Which of the following is the primary risk factor for the development of osteoarthritis?

Obesity is a significant risk factor for the development of osteoarthritis, especially in weight-bearing joints such as knees and hips. Excess body weight increases stress on the joints, leading to cartilage damage and joint degeneration.

a. Regular physical activity is generally beneficial for joint health and may help prevent osteoarthritis.
b. Young age is not a risk factor for osteoarthritis; it is more common in older adults.
c. Family history of osteoporosis is not directly linked to osteoarthritis; however, a family history of osteoarthritis itself may increase the risk.

Osteoarthritis is characterized by the breakdown of articular cartilage and changes in the underlying bone. It primarily affects the joint structures, leading to pain, stiffness, and loss of joint function.

a. The synovial membrane and tendons are involved in other joint diseases such as rheumatoid arthritis and tendinitis, not osteoarthritis.
c. Ligaments and bursae are important for joint stability and movement, but they are not primarily affected in osteoarthritis.
d. Muscles and nerves can be affected indirectly due to joint changes in osteoarthritis, but they are not the primary structures involved in the disease process.