Exercise No. 2: Hanging leg raises

Performing this movement requires the use of a horizontal bar from which to hang, e.g. a doorway chinning bar. Your grip should be slightly wider than shoulder width.
Bend you knees and try to raise your legs as high as possible (you should aim to touch your chest). Do not keep your pelvis completely straight for this exercise, for then other muscle groups apart from the abs come into play.
Keep your pelvis area curled slightly upwards during the whole movement (see diagram) this ensures pressure on the abs. Hold the raised position for a couple of seconds (keeping abdominals "tight") and then lower your legs.
To ensure correct and most effective form, make sure that you don't "swing" your legs up. Keep the movement slow and controlled let your work.

Absolute definition, sponsored by ripfast