It's never a bad time to get excellent abs. This instructional video demonstrates how to exercise your lower abdominal muscles with hanging leg raises. This routine is especially effective because it maximizes spinal flexion and extension. The focus of the exercise should be about rolling the hips up to generate an abdominal contraction, then returning to a good lumbar curve to relax and stretch out the abs. A good stretch at the end range of motion allows for a better workout and builds flexibility. The speed of the contraction should be controlled. It's especially important to have definite beginning and ending points for your range of motion. Holding the contraction for a couple seconds makes the exercise even more intense.