What is flat back syndrome of the lumbar spine?
Flat back syndrome of the lumbar spine, often abbreviated as LWS, describes an unusual curvature of the lower back. Normally, the spine in this area has a natural lordosis, which is an inward curve. With flat back syndrome, this curve is reduced or not there at all, leading to a flatter or even straight posture. This change can limit movement and cause uneven pressure on the spine, which may lead to pain over time.
Causes and risk factors
Flat back syndrome of the lumbar spine can develop for several reasons. Often, poor sitting posture or standing for long periods in an awkward position is the cause. Lack of movement and weak back muscles also play a role. When the muscles that support the spine are not strong enough, this can affect the natural curve. Injuries or conditions such as osteoporosis or slipped discs can also influence posture. In some cases, the postural problem is present from birth or develops through degenerative changes with age.
Symptoms and possible effects
People with flat back syndrome of the lumbar spine often notice back pain that gets worse after sitting or standing for a long time. This pain can spread into the legs or buttocks, which may point to nerve irritation. Limited movement in the lower back is also common. Over time, untreated flat back syndrome can lead to disc problems, as the uneven pressure puts more strain on the discs. The risk of wear and tear on the spinal joints also increases, which can make the pain worse.
Diagnosis and examination methods
To diagnose flat back syndrome of the lumbar spine, the doctor usually starts with a physical examination. The patient's posture is looked at carefully and the movement of the spine is tested. Imaging methods such as X-rays or MRI scans can be used to assess the curve of the spine more closely and to rule out other causes of the symptoms. In some cases, further tests are needed to check the condition of the discs or nerves.
Treatment options and therapy approaches
Treatment for flat back syndrome of the lumbar spine usually focuses on strengthening the muscles and improving movement. Physiotherapy is a key part of treatment and includes strengthening exercises, stretches, and posture exercises. The aim is to restore the natural curve of the spine and spread the load more evenly. In some cases, painkillers or anti-inflammatory medicines may be prescribed to ease acute symptoms. In serious cases that do not respond to non-surgical treatment, surgical correction may be considered.
Prevention and lifestyle changes
To prevent flat back syndrome of the lumbar spine, it is important to maintain good posture, especially when sitting and standing. Ergonomic furniture and regular movement breaks during the day can help reduce the strain on the spine. Back care classes and targeted strengthening exercises for the back muscles are also recommended to help stabilise the spine. A healthy lifestyle with enough movement and a balanced diet supports the health of the spine and can reduce the risk of postural problems.
Scientific sources
Kim YJ, Bridwell KH, Lenke LG, Rhim S, Cheh G. Restoration of Lumbar Lordosis in Flat Back Deformity. Clin Orthop Relat Res. 2015;473(1):166–172.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4472583/
Chun SW, Lim CY, Kim K, Hwang J, Chung SG. The relationships between low back pain and lumbar lordosis: a systematic review and meta-analysis. Spine J. 2017;17(8):1180–1191. doi:10.1016/j.spinee.2017.04.034
Bridwell KH. Flatback Syndrome. Semin Spine Surg. 2007;19(1):31–37.https://www.sciencedirect.com/science/article/abs/pii/S1042368007000095
Moustafa IM, Diab AA. Non-operative correction of flat back syndrome using extension traction: two case reports. J Phys Ther Sci. 2018;30(8):1071–1075.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6110233/
Endo K, Suzuki H, Nishimura H, Tanaka H, Shishido T, Yamamoto K. Low lordosis is a common finding in young lumbar disc herniation patients. J Exp Orthop. 2020;7(1):11.https://jeo-esska.springeropen.com/articles/10.1186/s40634-020-00253-7
Kim YJ, Bridwell KH, Lenke LG, Rhim S, Cheh G. Management of iatrogenic flat-back syndrome. J Neurosurg Spine. 2003;15(3):E8.https://thejns.org/focus/view/journals/neurosurg-focus/15/3/foc.2003.15.3.8.pdf
Takeda N, Kobayashi T, Atsuta Y, Matsuno T. Age-related loss of lumbar spinal lordosis and mobility: a study of 323 asymptomatic volunteers. PLoS ONE. 2014;9(12):e116186. doi:10.1371/journal.pone.0116186
