Eating breakfast can help you burn more carbs when you work out

This is the first study to show that breakfast speeds up the clearance of glucose.

ISLAMABAD (Online): What you should know before you hit the gym or the trails in the morning. Eating breakfast before a workout can help your body burn carbohydrates during the sweat fest, and more quickly digest food after it, according to a recent study. “This is the first study to show that breakfast speeds up the clearance of glucose out of the bloodstream and into muscle after we eat lunch, even when we perform exercise in-between breakfast and lunch,” Javier Gonzalez, PhD, co-author, and senior lecturer at the Department for Health at the University of Bath in the U.K, told Healthline.

What did the study find?

Researchers led by a team at the University of Bath looked at 12 male adults who ate porridge with milk two hours before cycling for an hour, and compared it to those who fasted overnight before the ride. They found that those who ate boosted the rate at which they burned carbs during the workout. Those who ate also increased the rate that their bodies digested and metabolized food after a workout as well. “We found that, compared to skipping breakfast, eating breakfast before exercise increases the speed at which we digest, absorb, and metabolize carbohydrates that we may eat after exercise,” Gonzalez said in a statement. The study was published last month in American Journal of Physiology: Endocrinology and Metabolism. Researchers said that the carbs burned during exercise were not just coming from the breakfast eaten — but also from the carbs stored in muscles as glycogen. This increase in the use of muscle glycogen may explain why there was more rapid clearance of blood sugar after lunch when breakfast had been eaten before exercise, he said. Gonzalez noted that previous research found rest and eating breakfast can alter the way we metabolize lunch. Eating a breakfast high in fat, protein, or carbs would likely produce a different response, Gonzalez explained. Research has shown that a high-fat breakfast impairs blood glucose control at lunch time, which is the opposite response to eating a high-carb or high-protein breakfast. Most of the research on that was conducted when people rested afterwards, not when they exercised. Gonzalez noted that the study was small but tightly controlled. Both Gonzalez and outside researchers would like to find out more about the effects of fasting and eating with regards to working out on other populations, such as women, or those who are overweight and obese. “More research is necessary before we can make definitive conclusions regarding the impact of eating before exercise has on health outcomes and our physical well-being,” Rachel Stahl, RD, a registered dietitian from New York City, told Healthline.

What to eat, when to eat

Lizzy Swick, RDN, a nutritionist from New Jersey, noted that skipping breakfast can have positive effects on insulin levels, blood sugar control, weight, energy levels, and inflammation for some people. But she noted that everyone is different. “While the science is clear that it might help with certain populations of people, there is no one-size-fits-all approach to nutrition, so I don’t advise this for everyone,” Swick said. For people who want or need breakfast, she recommends eating a protein- and fat-based meal within one hour of waking up. “Choose lower-glycemic carbs in the morning such as non-starchy veggies, berries, herbs, or citrus,” Swick added. Keeping breakfasts heavier on healthy fats and protein and saving carbohydrate-rich foods like starchy vegetables, grains, legumes, and fruits for later in the day is beneficial to keep blood sugar and insulin levels lower for more of the day, she added. It can control appetite, curb cravings, and better control cortisol patterns. That can include eggs with some non-starchy vegetables and some avocado, or having whole-fat yogurt with chia or flax seeds and low-glycemic berries. People can also try a green smoothie, but don’t add honey or sugary fruits such as mango or banana. Pea, whey, and collagen are good protein add-ins. Instead of breakfast, you can also try a snack before working out, such as half a banana with almond or peanut butter on it, or a handful of nuts. “Whether you are eating or not before a workout, aim to have a balanced meal or snack that contains protein within 30 to 60 minutes post-exercise,” Swick said. “Low-level aerobic activity like walking before breakfast can tap into your ‘fat-burning zone’ and boost your fat burn, and you might feel better saving more intense workouts for later in the day, if your schedule permits.” Consume these snack or meal 45 minutes before exercising, whatever you eat, so the body has time to digest the food, Stahl added.