Born in the Navy SEALs, TRX® Suspension Trainer Born in the Navy SEALS, TRX Suspension Trainer utilizes one’s own body weight to develop strength, balance, flexibility and core stability simultaneously. Using gravity and leveraging your own  body weight to perform hundreds of exercises for a full body workout every class. You're in control of how much you want to challenge yourself on each exercise - because you can simply adjust your body position to add or decrease resistance.