Fig. 1. Metabolism versus speed plots for individual horses. Trotting values (open symbols) and galloping values (filled symbols) on the level (circles) and up a 10% incline (triangles). The horizontal gray bars represent the range of transition speeds from the maximum sustained trotting speed (left end of the bars) to the minimum sustained galloping speed (right end) on the level and on the incline. The energetically optimal transition speed (EOTS) occurs where the lines for trotting and galloping intersect. In all cases, the minimum sustained galloping speed was faster than the EOTS.

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