Outdoor Fitness clients swear by this exercise. TVA stands for the main muscle you are targeting: the transverse abdominus. The beauty of this abdominal muscle is it lies deep within the core muscles. It’s a “stability” muscle, which if it’s trained efficiently, can and will flatten that dreaded “pooch” that happens after pregnancy or through the aging process. Gravity and the process of living cause our innards to droop outward—thus, the pooch. But this is not your destiny. You can tighten the muscles just like a natural girdle, to pull everything back in, for a tight, flat abdominal wall—FLAT from the pelvis to the ribs!