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Effects of stress and running on proliferation and survival. a) Experimental timelines (see methods for details). b) Twelve days of running significantly increased proliferating cell number, an effect that was no longer significant after 19 days of running. c) Both running and restraint stress enhanced the survival of new neurons to 14 days of age. Only running enhanced survival of new neurons to 21 days of age. *p<0.05 versus control at the same time point.
