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Figure 2


Fig. 2. Mean normalized electromyograms (EMGs) from six dogs when they trotted with 12% of body mass carried in a backpack located over their pectoral girdle (i.e. anterior-trunk loading manipulation). For each muscle, the black line represents the average EMG when the dogs trotted on the level without added mass (control) and the gray line represents the average EMG when the dogs carried the added mass. For each dog, the trotting speed was the same during the control and added mass trials. The error bars are the standard error of the mean for each sampling bin.





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