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Average (S.D.) mechanical work of individual legs during step-to-step transitions. (a) Mechanical work of the trailing leg (Ptrail) during the step-to-step transition at each slope and velocity. Ptrail was more positive with increasing slope from −9° to 9° and at faster velocities. (b) Mechanical work of the leading leg (Plead) during the step-to-step transition at each slope and velocity condition. Plead was more positive with increasing slope from −9° to 9° and at slower velocities.
