Fig. 2. Example of wheel-running as collected by the automated system for a selection-line female (filled circles) and a control female (open circles) during an hour of peak wheel-running activity and the 5-min observation period used for videotape microanalysis (filled bars). The four deceleration events from the wheel of the selection-line female suggest that she may have stopped running during these times, although the automated system recorded continuous activity over the hour. The wheel of the control-line animal clearly stopped rotating at least twice during this hour.
