Voluntary wheel running produces resistance to inescapable stress-induced potentiation of morphine conditioned place preference.
Rozeske RR, Greenwood BN, Fleshner M, Watkins LR, Maier SF. Voluntary wheel running produces resistance to inescapable stress-induced potentiation of morphine conditioned place preference. Behav Brain Res. 2011 Jun 01; 219(2):378-81.