Children had Down syndrome often have impaired balance and postural control and result as less active than their peers that can lead to reduced quality of life and movement skills. Effects of physical activity may be important in preventing falling risk and health consequences in those children

Sixty children from both genders (boys and girls) participated in this study, their ages ranged from 10 to 16 years and they were randomized into three groups of same number (A, B and C). Groups (A) received conventional physical therapy program, group (B) received the same conventional physical therapy program of group (A) and core stability exercises while group (C) received the same conventional physical therapy program of group (A and B) and whole body vibration exercise

Inclusion Criteria:

• Aged between 10 to 16 years.
• Able to recognize commands given to them.
• Understand our verbal command and encouragement.
• Stand and walk independently without repeated falling.

Exclusion Criteria:

• Children with any neurological (signs of epilepsy and instability of atlantoaxial joint).
• Musculoskeletal, or mobility disorders.
• Cardiac anomalies.
• Vision or hearing loss.

Single (outcomes Assessor)