Osteoporosis and Arthritis: Two Common but Different Conditions

Many people confuse osteoporosis and some types of arthritis. This fact sheet will discuss the similarities and differences between these conditions.

Osteoporosis

Osteoporosis is a major health threat for 44 million Americans, 68 percent of whom are women. In osteoporosis, there is a loss of bone tissue that leaves bones less dense and more prone to fracture. It can result in a loss of height, severe back pain, and a change in one’s posture. Osteoporosis can impair a person’s ability to walk and can cause prolonged or permanent disability.

Risk factors for developing osteoporosis include:

* thinness or small frame
* family history of osteoporosis
* being postmenopausal, and particularly having had early menopause
* abnormal absence of menstrual periods
* prolonged use of certain medications, such as those used to treat diseases like systemic lupus erythematosus, asthma, thyroid deficiencies, and seizures
* low calcium intake
* physical inactivity
* smoking
* excessive alcohol intake.

Osteoporosis is a silent disease that often can be prevented. However, if undetected, it can progress for many years without symptoms until a fracture occurs. Osteoporosis is diagnosed by a bone mineral density (BMD) test, which is a safe and painless way to detect low bone density.

Although there is no cure for the disease, several medications have been approved by the Food and Drug Administration to prevent and treat osteoporosis. In addition, a diet rich in calcium and vitamin D, regular weight-bearing exercise, and a healthy lifestyle can prevent or lessen the effects of the disease.

Arthritis

Arthritis is a general term for conditions that affect the joints and surrounding tissues. Joints are places in the body where bones come together, such as the knees, wrists, fingers, toes, and hips. The two most common types of arthritis are osteoarthritis and rheumatoid arthritis.

* Osteoarthritis (OA) is a painful, degenerative joint disease that often involves the hips, knees, neck, lower back, or the small joints of the hands. OA usually develops in joints that are injured by repeated overuse from performing a particular task or playing a favorite sport, or from carrying around excess body weight. Eventually this injury or repeated impact thins or wears away the cartilage that cushions the ends of the bones in the joint. As a result, the bones rub together, causing a grating sensation. Joint flexibility is reduced, bony spurs develop, and the joint swells. Usually, the first symptom of OA is pain that worsens following exercise or immobility. Treatment usually includes analgesics, topical creams, or nonsteroidal anti-inflammatory medications (known as NSAIDs); appropriate exercises or physical therapy; joint splinting; or joint replacement surgery for seriously damaged larger joints, such as the knee or hip.

* Rheumatoid arthritis (RA) is an autoimmune inflammatory disease that usually involves various joints in the fingers, thumbs, wrists, elbows, shoulders, knees, feet, and ankles. An autoimmune disease is one in which the body releases enzymes that attack its own healthy tissues. In RA, these enzymes destroy the linings of joints. This causes pain, swelling, stiffness, malformation, and reduced movement and function. People with RA also may have systemic symptoms, such as fatigue, fever, weight loss, eye inflammation, anemia, subcutaneous nodules (bumps under the skin), or pleurisy (a lung inflammation).

While osteoporosis and OA are two very different medical conditions with little in common, the similarity of their names causes great confusion. These conditions develop differently, have different symptoms, are diagnosed differently, and are treated differently. While it is possible to have both osteoporosis and arthritis, studies show that people with OA are less likely to develop osteoporosis. On the other hand, people with RA may be more likely than average to develop osteoporosis. This is especially true because some medications used to treat RA can contribute to osteoporosis.

Osteoporosis and arthritis do share many coping strategies. With either or both of these conditions, many people benefit from exercise programs that may include physical therapy and rehabilitation. In general, exercises that emphasize stretching, strengthening, posture, and range of motion are appropriate. Examples include low-impact aerobics, swimming, tai chi, and low-stress yoga. However, people with osteoporosis must take care to avoid activities that include bending forward from the waist, twisting the spine, or lifting heavy weights. People with arthritis must compensate for limited movement in affected joints. Always check with your doctor to determine if a certain exercise or exercise program is safe for your specific medical situation.