The knees are the largest joints in the human body. It is a hinge joint made by joining three bones known as the Shinbone or tibia, the Thighbone or Femur, and the Kneecap bone or Patella. Healthy individuals have functional supporting tissues if the knee joints like cartilages and ligaments, which help maintain joint stability. However, these structures may deteriorate over time due to aging and overuse, leading to knee weakness. The most common causes of Knee Weakness include Osteoarthritis, Q