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.
Walking and using a stationary bike are two good aerobic exercises if you have COPD. Strengthening exercises involve tightening muscles until they begin to tire. When you do this for the upper body, it can help increase the strength of your breathing muscles. Breathing exercises for COPD help you strengthen breathing muscles, get more oxygen, and breathe with less effort. Here are two examples of breathing exercises you can begin practicing. Work up to 5 to 10 minutes, three to four times a day. Pursed-lip breathing: