Fig. 1

Relationship between mean offspring (G₂) running distance (revolutions/day) and mean maternal (G₁) running distance. G₂ values represent the means of days 5 and 6 of a 6-day wheel exposure at ~9 weeks of age. G₁ values are the averages of days 33 and 34 of wheel access. The G₁ running trait values are approximately age matched to the values of the offspring. Pearson partial correlations (r; controlling for sex) revealed a statically significant relationship between the two running variables (p = 0.031, r = 0.282)