Physical therapy often begins within a week of the first visit with the doctor. Sometimes there's a longer wait time between injury and the start of rehab. Most research shows early rehab is best. The therapist can help reduce swelling in those early days.

After injury patients stop putting weight on the leg and stop moving the knee. The result is a very quick loss of muscle strength. The muscle will start to atrophy in the first two weeks. This sets up a complete change in the way the knee moves. Nerve messages to the muscle change. The muscle loses its normal activity pattern and becomes dyskinetic.

Dyskinesia refers to altered muscle activity patterns and incoordination. These types of changes can result in another knee injury. It's a good idea to see the therapist as soon as possible.