There are many reasons why people start the P90X home program, some will be wanting to increase muscle tone and definition, maybe they are planning a holiday and want to show off their new physique when on the beach, for others it will just be about increasing their cardio vascular levels and to get a little bit fitter in the process, for another set of people it might just be that they want to eat a balanced diet that takes care of their body whilst undertaking exercises. Whatever the reasons behind why people embark on this tried and tested 13 week program one thing is for sure, most people like it and find success in the way that they hoped they would. The P90X product itself would not have sold in the volumes it has since it was launched way back in 2003, thankfully Tony and his team brought a truly revolutionary fitness regime to the marketplace.