Can a simple traction table ease chronic back pain in obesity?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Written consent to participate in the study, 2. Age: 35 - 60 years, 3. Obesity (BMI ≥ 30 kg / m2) or normal weight (BMI 18,5-29,9 kg/m2), 4. Stable body weight in the last month ± 2 kg, 5. Chronic low back pain. Exclusion Criteria: 1. Secondary form of obesity; 2. Serious neurological defects (including large muscle losses, sensory disturbances in a large area of the lower limb, occurrence of cauda equina syndrome); 3. Surgery, post-accident mechanical injuries, history of spine fractures; 4. History of rheumatic disease (RA, ankylosing spondylitis, systemic lupus); 5. Osteoporosis; 6. Pain located in a location other than the spine which is more severe than the low back pain; 7. Poorly controlled type 2 diabetes; 8. Poorly controlled hypertension (mean systolic blood pressure\> 140mmHg and / or average diastolic blood pressure\> 90mmHg) during the last month and / or the necessity of modification of pharmacological treatment; 9. Lipid disorders requiring the introduction of pharmacological treatment in the last 3 months before observation or during observation; 10. Acute coronary event, unstable angina, stroke or transient cerebral ischemia in the last 6 months; 11. Features of heart failure in physical examination and / or additional tests (chest X-ray, echocardiography); 12. Clinically significant arrhythmias, conduction disorders, pacemaker implantation; 13. Fainting in an interview, 14. Chronic kidney disease with creatinine clearance \<60mL / min / 1.73m2; 15. Clinically significant liver dysfunction (transaminases exceeding 3 times the normal range); 16. Acute or chronic, clinically apparent inflammatory process of the respiratory tract, inflammatory processes of the genitourinary system, inflammatory process in the head and neck; 17. Acute infection in the last month; 18. Cancer; 19. Alcohol abuse, drug addiction; 20. Pregnancy; 21. Uncontrolled mental illness that may falsify test results; 22. Other conditions which may pose any risk to the patient during the observation.