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Women active in sports that involve jumping and pivoting (e.g.,
volleyball or basketball) are up to eight times more likely
to rupture their anterior cruciate ligament (or ACL - a primary
knee ligament) than men participating in the same sports.
Ligaments are the durable tissues that hold our bones together;
the ACL and its counterpart, the posterior cruciate ligament
(PCL), provide stability in the knee joints, and injuries
to them can be painful and debilitating.
Researchers evaluated why female athletes are prone to knee
ligament injuries in a recent study published in The Journal
of Bone and Joint Surgery. Higher muscle stiffness helps
brace the knee joint and reduces strain on the knee ligaments;
therefore, the  researchers
examined muscle stiffness of the knee joint during muscle
activation in 12 female and 12 male athletes competing for
the National Collegiate Athletic Association (NCAA) in basketball,
volleyball or soccer, and compared these athletes to 28 collegiate
athletes involved in endurance sports, including bicycling
and running, which are low-risk for cruciate ligament injury.
Women and their male athlete counterparts were matched for
size, weight and activity level.
Rotations of the leg were greater in female than in male
athletes when participating in sports and when passively rotated
at rest. In addition, measurements indicated that women demonstrated
significantly lower knee muscle stiffness under rotational
stress than their male counterparts. During jumping and pivoting
maneuvers, which are the most likely time for a cruciate ligament
injury, the difference in protective muscle stiffness around
the knee was the most pronounced between the men and women.
Women are more prone to serious injuries of the knee ligaments
than men, possibly due to less muscle protection. If you are
a female athlete, talk to your doctor of chiropractic about
methods for strengthening the stabilizing muscles around your
knees. Also, adhere to proper techniques and form when performing
your sport to minimize the risk for injury.
Reference
Wojtys EM, Huston LJ, et al. Gender differences in muscular
protection of the knee in torsion in size-matched athletes.
The Journal of Bone and Joint Surgery 2003:85(5), pp.
782-789.
For more information about women's health issues, go to www.chiroweb.com/find/tellmeabout/women.html.
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