69 下樓梯時,載重肢體的股四頭肌(quadriceps femoris)必須做何種形式的收縮?
(A)向心等張收縮(concentric isotonic contraction)
(B)向心等長收縮(concentric isometric contraction)
(C)離心等張收縮(eccentric isotonic contraction)
(D)離心等長收縮(eccentric isometric contraction)

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統計: A(2), B(6), C(5), D(0), E(0) #1277097