There has been much effort in recent years to better understand the causes of idiopathic scoliosis (IS). Some studies suggested muscle imbalance as a cause of scoliosis based on asymmetric muscular activation. Surface electromyography can evaluate asymmetrical muscular weakness. Therefore, the peak amplitude values can be used to compare the side to side differences in paraspinal muscles. From these findings the investigators improve the exercise method of IS according to muscle weakness and curve pattern.

Design: Prospective study Setting: hospital rehabilitation department the investigators will check the muscular activation at bilateral paraspinal muscles with surface electromyography and curve type with simple radiography.

Intervention: After that the investigators educate asymmetrical stabilization exercise according to muscle weakness and curve pattern.

Main outcome measures: Cobb angle

Inclusion Criteria:

• X-ray shows a cobb angle of 10 degrees or higher.
• Patients 8 and older.

Exclusion Criteria:

• Patients with spinal surgery
• Patients with scoliosis caused by cerebral palsy, muscle paralysis, polio, congenital spinal cord abnormalities, etc.
• Cobb angle less than 10 degrees and more than 40 degrees
• Patients with acute back pain