When you start a weight loss program you should eat less calories than you burn. That means you should eat less and work out more. Neither eating less nor making exercises are not something you are born it, you have to fight hard to keep up with the program.
This means you can get very fast distracted and failing, or if something goes wrong in your life you may have no power to fight against your stomach craving for food and you lack of energy to do the daily exercises. [...]