This study aims to develop and evaluate a wireless, non-invasive, embedded electromyography (EMG) system for monitoring paraspinal muscle activation asymmetries in adolescents with idiopathic scoliosis. Surface EMG electrodes will be placed bilaterally around the apical vertebra of the spinal curve to record muscle activity during static (seated) and dynamic (trunk extension) tasks. Measurements will be taken longitudinally over the course of physiotherapy treatment to evaluate whether the recorded muscle activity patterns can serve as an objective, non-invasive indicator of treatment response, potentially reducing reliance on repeated radiographic (X-ray) follow-up.