The knee joint absorbs forces of up to 4-6 times your body weight during activities like climbing stairs or running. Over time, this repetitive loading can accelerate the breakdown of articular cartilage, the smooth tissue that cushions the ends of the femur, tibia, and patella. When cartilage wears thin or becomes damaged, the resulting bone-on-bone contact triggers inflammation, swelling, and the pain that many patients experience.
Biomechanical imbalances elsewhere in the kinetic chain compound the problem significantly. Weakness in the hip abductors, tightness in the iliotibial band, or excessive foot pronation can shift the mechanical axis of the knee, concentrating stress on areas not designed to bear it. For patients where excess weight is contributing to knee stress, weight loss management can significantly reduce the load on your knee joints.
The knee's stability also depends on ligaments and the menisci, two C-shaped cartilage pads that distribute load across the joint surface. When these structures are weakened by prior injury, repetitive strain, or age-related changes, the joint becomes less resilient to everyday forces, creating a cycle of inflammation and compensatory movement that progressively limits function.
