Answer:
4 months minimum, and 8 months are the maximum time period from which you have to refrain from any physical activity that's related to sports.
Explanation:
Most commonly after MPFL reconstruction, you will be placed in a knee immobilizer that holds the knee straight for the first two weeks after surgery.
Most people can generally return to sport or play sometime between 4 to 7 months after MPFL reconstruction. If you are considering the surgery, be aware than recovery times may vary and can be dependent on your individual anatomy, capacity to heal and general health prior to surgery.