The TRX System, also known as Total Resistance eXercise, refers to a specialized form of suspension training that utilizes equipment developed by former U.S. Navy SEAL, Randy Hetrick. TRX is a form of suspension training that uses body weight exercises to develop strength, balance, flexibility and core stability simultaneously. It requires the use of the TRX Suspension Trainer, a performance training tool that leverages gravity and the user’s body weight to complete the exercises.