Intermittent fasting narrows your eating windows into a few hours, and limits caloric intake for the rest of the day. Common methods of intermittent fasting are the 16:8 (in which a 16-hour window of fasting is followed by an 8 hour eating window), alternate-day fasting, overnight fasting, and 5:2 fasting in which you can eat normally five days a week but restrict your calorie intake for two days of the week. As hunter-gatherers, our bodies are programmed for short-term fasts. During fasting periods, the body exhausts its blood glucose, then turns to the digestive system for food, and finally, starts burning body fat. By restricting our food intake, it forces our body to use fat as its source of energy.
Don't worry, fast days don't necessarily have to be 100% food-free. Your doctor can help to create a specific fasting plan for you, but in general, your caloric intake should be restricted to ~200-300. Snacking on veggies and low-calorie foods like yogurt, drinking coffee and tea, and taking supplements can help you to retain some of your sanity and satiate cravings. Additionally, your body adapts. Many people find fasting regimens difficult at the beginning until they get used to this new style of feeding their bodies. There is no one-size fits all solution to fasting.
During eating windows, you may be able to maximize your results by following the keto-diet and eating a healthy meal. This diet is characterized by low-carb foods that are high in healthy fats, as well as getting an adequate amount of protein. This helps to jump-start ketosis, a metabolic state that forces your body to burn fat for fuel rather than carbohydrates because your body is deprived of glucose.
So, how can you make sure that you're alert and energized throughout the fasting day without your daily caramel latte or mid-day snack? Here are some tips.
How to Retain Your Energy During a Fast (Especially when you’re just starting out).
