The Acceleration Speed Cord is a great training tool for all athletes to gain and produce optimal levels of acceleration to rapidly create speed and move faster multi-directionally in all sports. Versatile training: Ideal for all athletes and active people personal or team exercises to enhance leg, calf, back, chest, shoulder and core strength. Great for football players, runners, crossfit practitioners and basketball trainers. You can use it for parachute drills, and it is perfect for pulling a tire and pulling a running sled for mid body resistance. It can be also superfun to make a fool of yourself playing around with. Maximize your power : The resistance trainer is used by athletes all over the world who want to become faster, stronger, and quicker runners. It can also helps athletes train to maximize strength, speed, so that they can become their best. Made with premium durable nylon that will last years of intense training. If you need to improve running speed and strength training.It is Definitely worth the purchase!