Hill Sprint Training To execute this workout outdoors, first you need to find a steep hill with decent footing so you are not dodging roots and rocks and can sprint flat-out. The steeper, the better for our purposes. It should be at least 10 percent or a one-in-ten slope with 20–50 percent (two- to five-in-ten slope) being even better. A steep stadium can provide the needed steepness. If your movements are slow and cautious due to poor footing, you will not get the desired effect. The steep hill allows those who can’t run fast to impose very high loads on their legs and
absolutely important during base building
