Why Are Women More Prone to Knee Injuries Than Men?

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Researchers from The University of Texas Medical Branch at Galveston have found that women who take the birth control pill, which lessen and stabilize estrogen levels, were less likely to suffer serious knee injuries. The findings are currently available in Medicine & Science in Sports & Exercise, the official journal of the American College of Sports Medicine.

Female athletes are 1.5 to 2 times more likely than their male counterparts to injure their anterior cruciate ligament, or ACL. The ACL is a ligament that connects the top and bottom portions of the knee. Damage to this ligament is a serious athletic injury that can be career altering. Return-to-play rates after ACL injury are as low as 49 percent among soccer players. Also, this injury may lead to lifelong issues with knee instability, altered walking gait and early onset arthritis.

Using a national insurance claims and prescription database of 23,428 young women between 15 and 19, the study found that women with an ACL knee injury who were taking the birth control pill were less likely to need corrective surgery than women of the same age with ACL injuries who do not use the birth control pill.

Researchers have proposed that the female hormone estrogen makes women more vulnerable to ACL injury by weakening this ligament. A previous investigation found that more ACL injuries in women occur during the points of their menstrual cycle when estrogen levels are high.

“Birth control pills help maintain lower and more consistent levels of estrogen, which may prevent periodic ACL weakness,” said lead author and M.D. – Ph.D. student Aaron Gray. “With this in mind, we examined whether oral contraceptive use protected against ACL injuries that require surgery in women.”

Women between15-19 y in need of ACL reconstructive surgery, the age group with the highest rates of ACL injuries by a wide margin, were 22 percent less likely to be using the birth control pill than non-injured women of the same age.

Gray said that puberty might explain the high number of ACL injury cases in young women of this age. During puberty, there is a sharp rise in estrogen levels as well as growth spurts in the legs. Following one of these growth spurts, it takes time for the adolescent to develop good coordination with their newly elongated limbs.

“Young athletes currently use birth control pills for various reasons including more predictable cycles and lighter periods,” Gray said. “Injury risk reduction could potentially be added to that list with further, prospective investigations.”

Misty Boggs
Misty Boggs is the Creative Director at MSGPR. She lives in Angelina County and recently earned her bachelor's degree in Public Relations and a minor in Creative Writing at Stephen F. Austin State University in 2020. She is currently working on obtaining her MBA from Lamar University. Between studying and working, she enjoys teaching her niece and nephew the fine art of never growing old.

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