Is Squat Injury or Construction to Knee? Understand the knee joint and the surrounding muscle groups. Let's briefly understand the knee joint first. Mainly located between the thigh and calf, a bit like a hinge-like knot. It can be bent and locked until it is fully extended. It is composed of seven different types of organizations: 1. Bone: The bone structures that make up the knee joint are femur, patella and tibia. 2. Ligament: Connects fibrous connective tissue between bones to provide stability and integrity for joints. Knee ligament is divided into eight medial parts and six medial parts. 3. Muscle: The knee joint itself has no muscle tissue, but the muscles acting on the knee joint are all around the outside of the knee. They have quadriceps muscles that connect the front of the thigh, biceps brachii and hamstring muscles at the back of the thigh, and some muscles that can help the joints bend or rotate inward. 4. Tendon: a fibrous band connecting muscles and bones. The four extensor muscles of knee joint and extensor muscles form a common tendon, quadriceps femoris tendon, which connects femur and tibia. 5. Synovial bursa: It is a kind of cystic structure near the friction area, which is mainly used to slow down the friction between bone surfaces. 6. Adipose tissue: A special connective tissue, composed of fat cells, used for filling. 7. Articular cartilage: Because the upper end of tibia is flat and the femoral condyle is round, there is a meniscus on the left and right sides of cartilage, which can absorb the pressure of joint activity.
Composition around the knee joint! ? A study on the stability of nayasaveralive knee joint Dr. Karl Klein's initial research claimed that squatting would stretch the knee ligament and eventually make it unstable. However, in their own research, the researchers used the testing tools of Dr. Carl Klein at that time, and finally their research results were inconsistent with Dr. Carl Klein's research report. Scientific fact shows that squat can protect knee joint by increasing muscle stability. In 1986, the researchers compared the knee stability of weightlifters, basketball players and runners. After squat training, the knees of weightlifters are actually more stable than those of basketball players (who have just practiced for more than an hour) and runners (who have run 10 km).
When we squat, our knees will produce two forces: shear force and compression force. So theoretically, most of the injuries caused by squatting are caused by excessive stress. Some medical authorities claim that squatting on the knee increases the compressive force, which will lead to the wear of the cartilage on the back of the meniscus and patella. Although the increase of oppression will lead to greater injury sensitivity, such causal relationship is not established in scientific research. If this is true, then we should see many arthritis symptoms in weightlifters and their knees. Fortunately, this is not the case. Long-term squat weight training shows little evidence of knees. In fact, compared with you and me, people who take part in weightlifting have much healthier knees.
Most of the injuries caused by knee squats are caused by excessive oppression. What pressure does the squat angle have on the knee? As we mentioned, when squatting, the knee will produce shear force and compression force. Now let's use a chart to illustrate what kind of pressure is exerted on your knees when you squat to which angle. According to this chart, the forward shear force is as high as 0-60 degrees (compressing the anterior cruciate ligament), while the backward shear force starts from the knee flexion of about 50 degrees and reaches the maximum at 90 degrees (the maximum stress on the posterior cruciate ligament). The compressive force seems to be much higher when squatting, and the compressive force is the highest in the range of 90- 130 degrees. This is partly due to the surface contact between femur and patella, and also due to the fact that when we squat further, the pulling force changes from quadrilateral to angle. Many studies show that squatting is the greatest compression force of knee joint, regardless of the approximate winding effect of squatting and soft tissue on gastrocnemius muscle. We can see that our knees are bent. When we squat, the different surfaces of the femur and patella are under pressure during the whole exercise. At first, when squatting (knee flexion 0- 10 degrees), the patella did not contact the femur. When you bend your knees 10-20 degrees, you begin to touch the femur and patella. Initially, the contact surface area between femur and patella was very small. When we descend to squat and reach the maximum at 90 degrees, the bone contact surface area increases, and after 90 degrees bending, the bone contact surface area will decrease.
Different faces of femur and patella are compressed during the whole squat movement! ? Diaryofafitmommy, what kind of pressure does the squat angle have on the periphery of the knee! ? Knee injury in bodybuilding squat: Practicing full squat stroke is actually a very good range of motion for the knee. Why is half squat bad for the knee? The first thing we should see is that the muscles around the knee can keep the knee stable. When you are doing a squat, you are also exercising a lot of quadriceps femoris (thigh muscles), which pull your knees from the front. However, the semi-squat largely ignores the hamstring muscles and hip muscles (leg back muscles) that pull the knee from behind, which will lead to knee problems due to imbalance and instability. Therefore, when you do a complete squat, it is not only effective for quadriceps femoris, but also the hip and biceps femoris can provide more balanced tension for the knee, so it can bring greater stability to the whole. Many people think squatting is bad for their knees. Another reason is that they didn't take the time to learn the correct movements and postures, but they still gained too much weight and then hurt themselves. Finally, they blamed the injury on squatting. I really don't know that the real reason for their injuries lies in their wrong posture and habits.