Purpose: To measure values for functional reach (FR) and lateral reach (LR) in school children with knee joint hypermobility (KJH), and to examine the correlation of anthropometric measures and KJH with FR and LR values.
Methods: A total of 140 children aged 6 to 12 years with typical development (TD) and bilateral KJH of greater than 10° hyperextension participated. Three successive trials of FR and LR tests in standing position with feet shoulder width apart were performed, and the mean of the 3 trials was calculated. Analysis of variance and Bonferroni tests were used to analyze correlation and association of FR and LR values with KJH angle and anthropometric data, respectively, with a 95% confidence interval.
Results: In school-aged children with TD, height and KJH contributed significantly to the FR values in both genders, whereas height contributed for LR values among girls alone.
Conclusions: Height and KJH affect children's scores on the FR and LR tests of balance.