Carb cycling allows you to still eat carbs without adding body fat, and it helps you burn fat as fuel. Here's how to do it. What Is Carb Cycling? Carb cycling, also known as the intermittent low-carb diet, is a method of eating carbohydrates in which you alternate how many carbs you eat each day—high, moderate or low—based on your workouts and long-term goals. The thinking is that your low-carb days put you in a fat-burning state and eating high-carb boosts your metabolism. Carbohydrates are the body's main and preferred source of energy. Low-carb diets have long been followed for weight loss, and research shows that compared to low-fat diets, low-carbohydrate diets can lead to greater weight loss in the short term. The caveat is that low-carb diets are difficult for most people to follow long-term. It's also tough to eat low-carb if you exercise frequently, and low-carb diets are difficult for endurance athletes and bodybuilders who rely on carbohydrates to fue...