Although there are several conditions which may lead to the need for knee replacement, arthritis (whether it be osteoarthritis, rheumatoid arthritis or traumatic arthritis) is the most common reason. A number of other factors contribute to joint disease including genetics, developmental abnormalities, repetitive injuries and obesity.
According to the National Osteoporosis Foundation, the best exercises for building and maintaining bone density are: 1  Weight-bearing exercise, such as walking, that makes you work against gravity while staying upright.hese studies show that people with higher levels of vitamin D have... Although people with osteoporosis may believe that exercise increases the risk of injury from broken bones, the truth is quite the opposite.
Exercise has long been known to strengthen bones. But even if you already have osteoporosis, exercise can be good medicine. You may not realize it, but the health of your bones is closely linked to your workouts and daily habits.