TRX Suspension Training system uses bodyweight and manipulates gravity using the leverage of various positions to improve muscular strength and endurance. For optimal development of strength and definition the repetition range should be between 6-12 with the muscles fatiguing by the 12th repetition. For optimal development of muscular endurance and joint range-of-motion, the repetition range should be between 12-20.TRX starting the program complete each exercise or stretch for 1-3 sets resting between each set before moving to the next exercise. To increase the intensity TRX FORCE Kit turn the routine into a circuit and complete one exercise right after the other and rest for 2-3 minutes after the completion of one circuit .