, vol. 7, issue 3, 2014.
Purpose: to examine the effects of high frequency, low magnitude vibration on bone density and
muscle content in children with Down syndrome.
Design: Experimental study (randomized control trial)
Subjects: Thirty children with DS from both sexes, ranging in age from 4 to 7 years. They were
divided randomly into two groups of equal number A (control) and B (study)
Procedure: Evaluation before and after three months of treatment for each child of the two groups
was conducted via using dual X-ray absorptiometry (DXA). Group A received a selected exercise
program, while group B received the same exercise program given to group A in addition to
proprioceptive stimulation in the form of whole body vibration (WBV) training.
Results: Significant improvement was observed in the two groups when comparing their pre and
post-treatment mean values. The mean ± SD of BMD post treatment for control group was 0.75 ± 0.03
and that for study group was 0.79 ± 0.03. The mean difference between both groups was -0.04. There
was a significant difference between control and study groups in BMD post treatment.
Conclusion: mechanical vibration seems to improve BMD and muscular content in DS children
making the treatment of osteoporosis possible.
