In middle school, I was playing racquetball at the YMCA, pivoted to hit the ball and something in my knee popped and it hurt like hell. Turned out to be a combination of lack of cartilage and Osgood-Schlatter disease (a painful lump just below the kneecap). The lump corrected itself, as it’s something weird to do with bone growth in child development, but the cartilage deficiency is still a problem today. I can’t do a lot of running or jumping or even kneeling.
In middle school, I was playing racquetball at the YMCA, pivoted to hit the ball and something in my knee popped and it hurt like hell. Turned out to be a combination of lack of cartilage and Osgood-Schlatter disease (a painful lump just below the kneecap). The lump corrected itself, as it’s something weird to do with bone growth in child development, but the cartilage deficiency is still a problem today. I can’t do a lot of running or jumping or even kneeling.