Houston Methodist. Leading Medicine

General Spine News

First Study to Look at Muscle Strength in Patients with Disc Herniation


We know that patients with low back pain (LBP) of unknown cause have weaker trunk and knee strength. Is this also true for patients who have lumbar disc herniation (LDH)? Does sciatica cause leg weakness on one side or in both legs? These are the questions asked by researchers in this study.

Strength of trunk muscles and both knees was measured for LDH patients with and without sciatica. Results for all patients with LDH were compared to healthy volunteers (the control group).

Researchers found much lower muscle strength in trunk and knee motion for the LDH patients. This was true with fast or slow movements. There was no difference in strength between the sciatica and non-sciatica legs in the LDH group. Both sides were weak.

The authors say the weakness doesn't seem to be coming from the effect of the LDH on muscles. Patients with nonspecific LBP have the same weakness. It may be that pain in the back and legs leads to physical disability and muscle atrophy.

Weakness is the final result of both. Fear of pain may add to the problem. Patients stop moving normally when they're afraid it's going to hurt.

This was the first study to look at the effect of LDH on both trunk and leg muscle strength. Future studies are needed to help explain the results. Scientists will attempt to find out what the exact mechanism is for decreased strength of trunk and both legs in patients with LDH. This information may help prevent such problems for LDH patients.


Cheng-Wen Ho, MD, PhD, et al. Isokinetic Muscle Strength of the Trunk and Bilateral Knees in Young Subjects with Lumbar Disc Herniation. In Spine. September 15, 2005. Vol. 30. No. 18. Pp. E528-E533.

10/20/2005

*Disclaimer:* The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.
All content provided by eORTHOPOD® is a registered trademark of Medical Multimedia Group, L.L.C.. Content is the sole property of Medical Multimedia Group, LLC and used herein by permission.

Our Specialties

Where Does It Hurt?

Our Locations

  Follow Us

Follow us on Facebook Follow us on YouTube
Follow us on Twitter