Pain Reducing Effect of Transcutaneous Electrical Nerve Stimulation in Patients With Chronic Low Back Pain or Lumbo-radiculalgia

Inclusion Criteria: * Stable chronic low back pain or stable chronic lumbo-radiculalgia * Patients with a pain score at least superior or equal to 4 * Patients followed in pain clinics * Written informed consent Exclusion Criteria: * Prior ambulatory TENS practice * Lumbo-radiculalgia pathology surgery within 3 months before inclusion * Acute low back pain or bilateral lumbo-radiculalgia * Acute radiculalgia * Surgery planned within 6 months * Pacemaker * Symptomatic low back pain