Do Suspension Training Workouts Build Muscle? Suspension training, or TRX training, is training that causes you to suspend from a rope, challenging your body to keep you stabilized. And, while these exercises may look easy, they pack a big punch when it comes to building muscle. This style of resistance training was invented by a Navy Seal who needed to take his workouts wherever he went. He used his belts to perform push-ups, crunches, chest workouts, leg workouts, working his…