Physical fitness is a measure of the condition of the body to perform during activities of daily living (light, moderate, and strenuous), formal exercise (like when you work out), and emergencies (as when you must escape from danger like a fire). The physical fitness of our nation is declining, proved by the rising rates of obesity , diabetes , some types of cardiovascular disease, and other medical conditions. To improve physical fitness, one must "practice," or work out. Emphasis should be on improving aerobic conditioning (stamina or endurance), muscular strength and endurance, and flexibility. The types of exercise necessary to do this are described next.
When pain is extreme or bones continue to move, or if there is nerve root or spinal cord damage related to the spondylolisthesis, surgery can sometimes help. Surgery may be done to remove bone or other tissue to take pressure off the spinal cord or nerves (decompression). Or surgery may be done to fuse the bones in position. Sometimes both decompression and fusion are done during the same surgery. After any of these surgeries, you may need to wear a cast or back brace for a while. Later, rehabilitation therapy will help make your muscles stronger and movement easier.
The effects of DDT and PCBs are often hidden, and often don’t occur until many years later in the offspring of these exposed animals. Birds are born with twisted bills or deformed reproductive organs. Other animals have physical characteristics of both male and female, but can’t function normally as either one. The reason DDT and PCBs were outlawed was that they don’t break down; they persist unchanged in the environment for years and years, still capable of the same trauma to living cells. These chemicals simply don’t degrade.