The main mantra of fitness is to do situps, quite often. After that the next mantra which is very much suitable to every age is chin ups. These two mantras lift your body in a very good shape.
The next mantra is to eat healthy food, when you have no tension and you are financially sound then you can easily be able to make your body shape by spending your income on it.
I have seen people who are very fond of doing bodybuilding but due to financial problems they lack such habits or they are unable to fulfill their desires. The best mantra of bodybuilding is to have a brisk walk every day, its like a mantra of getting yourself warm up before striving exercises of bodybuilding. Warm down and warm are the mantras before and after bodybuilding