floor.
- At the same time, press the heels towards the ceiling, creating a 'u' shape with the torso.
- Lower down and repeat for 12-16 reps.
source: exercise.about.com
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