TRX Suspension Training System in Place Published Jan. 17, 2013 By 452 AMW 452 AMW MARCH AIR RESERVE BASE, CALIF. -- Staff Sgt. Brandon Lopez, 452d Force Support Squadron, participates in the gym's new TRX Suspension Training System certification course at the March Gym, Jan. 4. The 20-foot suspension system allows the user to work upper and lower body as well as core muscles using his or her own body weight by hooking TRX straps to the suspension frame and performing various strength workouts.