The goal of this clinical trial is to evaluate the long-term effects of isokinetic rehabilitation training in patients with spinal muscular atrophy (SMA). The main question it aims to answer is: ā¢ Does isokinetic training at fixed angular velocity improve muscle strength and functional recovery in SMA patients? Participants will: * Perform isokinetic training using a portable device with a fixed angular velocity. * Undergo long-term rehabilitation sessions, with assessments of muscle strength and overall functional improvement over the training period.
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Change in cross sectional area of quadriceps
Timeframe: Baseline, after 1.5 months, after 3 months and after 4 months
Change in longitudinal cross-sectional width of quadriceps
Timeframe: Baseline, after 1.5 months, after 3 months and after 4 months
Change in peak torque
Timeframe: Baseline, after 1.5 months, after 3 months and after 4 months
Change in average torque
Timeframe: Baseline, after 1.5 months, after 3 months and after 4 months
Change in work of knee
Timeframe: Baseline, after 1.5 months, after 3 months and after 4 months
Change in Surface Electromyography (sEMG)
Timeframe: Baseline, after 1.5 months, after 3 months and after 4 months
Change in Nerve conduction
Timeframe: Baseline, after 1.5 months, after 3 months and after 4 months