Fig. 2

Effect sizes of the changes in the performance of the trained balance task ordered by age group and number of training sessions. Filled symbols: p < 0.05. N.A., not applicable: there were no data reported for the improvements in the performance of the trained balance task. These data are shown for sake of orientation and not meta-analyzed. Note how the increase in the number of balance training sessions is not accompanied by a dose-dependent increase in the effect sizes