Many people experience new symptoms and change in function of their knee, and it is important to know this is normal and common after ACL reconstructive surgery. This page is designed to give you an overview of what to expect, and the best evidence based management of your knee now and into the future.
Up to one third of people may experience symptoms, poor function or quality of life in the early years following their injury(1). The timing of onset and severity of symptoms varies, and it is poorly understood which individuals may experience symptoms. It is likely a large variety of factors (i.e. age, other injuries at the time of or after initial injury, being overweight, muscle strength, physical activity levels) play a part.
Knee osteoarthritis (OA) is a common musculoskeletal condition with incidence increasing with age. It is characterised by the presence of cartilage thinning, bone spurs/cysts, and narrowing of space between the joint.
Isn’t osteoarthritis just a normal part of ageing?
Now that you have had an ACL injury and surgery your knee is at greater risk of osteoarthritis (OA) development at an earlier age
Does surgery reduce my risk of osteoarthritis?
No, it restores the stability of the knee joint but it does not reduce the risk of OA.
Does running or playing impact sports after ACL injury increase my risk of osteoarthritis?
No, there is no evidence to suggest this relationship. Remaining physically active with your normal activities, within your functional capabilities is the most important consideration.
Do I need to be worried about the risk of osteoarthritis? 
No, osteoarthritis is not always associated with symptoms. I.e. 50% of people over age 75 have knee osteoarthritis on X-ray, however only 25% have knee symptoms.
However, further research into osteoarthritis following ACL injury is required to determine this relationship.