Tip Fasting Diets & Belly Fat Rebound Search Skip to content Menu Menu follow us Store Articles Community Loyal-T Club Loyal-T Points Rewards Subscribe to Save Search Search The World s Trusted Source & Community for Elite Fitness Diet & Fat LossEating Tip Fasting Diets & Belly Fat Rebound Do popular fasting diets set you up for future gains in abdominal fat Science is giving us clues Check this out by Chris Shugart March 8, 2017July 22, 2022 Tags BCAA, Diet Strategy, Losing Fat, Nutrition & Supplements, Tips Not Eating is the New Eating Several popular diets promote either fasting or intermittent fasting – eating only during a specific "window" of time during the day. Promoters of these diets often make a lot of health claims, but the main benefit is supposedly, "Ripped abs, bro!" But what about the long term effects? One study is giving us some clues. Two groups of mice were studied here. They were fed the same amount of food (after a short three-day dieting period). One group was given a day's worth of food and could nibble on it as they wished – the human equivalent of several small meals or eating instinctively. The other group was given the same amount of food but were forced to eat it in "one meal" or about a 4-hour feeding window – similar to some intermittent fasting plans for people. The fasting mice developed the mouse version of a beer belly – excess abdominal fat. Their bodyweights ended up the being the same as the control mice who nibbled during the day, but they greatly increased their intra-abdominal fat stores. They also developed gorging or binge-eating behaviors, developed insulin resistance in their livers, and "a gene expression profile favoring lipid deposition." Basically, their genes started "preferring" to store more fat, especially in the belly. In short, the intermittent fasting mice displayed a host of metabolic and behavioral abnormalities, including inflammation. The control mice who ate several meals per day did not. Why? The researchers found that glucose lingered in the blood of mice that gorged and fasted, meaning the liver wasn't getting the insulin message. "Under conditions when the liver is not stimulated by insulin, increased glucose output from the liver means the liver isn't responding to signals telling it to shut down glucose production," Dr. Martha Belury said. "These mice don't have type 2 diabetes yet, but they're not responding to insulin anymore and that state of insulin resistance is referred to as prediabetes. If you're pumping out more sugar into the blood, adipose is happy to pick up glucose and store it." Sure, it was an animal study, but it should give you pause if you're considering a fasting-based diet that limits your eating window for the day or encourages one big meal per day. The study also shows us that (once again), body composition is about a lot more than "calories in, calories out." The study subjects ate the same amount of calories, but the "eating window" mice got fatter and unhealthier. Human fasting-based diets are appealing to many, and they can be convenient and "fun," at least during the feeding window. But if people eventually develop the same issues as the mice, these plans could lead to fat loss followed by belly fat gain caused by various "metabolic miscues," as the researchers described them. But there are some smarter ways to go about it. Most of them are more like semi-fasts and involve protein pulsing. Check out The 5/2 Diet for Lifters. Kliewer KL et al. Short-term food restriction followed by controlled refeeding promotes gorging behavior, enhances fat deposition, and diminishes insulin sensitivity in mice. J Nutr Biochem. 2015 Jul;26(7):721-8. PubMed. Get The T Nation Newsletters Don' t Miss Out Expert Insights To Get Stronger, Gain Muscle Faster, And Take Your Lifting To The Next Level related posts Diet & Fat Loss Bodybuilding in a Low-Carb World Low-carb hype rules the day. Feeding the Ideal Body, Nutrition & Supplements Lonnie Lowery, PhD September 1 Eating The Best Weight Loss Food No, this weight loss food doesn't burn fat, but including it in your diet does lead to pretty-much effortless fat loss. Here's the science. Diet Strategy TC Luoma April 24 Eating Get More Out of Your Protein Everyone fights about how much protein to eat, but what really matters is how much protein you absorb. Here's how to soak up every gram. Diet Strategy, Feeding the Ideal Body, Nutrition & Supplements, Protein Chris Albert August 28 Eating The Food Combo That Makes You Fat Certain foods will dramatically impact whether or not fat is stored or burned. In fact, they'll totally change how your brain works and disrupt your metabolism. Diet Strategy, Dietary Myth Busting, Feeding the Ideal Body, Nutrition & Supplements Dr Jade Teta April 20