Effect of ENF on physiological variables. (A) Cumulative food intake during ZT 12–18, ZT 18–24, and ZT 0–12 and daily intake (ZT 0–24). The food intake was obtained by subtracting the amount of food remaining at the end of each term from the amount offered at the beginning of each term. (B) Body weight gain during a period of 4 consecutive days, with or without ENF. The body weight gain was calculated from the body weight values before (day 0) and after treatment (day 4). The body weights were measured at ZT 12 on day 4. All of the values are expressed as the mean +/- SEM (n = 6). *p < 0.05 for the ENF group compared with the FF-control group.