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Mass-specific muscle work (J kg–1) performed by the LG, MG and SDF during walking (averaged for 1.0 and 1.5 ms–1) and trotting (2.5 ms–1) across the three grade conditions. Net work output increased in all three muscles as a function of grade, and was greater within the LG and MG than in the SDF (Table 2). Values shown are means ± s.e.m.
