Effect of Muscle Fatigue on Spinal Imbalance and Motion in Lumbar Spinal Stenosis

Inclusion Criteria:for patients with sLSS * age \> 30 years * BMI \< 35kg/m2 * diagnosed symptomatic lumbar spinal stenosis * clinical symptoms for at least 6 months * intermittent neurogenic claudication with limitations of their walking ability due to symptoms in the lower back and or in one or both legs * unsuccessful conservative treatment * confirmation of the LSS through MRI * Inclusion criteria for age-matched healthy control subjects * age \> 30 years * BMI \< 35kg/m2 * Inclusion criteria for young healthy control subjects * 18 years ≤ age ≤ 30 years * BMI \< 35kg/m2 Exclusion Criteria:for patients with sLSS * inability to provide informed consent * previous spine surgery * use of walking aids * other neurologic disorders affecting gait * MRI incompatibility * Exclusion criteria for age-matched healthy control subjects * inability to provide informed consent * previous spine surgery * history of claudications * use of walking aids * other neurological or orthopaedic conditions that may affect gait * MRI incompatibility * Exclusion criteria for young healthy control subjects * inability to provide informed consent * previous back injury; previous spine surgery * use of walking aids * current injury of any kind