Gait in patients with adolescent idiopathic scoliosis. Effect of surgery at 10 years of follow-up.

•Back muscles EMG is increased in adolescent idiopathic scoliosis during gait.•Mechanichal and metabolic energy are altered in AIS whatever the curve severity.•Spinal arthrodesis in AIS reduces spine motion without to alter the gait kinematics.•At long term after surgery, back muscles EMG, during gait, tends to the norms.•Metabolic energy remains excessive in AIS despite the long term surgical follow-up.