 Abdominal
Vacuum
Here is a potent and frequently overlooked exercise.
Stand with hands on hips. Exhale completely. Draw in stomach as far as possible.
Feel the tension powerfully in your abdominals. Hold for a count of five.
Do 10-20 repititions.
A variation on this is to expand your chest at the same time you draw
in your stomach (it is possible to expand the chest, even after a complete
exhalation).
This exercise can also be performed while sitting or lying down. It is
an excellent exercise to perform in the car while stopped at trains and
during other wasted moments. | 
