After ACL Surgery, Another Knee Injury Likely, Study Suggests

The study included 59 females and 19 males, aged 10 to 25, who underwent ACL reconstruction and returned to sports, and a control group of 47 people who had never suffered an ACL injury.

After two years, 23 of those in the reconstruction group and four of the people in the control group had suffered an ACL injury. Overall, 29.5 percent of athletes suffered a second ACL injury within two years of returning to sports, with 9 percent re-injuring the same knee and 20.5 percent suffering an injury to the opposite knee.

"In our study, female athletes after [ACL reconstruction] demonstrated more than four times greater rate of injury within 24 months than their healthy counterparts," Paterno said in a society news release.

Link to article (http://www.nlm.nih.gov/medlineplus/news/fullstory_138622.html)