Fig. 3.

Regression analyses between % change in body mass [(Post − Pre)/Pre] × 100 and exercise. Values for the entire population (black), the leanest 25% (green), and the fattest 25% (pink) (based on Pre exercise values) are shown. Exercise traits were mean running distance (revolutions/day), duration (i.e., cumulative 1-min intervals in which at least 1 revolution was recorded), and average speed (total revolutions/time spent running) on days 5 and 6 of a 6-day test. In A–C the sexes are pooled in each of the 3 groups, while in D–F the regression results are sex specific (dashed line denotes females, solid line denotes males). Conditional slopes and r² were controlled for sex, parent of origin, and food consumption. Individuals with a positive % change gained mass as a result of 6 days of wheel access. Running wheel circumference was 1.1 m.