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Changes and differences of total Tc and total Dm. (A) Tc of biceps femoris. (B) Tc of rectus femoris. (C) Dm of biceps femoris. (D) Dm of rectus femoris. Tc, contraction time; Dm, maximum radial displacement; ns, not significant; CON, control group; SWG, slow walking group; MWG, moderated walking group; FWG, fast walking group. *P≤0.05. **P≤0.01.
