Hell Week: Guide on Intermittent Fasting, HIIT Workouts, and how to change your habits in a course of a week.

Whipping your body into shape, especially when you hope to achieve this quickly, can be one of the toughest challenges you ever face. But it can also be one of the best things you ever do for yourself.Everything from your mental health, physical health, and relationships can be drastically improved by getting fit.The product of intensive research, this book shares invaluable knowledge on three key factors when it comes to fitness: exercise, diet, and mental strength.