An interventional study of Schroth Group and Schroth and Pilates Group in Adolescent Idiopathic Scoliosis (AIS), sponsored by Ankara Yildirim Beyazıt University. Recruiting at 1 site in Turkey (Türkiye). Open to participants aged 10 Years to 18 Years. Per ClinicalTrials.gov, last updated 2026-07-14.
Sponsored by Ankara Yildirim Beyazıt University · Not applicable, Interventional, and Treatment
The primary aim of this study is to investigate the effectiveness of Schroth training and the multidimensional effects of adding Pilates-based exercises to Schroth training in individuals with adolescent idiopathic scoliosis. Specifically, the study aims to evaluate the effects of Pilates-based exercises combined with Schroth training on lung capacity, trunk muscle strength, proprioception, trunk rotation, and posture. In addition, it seeks to examine the impact of the intervention on important functional and psychosocial outcomes, including quality of life, perceived cosmetic deformity, and pain threshold.
This study is expected to contribute to the existing evidence on the use of Pilates exercises in combination with Schroth exercises for individuals with adolescent idiopathic scoliosis by providing a comprehensive evaluation of the effects of this combined intervention. The findings are intended to provide guidance for clinicians and researchers regarding the combined use of different exercise approaches in the management of adolescent idiopathic scoliosis. Furthermore, the study aims to explore the potential benefits of integrating the Schroth method with Pilates as a holistic treatment approach for scoliosis management.
Scoliosis is a three-dimensional spinal deformity characterized by a lateral curvature greater than 10° measured using the Cobb angle, accompanied by vertebral rotation . Approximately 80% of idiopathic scoliosis cases occur during adolescence . Adolescent idiopathic scoliosis (AIS) typically develops between the ages of 10 and 18 years. Several factors, including the initial curve magnitude, curve location, apical vertebral rotation, and age, have been identified as risk factors for curve progression .
Treatment of AIS depends on the severity of the spinal curvature and may include bracing, exercise-based interventions, or surgical treatment. The International Society on Scoliosis Orthopaedic and Rehabilitation Treatment (SOSORT) classifies scoliosis exercise approaches under the category of Physiotherapeutic Scoliosis-Specific Exercises (PSSE). Among these approaches, the Schroth method, which is based on rotational angular breathing, is one of the most widely used and extensively studied treatment methods in the literature . revious research has demonstrated that Schroth therapy may contribute to reductions in Cobb angle and improvements in quality of life in adolescents with idiopathic scoliosis. In addition, Schroth-based exercises have been associated with enhanced thoracic and lumbar proprioception.
The literature has associated increases in thoracic curvature, measured by the Cobb angle, with reductions in pulmonary function. Although these reductions have not yet been classified as abnormal by the American Thoracic Society, decreased pulmonary function has been observed even in individuals with mild spinal curvatures. It has been estimated that every 4-5° increase in Cobb angle is associated with approximately a 1% reduction in total lung capacity .
Pilates, originally referred to as "Contrology", was developed by Joseph Pilates and has become widely practiced in both fitness and rehabilitation settings . Although relatively few studies have investigated the effects of Pilates on scoliosis, existing evidence suggests that it may have beneficial effects in this population . Gou et al. reported that Pilates exercises reduced the Cobb angle while improving quality of life and trunk range of motion.
In a 12-week intervention study, Khaledi et al. compared Schroth exercises combined with asymmetric spinal stabilization exercises and found no significant between-group differences in back muscle endurance. Nevertheless, numerical improvements favored the combined exercise group compared with the control group. Similarly, previous studies were compared Schroth exercises with core stabilization exercises in adolescents with idiopathic scoliosis and found that participants receiving Schroth training demonstrated significantly greater improvements in perceived cosmetic appearance than those performing core stabilization exercises. Despite these promising findings, the level of evidence supporting the effectiveness of Pilates exercises in the management of scoliosis-related deformities remains limited. Pilates exercises have been reported to reduce asymmetrical posture in individuals with mild scoliosis and a low risk of progression. Both Schroth and Pilates exercises are considered to have positive effects on lung capacity, trunk proprioception, trunk muscle strength, and quality of life in individuals with AIS. However, previous studies have primarily investigated the effects of these exercise approaches separately. Based on the current literature, no study has evaluated the effects of Pilates-based core stabilization exercises added to Schroth training in individuals with adolescent idiopathic scoliosis. Therefore, further research is needed to investigate the potential benefits of this combined intervention.
Ankara Yildirim Beyazıt University is the lead sponsor of 228 studies on the registry; 53 are open to participants now.
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Exclusion Criteria:
Participants will receive supervised Schroth exercises based on the standardized Schroth method throughout the intervention period.
Behavioral: Schroth Group
Participants in this group will receive Schroth exercises combined with Pilates-based exercises under the supervision of a physiotherapist throughout the intervention period.
Other: Schroth and Pilates Group
Participants will be randomly allocated to either the intervention group or the control group.Participants in the control group will receive supervised Schroth exercise training twice weekly for 8 weeks in face-to-face sessions conducted by a physiotherapist. In addition, they will perform only the Schroth home exercise program.All participants will perform their home exercises twice daily, in the morning and evening. Before prescribing the home exercise program, the physiotherapist will provide detailed instructions and demonstrate each exercise during the clinical sessions. The home exercises will be performed twice daily, with each exercise consisting of 3 sets of 10 repetitions.
Participants will be randomly allocated to either the intervention group or the control group. Participants in the intervention group will receive supervised Schroth training combined with Pilates-based exercises twice weekly for 8 weeks in face-to-face sessions conducted by a physiotherapist. In addition, they will be prescribed a home exercise program consisting of Schroth home exercises and Pilates-based exercises.All participants will perform their home exercises twice daily, in the morning and evening. Before prescribing the home exercise program, the physiotherapist will provide detailed instructions and demonstrate each exercise during the clinical sessions. The home exercises will be performed twice daily, with each exercise consisting of 3 sets of 10 repetitions.
Assessment of Lung Capacity
Vital Capacity (VC) will be assessed using a COSMED microQuark PC spirometer (Rome, Italy). During the assessment, participants will be seated comfortably in an upright position. A nose clip will be applied to prevent airflow through the nose during the test. VC values will be interpreted by comparing the measured values with the predicted reference values obtained from healthy individuals.
Time frame: Baseline and 2 months
Assessment of Lung Capacity
Forced Vital Capacity (FVC) will be assessed using a COSMED microQuark PC spirometer (Rome, Italy). During the assessment, participants will be seated comfortably in an upright position. A nose clip will be applied to prevent airflow through the nose during the test. FVC values will be interpreted by comparing the measured values with the predicted reference values obtained from healthy individuals.
Time frame: Baseline and 2 months
Assessment of Lung Capacity
Total Lung Capacity (TLC) will be assessed using a COSMED microQuark PC spirometer (Rome, Italy). During the assessment, participants will be seated comfortably in an upright position. A nose clip will be applied to prevent airflow through the nose during the test. TLC values will be interpreted by comparing the measured values with the predicted reference values obtained from healthy individuals.
Time frame: Baseline and 2 months
Assessment of Lung Capacity
Residual Volume (RV) will be assessed using a COSMED microQuark PC spirometer (Rome, Italy). During the assessment, participants will be seated comfortably in an upright position. A nose clip will be applied to prevent airflow through the nose during the test. RV values will be interpreted by comparing the measured values with the predicted reference values obtained from healthy individuals.
Time frame: Baseline and 2 months
Assessment of Lung Capacity
Forced Expiratory Volume in One Second (FEV₁) will be assessed using a COSMED microQuark PC spirometer (Rome, Italy). During the assessment, participants will be seated comfortably in an upright position. A nose clip will be applied to prevent airflow through the nose during the test. FEV₁ values will be interpreted by comparing the measured values with the predicted reference values obtained from healthy individuals.
Time frame: Baseline and 2 months
Assessment of Core Muscle Strength
Core muscle strength will be assessed using The Stabilizer Pressure Biofeedback Unit (Chattanooga Group Inc., USA) with the participant in the prone position. The pressure cuff of the Stabilizer unit will be placed horizontally beneath the abdominal region, with its lower edge aligned with the anterior superior iliac spines (ASIS). Participants will be instructed to take a deep breath, exhale, and gently draw the umbilicus toward the lumbar spine while maintaining normal breathing. After participants have been familiarized with the maneuver, the Stabilizer unit will be inflated to 70 mmHg. Participants will then be asked to repeat the maneuver and maintain the contraction for 10 seconds. The assessment will be performed three times, and the mean value will be recorded.
Time frame: Baseline and 2 months
Postural Assessment
The device projects white light stripes (raster lines) onto the participant's back, and the three-dimensional shape of the back is reconstructed by analyzing the deformation of these projected lines. The resulting curved light patterns are captured by a camera, allowing a radiation-free and non-contact assessment of spinal alignment and posture. During the assessment, participants will be instructed to stand in a relaxed and stationary position facing forward, with their back toward the camera, arms hanging freely at their sides, and feet positioned on the designated markers on the platform. The following postural parameters will be assessed: pelvic symmetry, shoulder and scapular alignment, vertebral rotation, thoracic kyphosis angle, and lumbar lordosis angle.
Time frame: Baseline and 2 months
Assessment of Trunk Proprioception
Trunk proprioception will be assessed using a dual digital inclinometer (ACUMAR™, Lafayette, IN, USA). Participants will stand barefoot on a firm surface with their feet shoulder-width apart. The inclinometer sensors will be placed over the T1 and S1 spinous processes, identified by palpation. Participants will perform 30° trunk flexion and 15° trunk extension with their eyes open, memorize each target position, return to the starting position, and then reproduce the target angle. Each measurement will be repeated three times. The difference between the target and reproduced angles will be recorded in degrees as the measure of trunk proprioception.
Time frame: Baseline and 2 months
Assessment of Trunk Rotation
Trunk rotation will be assessed using a Baseline Scoliometer (Fabrication Enterprises, White Plains, NY, USA). Participants will stand upright with their feet together and parallel, facing forward. They will then be instructed to place their hands together and bend forward until the trunk is parallel to the floor while keeping the arms relaxed. Angle of trunk rotation (ATR) will be measured at the cervical, thoracic, and lumbar regions, and the values will be recorded
Time frame: Baseline and 2 months
Assessment of Pain Threshold
Pressure pain threshold will be assessed using a Baseline algometer (White Plains, NY, USA). The device applies pressure through a 1 cm² rubber tip, and the pressure at which pain is first perceived will be recorded in kg/cm² . Measurements will be performed bilaterally at points 2-3 cm lateral to the paravertebral muscles at the level of the participant's primary spinal curve. Before testing, pressure will be applied to a non-test area to familiarize participants with the procedure. Pressure will then be gradually increased until the participant indicates that the sensation has become painful by raising a hand. Three consecutive measurements, separated by 5-second intervals, will be obtained, and the mean value will be recorded.
Time frame: Baseline and 2 months
Assessment of Quality of Life
Quality of life will be assessed using the Scoliosis Research Society-22 (SRS-22) questionnaire. The Turkish validity and reliability of the questionnaire were established by Alanay et al. (2005). The SRS-22 consists of 22 items organized into five domains: pain, self-image/appearance, function/activity, mental health, and satisfaction with treatment. Each item is scored on a 5-point Likert scale, with higher scores indicating better quality of life. Permission to use the questionnaire will be obtained following ethics committee approval.
Time frame: Baseline and 2 months
Assessment of Perceived Cosmetic Deformity
Perceived cosmetic deformity will be assessed using the Walter Reed Visual Assessment Scale (WRVAS). The Turkish validity and reliability of the scale were established by Çolak et al. (2020). The WRVAS is a visual instrument developed to evaluate how individuals with adolescent idiopathic scoliosis perceive their own deformity. It consists of seven items assessing spinal deformity, rib prominence, lumbar prominence, thoracic deformity, trunk imbalance, shoulder asymmetry, and scapular asymmetry. Each item includes five illustrations representing increasing deformity severity and is scored from 1 to 5, with higher scores indicating greater perceived deformity. The questionnaire will be completed separately by the physiotherapist, the participant, and a parent before and after the intervention. Permission to use the scale will be obtained following ethics committee approval.
Time frame: Baseline and 2 months
Plan to share: No
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