OLST:During the OLST,the participants were asked to shoes off,place both hands on their hips and look at a point on the wall at eye level.A recording stopwatch was used to assess their standing duration on one leg while keeping the other leg in 90 degrees of knee flexion.The test was stopped when the contralateral foot touched the ground or when the participant broke 90 degrees of knee flexion.The OLST was repeated three times for each leg.GMFM:To assess standing and walking,running and jumping functions of the UCP group,the D and E dimensions of GMFM were utilized by a certificated physiotherapist.Each item was tested by three trials and the best trial was used.Pedobarography:The participants' plantar pressure was analyzed using pedobarography.For each participant, the pedobarography was calibrated before the assessment.During the pedobarographic analysis, the participants walked barefoot in 90 BPM cadence. Three steps were analyzed for each side.

During the OLST, the participants were asked to shoes off, place both hands on their hips and look at a point on the wall at eye level. A recording stopwatch was used to assess their standing duration on one leg while keeping the other leg in 90 degrees of knee flexion. The test was stopped when the contralateral foot touched the ground or when the participant broke 90 degrees of knee flexion. The OLST was repeated three times for each leg and the best score was chosen.

The Gross Motor Function Measure (GMFM) is an assessment tool designed and evaluated to measure changes in gross motor function over time or with intervention in children with cerebral palsy. Items span the spectrum of gross motor activities in five dimensions.

A: Lying and Rolling,

B: Sitting,

C: Crawling and Kneeling,

D: Standing, and

E: Walking, Running and Jumping. In our study, To assess standing and walking, running and jumping functions of the UCP group (GMFCs level I and II), the D and E dimensions of GMFM were utilized by a certificated physiotherapist. Each item was tested by three trials and the best trial was scoring between 0-3 points.

The participants' plantar pressure was analyzed using pedobarography (Tekscan Inc. Mass. USA) with rectangular shape plates (43.59 x 36.88 x 5.77 cm) and 2288 resistive pressure sensors. For each participant, the pedobarography was calibrated before the assessment. During the pedobarographic analysis, the participants walked barefoot in 90 BPM cadence with the aid of a metronome. Before the pedobarographic analysis, each participant walked three minutes to adapt to the metronome.Three steps were analyzed for each side (affected and unaffected sides) to evaluate the following parameters i) time of peak force in early stance phase (T1), ii) time of peak force of late stance phase (T2), iii) stance phase stability (T2-T1), iv) duration of total stance phase (TS) and v) ratio (T2-T1/TS). A mean value of each parameter was used for statistical analysis.