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 toilet 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 is 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 of the knee joint in daily life can have a positive effect on stabilizing the knee joint and preventing sports injuries.