Figure 2.

Effect of treadmill exercise on the expression of neurotrophic factors (NGF, NT-3 and IGF-1) 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. NGF, nerve growth factor; NT-3, neurotrophin-3; IGF-1, insulin-like growth factor-1; O.D., optical density.