A tear in knee cartilage is often caused by which movement?

• A. Pivoting too hard can cause tear in knee
• B. Lifting heavy objects causes knee tear
• C. Running on a flat surface causes tear
• D. Resting heals tear

Answer: (A)

Pivoting sharply while the knee is bearing weight puts twisting stress on the knee joint and can pinch and shear the cartilage (the menisci), making a tear likely. The other scenarios don’t fit as well: lifting heavy objects mainly stresses muscles, tendons, and ligaments rather than causing a cartilage tear; running on a flat surface can lead to overuse problems or other knee issues but is less likely to cause a sudden cartilage tear; resting alone doesn’t reliably heal a cartilage tear because the cartilage has limited blood supply, so symptoms may ease but the tear often persists.