Figure 5.

Average leg movement rate of infants, calculated as number of movements per hour of awake time (average of right and left legs). Each visit is shown as a round marker. Each line represents a typically-developing infant across three visits. Lines are shown for ease of viewing and are not meant to imply a linear fit across visits. Data were collected at three time points only, as indicated by a round marker for each infant. Data are plotted in relation to how many months before walking onset (WO) infants were assessed. Onset of walking occurred between 9 and 18 months chronological age.