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Velocity during active shortening (positive values: level, black; 10% incline, blue; 15% incline, green; 20% incline, red) and active lengthening (negative values) in the ILPO as a function of speed. A significant effect of speed and incline was demonstrated for active shortening velocity. The velocity during active lengthening was not significantly different across slopes, but there was a significant effect of speed. Error bars indicate ±1 s.e.m.
