KnockOut Abs&reg; Anti stress speed punching bag with sit up bench for an intense ab workout Knock Out Abs sclupts your abs and obliques while you have fun punching a speed bag and relieve stress. It's the best workout ever especially those who gave up tedious sit-ups, are too busy to go to the gym, or want intense ab workout to get quick results. You can add resistance to your punch with included training tubes. Workout DVD provides more challenging punching and tube training routine. Not only for men, it's also popular among women who want to get rid of arm flab and children who want to develop physical strength. Great workout equipment for the entire family.