Fig. 6. Wheel-running speeds are greater in selection-line females (filled symbols) than in control females (open symbols) when measured by direct observation during videotaping (A; mean bout speed, N=41) or when estimated for all females of generation 23 using computer-recorded data (B; maximum speed in any 1-min interval, N=268). In B, squares designate videotaped animals. In some selection-line females, mean bout speed and maximum speed in any 1-min interval are near or above the predicted maximal aerobic speed [predicted for a 28 g animal from Fig. 6 of Koteja et al. (1999)] on a running wheel (dashed line).
