When you were younger, you should have observed that is was easier for you to achieve and maintain a perfectly fit body than now that you started growing to be an adult. Playing around, like running around the room, jumping and skipping from corner to corner, is the natural activity that keeps you healthy when you were young. It was a good form of exercise that does not let you notice the difficulty of physical training. Add to these the compulsory physical education programs in school that enforces activities to maintain fitness. Now that you have grown, the p90x fitness program is the counterpart of playing around when you were younger. It can get you fit without feeling obliged to do so.
As you grow old, the metabolic rate of your body decreases which causes the slow breaking down of the food that you eat. Add to this the stagnant lifestyle that you have, you will certainly be physically unfit sooner or later. To avoid this from happening, you can turn to the p90x workout plan as your grown-up play time. Doing the p90x workout can let you be fit without noticing the difficulty of the exercise.
Keep in mind that as you grow older, it is more important to keep yourself physically fit. The main reason for this is to keep you far from any kind of disease. A fit person is a healthy person and a healthy person is protected from sickness. Take good care of your health with regular p90x workout.