Inclusion Criteria:  Dutch speaking Body mass index below 35kg/m² Lumbar radiculopathy patients, classified as ASA I to II without any symptoms of spinal cord compression (i.e. bilateral leg pain), who are scheduled for a first-time, single-level, unilateral lumbar discectomy Healthy, pain-free controls (score 0 on a visual analogue scale from 0 to 100)  Exclusion Criteria:  Female participants will be excluded if pregnant, lactating or <1 year postnatal Having (a history) of severe medical disorders either respiratory (e.g. cystic fibrosis), orthopedic (e.g. whiplash trauma), neurologic (e.g. cerebrovascular incident), cardiovascular (e.g. severe hypertension), endocrinological (e.g. diabetes), psychiatric (e.g. post-traumatic stress disorder Having a history of spinal surgery (e.g. discectomy), spinal traumata (e.g. vertebral fracture) or severe spinal deformities (e.g. spondylolisthesis) Having a pacemaker or defibrillator Healthy controls will be excluded if having suffered low back pain in the preceding year of score 2 or higher on the visual analog scale and which limited their activities of daily living or for which they consulted a (para)medic.