Smith MD, Russell A, Hodges PW. Disorders of breathing and continence have a stronger association with back pain than obesity and physical activity. Australian
Journal of Physiotherapy 2006; 52 (1): 11-16.
Martimo KP, Verbeek J, Karppinen J, Furlan A D, Kuijer PPFM, Viikari-Juntura E, Takala EP, Jauhiainen M. Manual material handling advice and assistive devices for preventing and treating back pain in workers. Cochrane Database of Systematic Reviews 2007, Issue 3. Art. No.: CD005958. DOI: 10.1002/14651858.CD005958.pub2