Thanking Donny for bring this interesting subject up.
Might suggest doing vacuum's bending over at a 90 degree angle, hands on the legs. A little different approach. Most Yoga classes will include a series of vacuum/breathing exercises. Sitting ,standing, kneeling or at a 90 degree angle, the point is to draw in the ab wall from just under the rib box to below the bellybutton. The basic idea is try to bring the ab wall nearer the spine a possible, with a slight hold of 5 to 10 seconds. Some of these exercises/reps are preformed rather fast and hard (more advanced). Most are preformed at a slower pace. (if anyone has preformed the Yoga exercise "Breathe Of Fire" you may understand the affects of rapidly preformed vacuum's has on the blood circulation, lungs and all around good feeling..plus the ab wall)
Can include muscle control exercises like the roll ab roll, giving a wave affect, from top to bottom. Or preforming the (muscle control again) ab rope exercise. First a total ab hold and than the right and left isolation exercise. Both of these require a vacuum when doing them.
Have been told that quite a few can reduce the inner fat cells, around/in between the ab wall, giving a smaller waist measurement. Yoga teaches that the digestions will be improved greatly, as will any stomach problems for some. Also sexual strength improves. In any event, vacuum's and ab rolls/holds may be worth a try. Good Luck.
