Overexertion can cause repetitive trauma to the cartilage. In overexertion, the surrounding muscles become fatigued, and the joints are forced to face increased loads. Joints are designed to accommodate temporary increases in load but-despite their elegant design, they do have limits.
Lifting too much weight while squatting, jumping onto a very hard surface, or other sudden increases in load on a joint can lead to cartilage injury. As with other injuries, once the cartilage is damaged, it is more likely to suffer subsequent damage.
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