Fig. 2: The effects of running exercise on the depression-like behaviors of CUS rats.

a The body mass changes in nonstressed group (n = 23), stressed group (n = 17) and stressed + running group (n = 20) at different stages (mean ± SD). **p < 0.01, when the body mass of the stressed group and stressed + running group are compared with that of the nonstressed group. b The sucrose preferences of nonstressed group (n = 23), stressed group (n = 17) and stressed + running group (n = 20) at different stages (mean ± SD). **p < 0.01. CUS chronic unpredictable stress.