Effect of Whole-Body Vibration Training on Standing Balance and Muscle Strength in Children with Down Syndrome.

Objective The purpose of this study was to determine whether whole-body vibration training could improve standing balance and muscle strength in children with Down syndrome. Design This study was a randomized controlled trial studying 30 children (8-10 yrs old) with Down syndrome. They were assigned randomly using sealed envelopes, with 15 children allocated to the control group (9 boys, 6 girls) and another 15 children allocated to the study group (8 boys, 7 girls). The control group received a designed physical therapy program, whereas the study group received the same program given to the control group in addition to whole-body vibration training. Both groups received the treatment sessions three times per week for 6 successive months. Measurement of stability indices by using the Biodex Stability System as well as muscle strength of the knee flexors and extensors by using a handheld dynamometer was done before and after the 6 mos of the treatment program. Results Each group demonstrated significant improvements in stability indices and muscle strength after treatment (P < 0.05), with significantly greater improvements seen in the study group when compared with the control group (P < 0.05). Conclusions Whole-body vibration may be a useful intervention modality to improve balance and muscle strength in children with Down syndrome.