WHY DO I NEED A KNEE BRACE?
First and foremost, a knee brace can reduce the chances of knee injuries happening in the first place. The hinges on the side of a knee brace allow the knee to bend and straighten through its full range of motion while providing support to the MCL and LCL. A knee brace can prevent your knee from bending or extending beyond its natural range, thereby significantly reducing the risk of damaging your ligaments and other structures of the knee from hyperextension. It can also absorb some of the impact from a crash or fall, reducing the shock to your knee.
Second, a knee brace can provide functions your knee has lost due to previous injuries. Used properly, it can reduce instability and provide support that is lacking. At the same time it can decrease the risk of re-injury or injury to other parts of the knee. For those who have had an ACL graft, a knee brace can reduce the stress on it significantly.