Free corticosterone concentrations between stress treatments (panel A), and percent change from 0 h post-stress among fluid conditions in restraint (panel B) or shock (panel C) stress treatments. Blood was collected for analysis immediately before the acute stress session, and 0, 3, and 6 h following the acute stress session. Animals received either inescapable and unpredictable shock (S) or simple restraint (R). Following the stress session, animals were given 18-h free access to a 40% glucose cocktail (G), 40% fructose cocktail (F), or water (W). Shocked animals exhibited higher concentrations of free corticosterone immediately after the stress session (0-Post). Error bars denote mean ± SEM. *** p < 0.001 (comparison: Restraint, Shock).