When we close our eyes, we rely on middle ear balance and these special receptors to keep us upright. If there has been swelling or injury in or around a joint, these tiny receptors get injured and do not recover. You can do certain exercises to get the other receptors to do more, regaining what was lost with the damaged receptors. The loss of position sense puts the joint at further risk of injury because the joint loses stability, like having loose lug nuts on a wheel of a car. You can think of these exercises like balance training.
Some therapists use special manual exercises to get the other receptors working better.
As your condition keeps getting better, you will be given advanced exercises to do at home or in a gym setting. You will recheck with your therapist at regular intervals to make sure you are doing these exercises routinely and safely. During these rechecks, you may be given additional exercises to work on over the next few weeks. Eventually you will be progressed to a final home program. Once you've been released to full activity, you may be instructed to follow up with a few visits over the next few months.