eyestone

Ed Eyestone, a two-time Olympic marathoner and men's cross-country coach at Brigham Young University, has a master's degree in exercise physiology.

这组渐进式乳酸门槛跑的关键理若干英里逐级递增的配速。这样为了训练你在跑步初保持耐心，而教会你如何在双腿疲劳的时候跑得更快。