Distance traveled (A), time ambulatory (B), ambulatory episodes (C), time vertical (D), and time stereotypic in response to chronic caloric restriction (E and F), 70% caloric restriction for 8 wk (shaded bars), or ad libitum feeding (open bars) in OP, OR, and SD rats in specific time intervals across the 24-h measurement period. *P < 0.05 compared with ad libitum feeding within the same group; n = 9–10/group. Values are presented as means ± SE.