In much the same way that a species of life figures out how to survive in a changing environment by evolving blindly through random mutation and natural selection, the running stride evolves through repeatedly confronting speed and endurance limits—through crises that challenge the neuromuscular system to come up with novel movement patterns that yield more speed and endurance. You just have to run hard, without thinking about it, and let the process happen. Consciously fiddling with your stride in the hope of accelerating its evolution toward greater efficiency not only can’t help but is
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