Hamstring tendinopathy is a breakdown of the tendon tissue where the hamstring muscles attach, most often at the sit bone in the buttock, or lower near the knee.

Trochanteric bursitis refers to pain over the bony bump on the outer hip (the greater trochanter), traditionally attributed to inflammation of the bursa there.

Hip osteoarthritis occurs when the cartilage cushioning the ball-and-socket hip joint gradually wears down, leading to pain and stiffness.

Bursae are small, fluid-filled sacs that cushion and reduce friction between bones, tendons, and skin around the knee.

Patellar tendinopathy, commonly called jumper's knee, is a breakdown of the tendon connecting the kneecap to the shin bone.

The meniscus is a piece of cartilage shaped like a C that cushions and stabilizes the knee joint. A tear can happen suddenly during a twisting injury or gradually as part of age-related wear.

Knee osteoarthritis (OA) occurs when the protective cartilage that cushions the knee joint gradually breaks down, leading to pain, stiffness, and swelling.