To measure the levels of flexibility in children with Down syndrome between the ages of 5 and 20 and compare them with children called normal. n = 11 women and n = 24 men between 5 and 20 years of age with age syndrome were evaluated for a total of 35 children of the FunDown Foundation, located in the city of Bucaramanga, the weight assessment was made, size and flexibility was measured in the participants, a comparison was also made with students from the same city who do not have Down syndrome