The answer to this question depends on what "weakest" means. If you're asking about the joint most prone to injury, the ankle is often considered the weakest. This is because the anterior talofibular ligament (ATFL), a key ligament in the ankle, is relatively thin and can be easily injured. About 70% of lateral ankle sprains involve the ATFL.
However, if you're asking about the joint with the least structural strength, the knee is often cited as the weakest. It's a hinge joint, meaning it only moves in one direction, and it's less stable than other joints like the hip. The knee also has a complex structure with many ligaments and tendons, making it vulnerable to injury.
Ultimately, the "weakest" joint is a matter of perspective and how you define weakness.
