High Heritability Found for ACL Rupture December 16, 2020 For common sports injuries, it has long been thought that external factors played the central role in the type and severity of the damage. But now, a new study from investigators at Lund University in Sweden is adding a new factor to that traditional mindset: genetics. The Swedish researchers just published new findings that suggest a high rate of heritability for a very common sports knee injury—rupture of the anterior cruciate ligament (ACL). Results from the new study were recently released in the By analyzing data from the Swedish Twin Register, along with data from the Swedish National Patient Register, researchers were able to see how many identical twins and fraternal twins had been diagnosed with anterior cruciate ligament rupture.