The knee joint is one of the complex joints in the human body and is the main stable support and motion joint of the body. It is composed of two links: the femoro-tibial joint and the femoro-patellar joint. The main physiological activity of the knee joint is flexion and extension, ranging from 0° to 150°, with mild internal and external rotation during flexion and extension. Because it is the primary motion joint, it is susceptible to acute and chronic injuries of a motor nature. In addition to various pathological and traumatic sports injuries, chronic inflammation of the joint is the most common. In everyday life, it is inevitable to do a variety of squatting movements, the most common being going to the bathroom and squatting to pick up objects, but also including the barbell, dumbbell and other exercise movements involved in improving the strength of our lower limbs when we engage in fitness. Have you ever considered whether your squatting movements are reasonable? Is it a potential risk action for some knee strain injuries? The stability and strength of the knee joint are directly related to the strength of the muscles around the joint and their coordination with each other. Therefore, strengthening the strength and proprioceptive exercises of the muscles around the knee joint through a combination of functional movements in the daily life of the knee joint can have a positive effect on stabilizing the knee joint and preventing sports injuries. What problems can be caused by incorrect squatting movements Usually, we are used to squatting movements where the knees protrude forward, the hips do not bend, and in some cases where ankle mobility is limited, the heels are lifted up. Or two knees in addition to the front protrusion, but also inward buckle, the way the two legs squeezed together, especially in the weighted half-squat action is more so. If the above actions occur frequently in life or at work, the knee is prone to wear and tear or meniscus wear, and the medial and lateral collateral ligaments of the knee joint can be overstretched and become strained. This damage to the knee joint can lead to joint swelling or pain, which can affect normal standing, walking or running. As people age, the muscle strength around the knee joint will naturally decline, increasing the wear and tear between the patella and meniscus in the joint, making it easier to develop chronic strain on the knee joint in old age. Commonly wrong squatting action We have a few common states from life to see what will happen to the wrong squatting it. 1, the front protruding squat wrong action: squatting, the two knees protrude forward, more than the toes. Hazard: This posture increases the burden on the knee (patella), the femur and tibia will over squeeze the knee. Correct posture: squatting, bending knees and hips, hips back, as to sit on the chair action, the knees can not exceed the toes. 2, the front protrusion + buckle squat wrong action: squatting, the two knees protrude forward, more than the toes, while the two knees inside the buckle. Hazard: This posture increases the burden on the knee (patella), the femur and tibia will over squeeze the knee, at the same time, the pressure on the internal and external collateral ligaments of the knee joint is also greater. Correct posture: when squatting, bending the knees and hips, the hips move back, as if to sit on a chair action, the knees can not exceed the toes, while the knee joint is flared.