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Fig. 8. (A) Mean sum of the positive increments in mechanical energy
(Epos) of both tarsometatarsal segments as a function of
treadmill speed, in the unloaded (closed symbols) and loaded (open symbols)
segments. Circles, total Epos over the whole stride;
triangles, Epos for swing phase only. (B) Mean mechanical
power of the unloaded (closed circles) and loaded (open circles)
tarsometatarsal segments, calculated by dividing total
Epos for the stride by the stride duration. Values are
means ± 1 s.e.m. (N=6).