Inclusion Criteria:  Body mass index percentile equal to or greater than the 95th percentile All did not receive strength or balance training or involvement in competitive sports emphasizing muscular strength. All participants had balance deficiency and mobile flat foot. 25(OH) D was ranged from 10-20ng/ml  Exclusion Criteria:  Injury to the lower limb required medical care. Deformity of or surgery in the lower limb. Visual impairment, or neuromuscular disorders. Engagement in obesity treatment programs, three months prior to the study. Epileptic fits Thyroid medications Autoimmune disease Take calcium or vitamin d3 supplements, medications for osteoporosis