Finishing a half- or a full marathon requires methodology and training.
An effective training plan must be well integrated in the every-day routine, maintaining a good balance and without creating too many constraints.
We strongly advise not to multiply brutally your weekly training sessions from 3 to 6. The frequency raise in training races must be progressive (from 3 to 4 weekly, for instance). If the contrary, risks suffering repeated injuries which will stop his/her progression.
We also recommend following a healthy diet and adapting your food intake according to your efforts.