Why do knees crunch?
Cartilage tissue lies between the two bones, reducing the friction created by walking between the bone tissue, but gradually the cartilage tissue loses its protective properties and the friction cannot be avoided.
Crunching can occur when carrying heavy loads, where cartilage tissue deforms from the increased load. Great stress on the knee comes from awkward shoes with a high heel, so at times you have to make a choice between healthy shoes with a small heel, or a spectacular one with a big rise.
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