Typically following orthopaedic surgery, a period of gradual rebuilding is required to help the injured area return to full function. This starts often quite early after the surgery and involves progressing to the right exercises at the right time. Often going through several different phases as the person improves.
This can be a long process and returning to physical activity may vary depending on the individual’s goals and previous level of function (e.g. what work, hobbies or sports they enjoy).