This prospective randomized controlled trial will evaluate whether adding resisted inspiratory muscle training (IMT) to Physiotherapeutic Scoliosis-Specific Exercises (PSSE)-Schroth exercises provides additional benefits on clinical outcomes in individuals with adolescent idiopathic scoliosis. Participants will be randomly assigned to either PSSE-Schroth plus IMT or PSSE-Schroth alone. Both groups will receive supervised exercise sessions three times per week for 8 weeks (24 sessions). Outcomes will be assessed before and after the intervention and will include clinical measures (e.g., Cobb angle, angle of trunk rotation, Posterior Trunk Symmetry Index, The Walter Reed Visual Assessment Scale), respiratory muscle performance (maximal inspiratory pressure/maximal expiratory pressure, six-minute walk test) and related physiological parameters, functional performance (balance, 3D kinematics, plantar pressure analysis, isokinetic strength), sleep quality, and health-related quality of life (Scoliosis Research Society- 22, Italian Spine Youth Quality of Life). The study is expected to enroll approximately 45 participants.
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Six-Minute Walk Test
Timeframe: Baseline and after 8 weeks (24 supervised sessions).
Change in Cobb Angle
Timeframe: Baseline and after 8 weeks (24 supervised sessions).
Respiratory muscle strength - maximal inspiratory pressure (MIP)
Timeframe: Baseline and Week 8 (end of 24 supervised sessions).