Mike Banner’s The Okinawa Flat Belly Tonic System PDF download ( full version). If you have wondered whether it’s best to exercise in a fasted state, before eating breakfast, or to eat breakfast and then have your workout session, I will weigh in here. For years we have been told breakfast is the most important meal of the day and you must eat a good, nutritious breakfast in order to have the best exercise session. But is that really true? Here are a few benefits of exercising in a fasted state which just means, before you eat your breakfast or whatever your first meal of the day ends up being if you intermittently fast.