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The knee is one of the most traumatized joints of people participating in contact sports22 and injuries to this joint tend to have grave consequences. Often injuries to the knee complex require a longer loss of time from sports participation than most other injuries.24 Fifty percent of those athletes sustaining knee injuries during the 1975 to 1982 college football seasons missed more than 7 days of participation because of their injuries,23 and athletes that sustain knee injuries tend to have residual difficulties long after the initial injury.15Sports medicine professionals and researchers are aware of the vulnerability of the knee joint and have been searching for methods to protect it.