90 Degrees

A great exercise for the abdominal muscles and that often sought after six pack is something called the Double Crunch. Note that a crunch involves lifting your body slightly off the floor rather than doing a full sit up. I did it in a fitness class today. Here's how you do it:

Lie back on a floor or mat with knees bent and hands behind head. Keep elbows back and out of sight. Lift knees to 90 degrees- this insures the hips aren't being brought into the exercise and so your abdominal muscles are doing the full work. The 90 degrees approach is generally a great idea with many abdominal exercises for this reason. Start by leading with the chin and chest towards the ceiling, contracting the abdominals and raising shoulders off the floor or mat. During the crunch, also bring knees towards chest and return to start position.

Ok, go try it out and see if it works for you.