Emma Nutrition

Simplifying the science through cooking and education. When I'm not on Mummy duties…

Controlling appetite through exercise

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Keeping your appetite under control is a key component of weight loss and maintaining a healthy weight over your lifetime. We all have different strategies to help us manage our appetites in order to prevent overeating or making poor decisions about the foods we choose. Managing stress, getting adequate sleep and having a good exercise regimen are all methods we employ to help us keep our appetites regulated. However, recent research has revealed that the type of exercise can make more of a difference than you think.

A recent study out of the University of Western Australia found that high-intensity exercises may suppress appetite briefly afterward. The team conducting the research discovered that overweight, sedentary men (having a body mass index, or BMI, of 25-29.9) consumed almost 200 fewer calories after performing a vigorous exercise routine than after a period of rest.

Previous research that looked at high-intensity exercise and its effects on the body suggest that it correlates with appetite control and alterations in specific hormones that manage your feelings of hunger and your level of fullness. However, this new research that just came out discovered that those hormones are affected in different ways based on the type of workout regimen–continuous versus intermittent, and different intensity levels (moderate-, high- and very-high-intensity exercises).

The Study

The participants of the study went through four 30-minute workouts. One session was a period of rest, to serve as the control. In the other three exercise sessions, the participants worked out on a stationary bike at various levels of intensity. During one session, the men cycled continuously at a moderate level of intensity. The other two sessions involved intermittent exercise at either high-intensity or very-high-intensity where they would alternate between quick bursts of high-speed pedaling followed by longer bouts of cycling at a slower speed.

After exercising (or resting), the men consumed a 267-calorie liquid meal and were also asked to eat oatmeal until they became full. The results: the participants consumed fewer calories following the intermittent high-intensity and intermittent very-high-intensity exercise sessions versus the period of rest. Here is the calorie breakdown of what the men consumed after each session:

After a period of rest: 764 calories consumed
After continuous moderate-intensity exercise: 710 calories consumed
After intermittent high-intensity-exercise: 621 calories consumed
After intermittent very-high-intensity exercise: 594 calories consumed

And the most interesting finding? The men said they ate less the day after they performed the very-high-intensity exercise when compared to the days after their other workout sessions. This suggests that the appetite suppression experienced after the very-high-intensity workouts extends well beyond the hours immediately following the exercise and that it may even reduce your appetite the following day too.

More Research Needed

Even though this study showed impressive results–participants significantly reduced their calorie intake after the high-intensity and very-high-intensity exercises–it doesn’t show one way or the other if this will produce weight loss for the long term. The size of this study was also quite small–only 17 participants. What was unique about this study was that it was the first of its kind to study overweight participants rather than just people with a normal BMI. Scientists say that more studies need to be performed to assess the long-term implications of this type of weight-loss intervention.

Thanks to Kari Hartel. You can email her at: KariHartelRD@gmail.com

Author: EmmaNutrition

Emma Wight-Boycott MSc mBANT is a natural health expert with a passion for simplifying the science. Emma works with post natal mums, weekend runners and those with digestive issues to find the source of their health issues and rediscover their health mojo.

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