The relationship between knee weight bearing and body position 1.When lying down, the knee weight bearing is almost zero 2.When standing up and walking, the knee weight bearing is about 1-2 times 3.When going up and down slopes or up and down steps, the knee weight bearing is about 3-4 times 4.When running, the knee weight bearing is about 4 times 5.When playing ball, the knee weight bearing is about 6 times 6.When squatting and kneeling, the knee weight bearing is about 8 times When squatting and kneeling, the weight on the knee is about 8 times The state of the knee joint 1, before the age of 15, the knee joint is in the developmental stage, adolescent growing pains mostly occur in the vicinity of the knee joint. 2. Between the ages of 15 and 30, the knee joint is in “perfect condition” and works tirelessly. As long as the knee joint tissue is not damaged, it is basically not felt. 3, 30-40 years old, patellofemoral cartilage produced early mild wear, there will be a vulnerable period, short-term knee pain, lasting a few weeks to a few months, some people will not even notice. Patellofemoral cartilage is a layer of 3-5 mm thick transparent cartilage in the human knee joint, which can cushion the knee joint from the impact of sports; however, since patellofemoral cartilage has no nerve distribution, it will only sound an “early warning signal” during the vulnerable period before the full layer wears out. During this period, it is important to avoid strenuous exercise. From this time on, the knee joint can no longer be used as it pleases. 5. Between the ages of 40 and 50, the medial side of the knee joint tends to become sore after walking long distances, which is relieved by gentle hand rubbing. In the knee joint, the role of the meniscus is to cushion vibration and maintain stability; 60% of the body’s weight is supported by the medial side of the knee joint, so the degeneration of the medial meniscus also occurs earlier. Because of the nerve distribution in the meniscus, people can feel soreness and pain during the degeneration process. The arrival of this phenomenon reminds people that it is time to start taking care of their joints. 6, over 50 years old, the knee joint will feel obvious pain, this is because the patellar cartilage “life” has reached, the cartilage full layer wear, arthritis has been produced. This is the time to conserve the use of joints, reduce strenuous exercise, especially up and down stairs and climbing, and use crutches if necessary to reduce the pressure on the knee joint. Daily care for sore knees 1. Don’t walk for too long, and rest immediately when your knees feel uncomfortable. 2, do not do heavy exercise, such as running, high jump, long jump. 3, avoid half squat, full squat or kneeling position, such as squatting horse stance. 4.Do not do half flexion rotation of the knee joint to prevent half plate injury. 5, maintain the ideal weight to reduce the burden on the knee. 6, pay attention to the warmth of the knee, you can wear long pants, knee pads to protect the knee. 7, less heavy lifting, less wearing high heels. 8.Avoid trauma and overwork. The choice of shoes is important. 1, a pair of shoes that fit, not only can make you walk comfortably, but also can reduce the impact and pressure on the knee during exercise; 2, the instep part can be closely combined with the shoe, the width, length are appropriate, can correctly maintain the arches of the foot; 3, the weight of the shoe to light, the sole should not be too soft, and a little thickness; 4, the heel of the shoe can be about 2-3 cm high, the sole is too flat is easy to walk fatigue 5.Shoes with non-slip pattern on the sole.