The knee joint provides mobility and stability for your legs during walking and running activities. However, these functions can be compromised if the knee is injured. With the increased popularity of and participation in sports and fitness activities, the number of knee injuries has increased. The severity of these injuries varies from mild strains (injury to a muscle or its tendon, which connects muscle to bone) or sprains (injury to a ligament, which connects two bones) to complete tears of the ligaments and other soft tissue structures of the knee. The anterior cruciate ligament is located in the center of the knee and holds the femur and the tibia in place. The anterior cruciate ligament attaches from the back of your femur to the front of your tibia. The anterior cruciate ligament prevents these bones from moving backward and forward or side to side. The anterior cruciate ligament is made up of two intertwining ligaments working together yet performing different jobs. One ligament keeps the femur and tibia in place when the knee is flexed and the other ligament tightens to hold the bones together when the knee is extended or straightened out. The anterior cruciate ligament is one of the most important ligaments to athletes because of its main function, stabilization of the joint while decelerating.
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