Concept of how the Speed Trainer works

The body must be in balance. It works the best if all opposing muscles are balanced in strength. The body uses a principle called reciprocal inhibition. This means if one muscle is weak or under developed compared to it’s counterpart, then the body is only as strong as it’s weakest muscle in that joint. The weak muscle may shut down the strong muscle so the body will not harm itself. The body is also more prone to have a weak muscle spasm in order to compensate for it not being strong enough compared to it’s counterpart. In the case of sprinting, the hip flexor muscles are not as strong as the buttock muscles or hip extension muscles. This means that the body can run only as fast as the strength of the weakest muscle. In sprinting, the action of the leg pushing off or propelling the body is labeled the thrusting leg. The action of bringing the leg forward into position to thrust again is labeled the recoiling leg. The inventor of the Speed Trainer has mathematically proven that you can only run as fast as you can put your leg out in front of you. With Speed Trainers, you can use your legs faster than you thought possible. Speed Trainers concentrate on and add resistance to the recoiling leg.

The graph shows an actual sprint of five seconds and demonstrates how hard each leg is working. Even though the sprint starts out with the thrusting leg working harder than the recoiling leg, the recoiling leg reaches its maximum ability to accelerate, which dictates the runner’s maximum velocity. By strengthening the body’s ability to recoil the leg while maintaining the energy reserve in the thrusting leg, one can achieve a higher running velocity. Speed Trainers work to improve the maximum operating limits of both the recoiling and thrusting leg, thus increasing acceleration abilities, speed and endurance.