uphill sprinting

The Frappier system, being true to its high-tech principles, tends to eschew nature’s hills for mechanised ones. But uphill sprinting, wherever it takes place, is a great way to develop speed. For best results you need a 30% gradient, which will optimally overload the ankle dorsiflexors and plantarflexors, the knee flexors (during the swing phase), the knee extensors and the hip extensors and flexors.(2) This degree of incline also results in greater range of motion at the hip and ankle, faster joint motions during push-off and 2-3 times greater neuromuscular activity in the hip and knee extensors.