Running barefoot -- the most important muscles to use

In an interview I read today, Usain Bolt's coach, Glen Mills, talked about what helped make Usain Bolt the fastest man in the world. He revealed something that will surprise most runners, namely, the most important muscles required for fast, efficient running. Have a guess? Think it's the quads? The hamstrings? Glutes? Calves? Eyelids? Let me quote Glen: Usain is an extremely gifted athlete. When I started working with him, one of the things that stood out like a sore thumb was his poor mechanics. Part... Read full post here