Exercise Before Breakfast: A Smart Start to a Day - Kaldzar
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Why It’s Better To Exercise Before Breakfast

Sunrise Exercise. Photo by Andrea Piacquadio.

Why It’s Better To Exercise Before Breakfast

Exercise is recommended for people who are overweight or obese as a way to reduce their risk of developing type 2 diabetes and cardiovascular disease. But people don’t always have time to exercise as much as they would like. Therefore, finding ways to increase the health benefits of exercise is important. Our latest research has found a way to do just that, and it’s to do with timing. This means you might be able to get away with doing less exercise if other commitments, such as family and work, always seem to get in the way.

To explain how this works, it helps to know a bit about insulin. Insulin is a hormone that helps control blood sugar levels. One of insulin’s main effects after a meal is: it allows sugar in the blood to transport into muscle. The muscles then use the sugar as fuel for energy or store it for later use.

Insulin Sugar Syringe. Photo by Myriam Fotos.

When people don’t exercise enough and become overweight or obese, their bodies have to produce more insulin for the hormone to have this important effect. In other words, they become less sensitive to insulin. This is one of the reasons why being overweight increases the risk of getting type 2 diabetes and cardiovascular disease.

Start your day with this morning ritual and Enjoy Today!

One of the main health benefits of exercise is that it improves our response to insulin. And, in turn, we can better control our blood sugar levels – even if we don’t see this change happening.

It is now becoming clear that when we eat in relation to exercise could be important for this insulin response.

Exercise Cycling. Photo by Mister.

Our study looked at the responses to six weeks of exercise. The workout consisted of supervised cycling for 50 minutes, three times a week. In one group, overweight or obese men exercised before breakfast (fasted state) and showed an improved insulin response after training. This means they subsequently needed to produce less insulin in order to control their blood sugar levels. And this suggests that they had a lower risk of diseases such as type 2 diabetes after the training. But the men who performed the same exercise after eating breakfast did not show an improved blood insulin response.

The men who exercised before breakfast also burned about double the amount of fat during exercise than the group who exercised after breakfast. Current evidence suggests that this increased fat burning during exercise may explain why that group showed improved health benefits.

But don’t expect to lose more weight

A common misconception about exercising while fasting is that the increased fat burning will lead to increased weight loss.

But for weight loss, the important factor is energy balance.

This balance is: the amount of energy eaten as food and drinks, minus the amount of energy that is expended by the body, partly through exercise.

There is some evidence that, over a short period (24 hours), skipping breakfast altogether and doing exercise may create a more negative energy balance. (When compared with eating breakfast and doing the same exercise.) Yet evidence also suggests that when one changes only the timing of meals (in relation to exercise – and not skipping breakfast), the weight lost will be similar even if fat burning is different. So increased fat burning during exercise does not lead to greater weight loss, unless the energy balance (for example, energy intake or energy expenditure) is different.

Hit your exercise goals with this Full Body Workout

Man and Woman getting ready to run. Photo by Andrea Piacquadio.

It is now important to repeat the study in women, although it is likely that the same effect would be shown with exercise before breakfast versus after. This is because for men and women eating breakfast before exercise reduces fat burning during the exercise. This research was also for moderate-intensity endurance exercise, such as cycling and jogging, and the results don’t necessarily apply for high-intensity exercise or weight lifting.

Finding ways to increase the health benefits from exercise may help to reduce the increasing prevalence of diseases such as type 2 diabetes. The new research suggests that for your health it could be better to move your feet before you eat.

Rob Edinburgh

PhD Candidate, Health, University of Bath

This article is republished from The Conversation under a Creative Commons license.

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