Trunk control in children with spastic Cerebral Palsy (CP) is impaired. They have weaker trunk muscle strenght, and insufficient sitting/standing balance according to their developing peers. Since their weak trunk muscles and insufficient balance responses, they are not able to walk as functional similar to their peers. Additionaly limit of stability is worsen in children with CP. Investigation of the relationship between walking ability and limit of stability when seated position is important to understand which child is acceptable for training of walk. However we did not found any study to explain it. Therefore the aim of this study is to investigate walking ability and limit of stability in children with spastic CP, and to compare their developing peers.

Inclusion Criteria:

• spastic serebral palsy, between the ages 6-15 years, between the I-IV. levels of GMFCS, be able to understand command given by physical therapist

Exclusion Criteria:

• undergone botulinum toxin A to upper and/or lower extremities, undergone any surgery to their extremities, be at the V. levels of GMFCS

Spastic cerebral palsy and their developing peers