There is no doubt that physical fitness is a good thing. It means you are healthier, and it also helps you to look good in the bargain. However, there are many factors that will affect your level of physical fitness. Some of these factors are genetic, and can be difficult to change. Others are things like your environment or even the people around you which you can change easily enough. Ultimately, if you want to improve your physical fitness levels there are still plenty of things that you can do about it.