Weight of maternally separated rats with (MSR, n = 10) or without (MSNR, n-10) access to running wheels and weight of the non-stressed rats with (NSR, n = 9) or without (NSNR, n = 10) running wheels. Repeated measures ANOVA revealed no significant difference between the weights of maternally separated and non-stressed rats. However, at the beginning of week 2 (P60), the MSR rats weighed significantly less than the maternally separated rats that did not have access to a running wheel. *(MSR vs MSNR, p < 0.01, week 2).