To avoid kyphosis, or a hunchback or dowager’s hump, first and foremost make sure that you are getting enough calcium into your body. Don’t wait until you are 50 years old to do this. Start early. Secondly, engage in specific kyphosis exercises, which should prevent you from developing a hump.
In addition, keep moving. If you sit too much, your abdominal muscles will weaken and the hamstrings in the back of your legs will tighten up. This makes a person slouch and develops a hump.