The original article (below) on the topic at hand, was published in Biomechanics of Distance Running in 1990. As you read the data and conclusions from this research you’ll see that the scientific community was not ready to accept the idea of the role of gravity as a leading force in running. A classical vision of gravity strictly as a vertical force was predominant in the scientists’ minds and didn’t allow them to look at the facts from a different perspective. The most important thing there, a relationship between extensor muscles and gravity as one non-conflicting system with reciprocal coordination…