Food Intake, Body Weight, and Behaviour.

<p><b>A,</b> average body weights for each group at the end of each feeding treatment. <b>B,</b> average daily food consumption for each group across days. Note the sharp peak in rebound feeding after a return to ad libitum. However, both the initial reduction and subsequent rebound in feeding had no effect on body weight across conditions suggesting internal metabolic compensation/protection against food restriction. <b>C,</b> average daily values for ambulatory activity during the time of meal anticipation (ZT4–8). Note that FAA develops slowly over several days as the animals entrain to their new feeding schedule but sharply declines back to baseline values on day 15 after being returned to <i>ad libitum</i> feeding. <b>D,</b> nocturnality scores for animals during RF and subsequent AL feeding. Nocturnality is defined as the total ambulatory activity at night divided by total daily activity. <b>E,</b> average waveforms of all animals during the last week of restricted feeding. Note the sharp increase of FAA prior to meal presentation. <b>F,</b> average waveform during the third day of <i>ad libitum</i> feeding, The anticipatory peak and the increase in night time activity was completely abolished after a return to <i>ad libitum</i> feeding, although daytime activity did appear to remain slightly higher than AL controls. Note: 1 hr MA represents a smoothed curve where the moving average, the average score for all data points within the hour surrounding each time point, was plotted. Gray bars indicate the time of food availability and black triangles indicate the first day of ad libitum feeding.