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Jan 16

Written by: Larry Huppin, DPM
1/16/2012 9:44 AM

Research suggests foot orthoses can affect frontal and transverse plane motion in proximal joints during landing from a jump. This could help decrease the risk of anterior cruciate ligament injury, especially in female athletes.

A recent article in Lower Extremity Review looked at this subject in detail. We are recommending this article to all ProLab clients.

Some of the article highlights include:
In the May issue of the Journal of Applied Biomechanics (JAB), researchers from East Carolina University (ECU) in Greenville, SC, reported that gender and foot orthoses affect frontal plane hip motion during landing from a vertical jump.

“Foot orthotic devices are able to change hip motion in the frontal and transverse plane,” said Walter Jenkins, PT, DHS, associate professor and chair of ECU’s Department of Physical Therapy. “Dysfunctional hip motion is commonly observed in patients with knee pathology.”

Orthotic Effects in Men vs. Women
“We have shown in our lab that men actually land in knee varus with their hip abducted and use hip adduction and knee valgus as a strategy to accelerate during the jump after the deceleration phase of landing. Therefore, an orthotic intended to decrease frontal plane adduction in men would be ineffective,” Joseph said. “Women have poor frontal and transverse plane control of their kinematic chain. A foot orthotic may be a simple solution—and quicker than neuromuscular retraining—to control motion”

Differences in Prefabricated vs. Custom Orthoses
In the November 2009 issue of JAB, researchers from ECU reported that foot orthotic devices decreased transverse plane motion during landing from a forward vertical jump in healthy young women, but that prefabricated and custom orthoses had different effects. The investigators analyzed 3D motion of the lower extremities of 12 female college students during a vertical jump with no orthoses, over-the-counter orthoses, and custom-made orthoses. Compared with no orthoses, the women had significantly less internal rotation at the hip (p< .05) with over-the-counter orthoses and significantly less tibial internal rotation (p< .05) with custom-made orthoses.

Once again, we recommend that all ProLab clients read this article in Lower Extremity Review

ProLab takes a scientific approach with our orthoses by integrating evidence-based medicine into orthotic therapy. Our team of Medical Consultants regularly evaluates the medical literature pertaining to orthotic therapy and biomechanics. ProLab clients are encouraged to contact a medical consultant whenever they have questions about an orthotic prescription.

For an easy way to stay up-to-date on evidence-based orthotic therapy, subscribe to our free E-Journal. Your will receive a monthly email synopsis of the research that impacts your practice.  


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