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Group mean ± s.e.m. knee joint mechanics for walking (a–d) and running (e–h). Knee joint power (a,e), knee joint angle (b,f), knee joint net moment (c,g) and knee joint angle–moment plots (d,h). Solid lines, CS and dashed, ACC. The vertical lines in panels (a–c) and (e–g) indicate the end of the stance phase for CS (solid line) and ACC (broken line).
