TRAINING EXPLOSIVE FORCE AND SPEED: Run faster, jump higher and dig harder with a resistance trainer that builds speed, strength, agility, flexibility, dynamic power and overall balance. Build strength and explosive force as you take your physical skills to the next level. VERSATILE TRAINING: Ideal for all athletes and active individuals for personal or team exercises to enhance leg, calf, back, chest, shoulder and core strength. Great for football players, runners, crossfit practitioners and basketball players. SPEED & AGILITY RESISTANCE SET: Offers up to 80 lbs of resistance for use in agility and strength exercises. Original lengths available in 16.6 ft, 9.8 ft, and 6.6 ft options. The stretch cord can extend up to 3 times the original length. BEST WAY TO USE: It is recommended that the athlete uses a partner to add challenge by applying resistance. Individual training is also possible by securely attaching it to a stable, grounded object. MAXIMIZE YOUR POWER: The resistance trainer is used by athletes worldwide who want to become faster, stronger and more agile. It helps athletes train to maximize strength, speed and vertical jump performance.