Osteoarthritis, also called degenerative joint disease, occurs when the joints in the knee become worn. Osteoarthritis is the most common form of arthritis and primarily affects the elderly and the obese, although a knee injury can cause the condition, reports the American Academy of Family Physicians. High-impact sports and repetitive motion also can cause osteoporosis of the knee.
Stationary Bike
Stationary bikes are a good low-impact aerobic exercise that can help prevent the disease and help people who are beginning to develop arthritis in the knee. The Arthritis Foundation reports that indoor cycling is an effective means of getting an cardiovascular workout without placing undue stress on the knees. Additionally, cycling improves flexibility and increases leg strength. Increasing the length of workouts on the bike also can help to build endurance.
Walking
Walking is one of the most popular forms of exercise; it builds muscle strength around the knees and helps to maintain flexibility. The Arthritis Foundation recommends walking for prevention of knee osteoarthritis. It is also beneficial for those who have already contracted the disease. To receive the most benefits from walking and to avoid injuries or strain, you should wear good walking shoes that fit correctly and that keep your feet in the correct position while walking. Look for shoes with good arch support that help to keep your feet aligned.
Swimming
Swimming and water aerobics are low-impact exercises that provide additional benefits, such as strength building from the resistance of the water. Swimming and water exercises are especially beneficial if you are beginning to feel stiff and have trouble moving your knees because of the onset of arthritis or other medical conditions. Swimming and doing exercises in warm water helps to soothe the joints and muscles and relieves painful symptoms. Very little stress is placed on the knees while you work through range-of-motion exercises in the water and swim laps.
