Balance ability was measured using BioRescue (RM Ingenierie Co., France). Static balance ability, sway path (SP) and the sway area (SA) were measured with the subjects looking to at the front for 60 seconds on the plate, with their eyes open. To determine the dynamic balance ability, the average speed of the sway (SAP) was measured during rotation of 180 degrees on the plate. For the clinical assessment, the trunk impairment scale (TIS) was used to evaluate the static, dynamic, and coordination ability of the trunk in the sitting position.