MAINTENANCE OF LUMBAR LORDOSIS = DECREASED RISK OF LOW BACK PAIN,  ISCHIUM (BUTT BONE) PAIN, & COCCYX (TAIL BONE) PAIN

MAINTENANCE OF LUMBAR LORDOSIS = DECREASED RISK OF LOW BACK PAIN,  ISCHIUM (BUTT BONE) PAIN, & COCCYX (TAIL BONE) PAIN

Spine, Volume 22, Number 21, pp. 2571-2574, 1997, “Lumbar Lordosis, Effects of Sitting and Standing,” written by Michael J. Lord, M.D.; John M. Small, M.D.; Jocylane M. Dinsay, R.N., M.N.; and Robert G. Watkins, M.D., Kerlan-Jobe Orthopedic Clinic, California, U.S.A.:

The objective of the above-mentioned study was to document changes in segmental and total lumbar lordosis (inward curvature of the lumbar spine) between sitting and standing radiographs (x-rays).

“One hundred and nine patients with low back pain underwent radiography in the sitting and standing positions. The patients ranged in age from 21 years to 83 years (mean age, 47 years) and had had no prior lumbar spine fusion or clinical deformity. Seventy men and 39 women took part in the study.”

DECREASED LUMBAR LORDOSIS & LOW BACK PAIN

In their discussion, the authors state the following:

“Keegan (1953) in a study of the relationship between lordosis and sitting, found the most important factor in low back pain with prolonged sitting to be decreased trunk-thigh angle with consequent fattening of the lumbar curve.  Use of a lumbar roll that increases lordosis has been found to decrease low back pain, (Williams, A.M., et al., 1991).”

DECREASED LUMBAR LORDOSIS & BUTT PAIN / TAIL-BONE PAIN

“With decreased lordosis, sitting pressure increases over the ischium (butt bones) and coccyx (tail-bone) with resultant pain, (Drummond, D.S., et al., 1982 and 1985; Smith, R.M., et al., 1992.)

The following conclusions were made:

“Segmental and total lordosis were significantly different in the sitting and standing postures. Lordosis increased almost 50 percent when the patients moved from the sitting to the standing position. The clinical significance of this data may pertain to:

  1. The known correlation of increased intra-discal pressure with sitting, which may be caused by this decrease in lordosis;
  2. To the benefit of a sitting lumbar support that increases lordosis; and
  3. To the consideration of an appropriate degree of lordosis in fusion of the lumbar spine.”

 

 

 

Author: Melanie Loomos

I was a court reporter for 10 years and spent most of my time in very uncomfortable chairs. As a result, I spent years researching seating and submitted two patent applications: "The Carpal Tunnel Chair,” and "The Pillow with Cantilever Supports," which was granted and became The Buttpillow®. Subsequently, The Buttpillow® was improved upon as it was determined different embodiments were needed for proper ergonomic positioning depending on the individual sitter. The Patented "Ergonomic Seating Cushion,” was was granted by the USPTO; and was later amended to include an embodiment specifically to help women maintain the natural curve of their lumbar spine during the second and third trimester of pregnancy. An extreme lumbar curve that restricts blood flow to the fetus is the only external risk factor for low birth weight babies. Subsequently, in 2003, I invented Ergosoft™ break reminder software based on OSHAs Ergonomic Standard so people can identify and minimize ergonomic risk factors for the development of sitting-related pain, eye strain, DVT and carpal tunnel syndrome.

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