it's time for aerotrainer, with your weight and health? tell your doctor a more effective total body fitness solution. (announcer) aerotrainer's ergodynamic design and four patented air chambers create maximum muscle activation for better results in less time, all while maintaining safe, correct form and allows for over 20 exercises. do the aerotrainer super crunch. the pre-stretch works your abs even harder, engaging the entire core. then it's the back extension, super rock, and lower back traction stretch to take the pressure off your spine and stretch muscles.