For a meniscus injury and ligament tear in the knee joint, if the condition is not very severe, we can manage it with conservative treatment. This means using immobilization, physical therapy, heat application, and anti-inflammatory pain relief.

If the knee has been immobilized for a period, say two months, it will obviously become somewhat stiff. In this case, if rehabilitation is to be performed, the first step should be to seek guidance at a formal rehabilitation medical institution. If a therapist is available to assist with training, that would be the ideal best case scenario. If no therapist is available, care must be taken during activities not to excessively tear the healed ligaments or meniscus. During the rehabilitation process, when performing bending and flexing exercises, it's crucial to be mindful of the extent of movement.

Additionally, it's important to consistently strengthen the quadriceps muscles.