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In vitro single muscle fiber size and mechanical characteristics of vastus lateralis. Values are means±standard error. (A) Average fiber cross-sectional area. (B) Maximal isometric force. (C) Specific force. (D) Maximal shortening velocity. *Significantly different from male individuals (P<0.05). a)Significantly different from type I fiber (P<0.05). b)Significantly different from type IIa fiber (P<0.05). c)Significantly different from type IIa/IIx fiber (P<0.05).
