Knee squats are part of normal daily life, and in moderation have little effect on the knee, but repeatedly or for long periods of time are likely to have adverse effects. Because in the process of doing squatting, the knee joint wear and tear, contact surface, friction are increasing, and the ligaments and muscles around the knee joint are gradually strained, and the meniscus is also more extruded at this time. Older people or those with the above mentioned tissue damage are prone to arthritic knee pain, or the recurrence of the original underlying lesion, or even further aggravation. In such cases, knee pain can occur as soon as the squatting activity is done, indicating that the injury has already occurred, so avoid these movements as much as possible.