Receive one pair of the bands, the 117 page manual, DVD showing different drills.

For balance, the body uses a principle called reciprocal inhibition which means if one muscle is weak compared to its counterpart, then the body is only as strong as its weakest muscle in that joint. With sprinting, the hip flexor muscles are weaker than the buttock and 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 is labeled the thrusting leg. The action of bringing the leg forward to thrust again is labeled the recoiling leg. 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. Strengthen the body’s ability to recoil the leg and save the energy in the thrusting leg, you can achieve a higher running velocity.  Shorten the leg for more speed! In physics a shorter lever always generates more speed than a longer lever.

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