Train with a friend or coach - one will act as resistance and the other will try to accelerate as quickly as possible. Traction training develops muscle strength, endurance and body control. In addition to running, the set also works to perform various support movements, for example, try stepping on the box with resistance. An excellent tool for football players, cross-fitters and other sports enthusiasts. The rope is flexible, so it doesn’t make sudden jerks, but offers steadily increasing resistance.