Group mean values of the peak power, peak power frequency (PPF), and mean power frequency (MPF) of the center of mass acceleration (COM_acc).

<p>Group mean values of the unnormalized peak power (<i>a</i>), normalized peak power (<i>b</i>), peak power frequency (<i>c</i>) and mean power frequency (<i>d</i>) of the COM_acc for each age group and visual condition. <i>White</i> and <i>black bars</i> indicate the results for child and adult groups, respectively. Data are group means ± SD. *, **, and *** indicate statistical significances of <i>P</i> < 0.05, <i>P</i> < 0.01, and <i>P</i> < 0.001, respectively, between age groups. # and ## indicate statistical significance of <i>P</i> < 0.05 and <i>P</i> < 0.01, respectively, between visual conditions.