Fig. 3. Effect of averaging interval on maximal values of running speed (A) and oxygen consumption (B) in 40 Mongolian gerbils during voluntary wheel running. Broken lines indicate regressions of 2- (open circles) and 5-min averages (filled circles) against 1-min averages (regressions were forced through the origin). Slopes are fractions of 1-min values; for example, a slope of 0.834 indicates 83.4% of the 1-min value. The solid line shows a slope of 1.0 (equivalent x and y values).