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Effect of treadmill exercise on the expression of caspase-3 in the spinal cord. (A) Sham surgery group; (B) sham surgery plus exercise group; (C) spinal cord injury (SCI) group; (D) SCI plus exercise group. Data are presented as the mean ± standard error of the mean. *P<0.05 compared with the sham surgery group, #P<0.05 compared with the SCI group.
