This system offers a fusion of strength, balance and flexibility for people of all fitness levels; the most effective core conditioning system available anywhere. Born in the Navy Seals; Devised as a training device for the Navy Seals, the TRX System was designed to deliver that level of fitness- to anyone, anywhere. "When they told me it was invented by a Navy Seal I knew it would be cool...It's just your body weight working against gravity you won't get injured. Now my wife uses one at home, and I'm addicted". Drew Brees N.O. Saints QB