In all, 29 children fulfilled the inclusion and exclusion
criteria and were randomly assigned to either the IG (n0
15) or the WLC (n014). Computer-aided randomization
was performed by a person who was not involved in the
study. One child did not complete the training because of a
broken leg. According to an intent-to-treat approach and
because the number of participants was so small, the data
for this child were included in the further analyses