Maximal isometric contraction was evaluated with "Hand-held" dynamometer (Lafeyette Instrument®, Lafayette, IN) using a standard protocol and recorded in kg / Newton. In our study, strength of trunk flexion and extansion, upper-middle-lower trapesiuz, serratus anterior, latissimus dorsi, bilateral hip flexion, extansion, abduction, knee flexion, extansion and ankle plantarflexion, dorsiflexion were examined bilaterally.

Goniometric measurement is an objectively used method in the evaluation of ROM in the clinic. In our study, trunk flexion, extansion and lateral flexion were measured with goniometer.

Triple-Hop Distance test is considered to be a valid and reliable test in evaluating the functional status as it is easy to apply and does not require much time and equipment. Participants performed 3 consecutive maximal hops forward on the right and left limb. It was measured with tape the distance hopped from the starting line to the point where the heel struck the ground upon completing the third hop. The maximum distance achieved during the 3 trials was recorded in centimeters and was used for analysis. High scores indicate that the functional condition is good.

20-m sprint test is used to evaluate the maximum running time of the participants. Maximal effort sprint was assessed from a stationary start. Participants was instructed to stand with one foot right behind the starting line and to accelerate at maximum effort to the finish line. The best value of 3 trials (minimal sprint time) with a 2 min rest between trials was used for further data analysis. Time was taken with a stop watch.

The physical activity level of the participants wasevaluated with the Physical Activity Questionnaire for Children , which is frequently used in the clinic. This questionnaire consists of 9 items in the 5-point Likert type that questions the physical activities performed in the last 7 days and how often these activities are performed. A high score on the scale indicates that the physical activity level is high.

Pediatric Quality of Life Inventory is a quality-of-life scale with validity and reliability of 23 items, which are frequently used in research to question the quality of life in children and adolescents. The higher the score obtained from the scale, the higher the quality of life increases.

It measures the distance (using a tape at the level of the acromion) that an participants are able to reach forward and sides from a starting standing position with a fixed base of support without loss of balance. In our study, the distance to the forward and sides of the cases was tested. For each position were made 3 measurements and their average values were calculated. High scores indicate that the functional balance is good.

The occiput-wall distance is a surrogate measure of kyphosis.The method has been verified for its reliability and validity. Two rulers were used to quantify the outcomes: the first ruler was placed on the landmark (occiput), and the second ruler was used to measure a perpendicular distance from the first ruler (occiput) to the wall. The measurement was repeated for three trials with a period of rest as needed between the trials, and the average distance over the three trials was used for the data analysis. Higher values indicate an increase in kyphosis angle.

The patients were placed in the supine position with their forearms pronated on the side of the body, in this position the distance between the acromion and the bed was measured with a tape measure and the value was recorded in cm. High values indicate muscle shortness.