TRX is a suspension training program designed to work every large muscle group. A TRX suspension strap hangs from the ceiling and is used throughout the hour, whether you're gripping it with your hands or hooking the straps on to your feet. Classes start with a warm-up that was just enough time to wake up your muscles and give my heart rate a boost. TRX training is great for the entire body and provides an intense upper body segment that targeted the biceps, triceps, shoulders, chest, and back. Some of the moves are exclusive to TRX, some are reminiscent of exercises you might do with weights, and some are back to basics, like push-ups. All are extremely effective. Each segment is broken up with cardio drills like high knees, quick feet, and jumping jacks. This provides a phenomenal workout.