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Knowledge center. The knee is a complex structure and one of the most stressed joints in the body. It is the largest joint, vital for movement, and vulnerable to injury. The knee is the most commonly injured joint by adolescent athletes with an estimated 2.5 million sports-related injuries annually. Many knee injuries can be successfully treated with simple measures, such as bracing and strengthening exercises. Other injuries may require surgery to correct.
A knee sprain simply means that one of the knee ligaments has been overstretched and that some or all of the fibres have been damaged. This usually occurs when there is a force through the knee eg a tackle in sport or sudden twisting of the knee eg when falling awkardly.ere we will look at the most common causes of a knee sprain and which ligament tends to be affected: 1) ACL Sprain: Sudden twisting or hyperextension (the knee bending back too far). 2) PCL Sprain: Force through a bent knee e.g. a fall onto a bent knee, car accident where the knee hits the dashboard.