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.
Follow this plan exactly because physical therapy is a vital part of your recovery from a spinal fracture. As your spine heals, the physical therapist may have you do weight-bearing activities (such as walking or tennis) and/or weightlifting. These strengthen your bones. Spinal fractures can lead to poor posture, especially if you have multiple fractures (a problem in osteoporosis).