FODMAP Diet can Help Runners Beat Stomach Issues

Low FODMAP (fermentable oligosaccharide, disaccharide, monosaccharide, and polyol) diet reduces gastrointestinal symptoms in irritable bowel syndrome sufferers.

New study finds that a low FODMAP (fermentable oligosaccharide, disaccharide, monosaccharide, and polyol) diet decreases some of the issues caused by exercise, like stomach cramps and bloating, and improves a person's perceived ability to exercise. The findings of the study are published in the Journal of the International Society of Sports Nutrition.

Research indicates that cutting out specific foods can alleviate the gastrointestinal issues some people experience when they exercise, with over two-thirds of people involved in a new study reporting an improvement.

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‘Exercise-related gastrointestinal issues are a common cause of underperformance in athletes. But a new study finds that a low FODMAP diet can reduce exercise-related gastrointestinal symptoms and improve the perceived ability to exercise in healthy, recreational runners.’
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Runners, in particular, can be susceptible to symptoms which are similar to irritable bowel syndrome (IBS). Previous research has shown that a low fermentable oligosaccharide, disaccharide, monosaccharide, and polyol (or FODMAP) diet can help people with IBS.

The research involved a group of healthy recreational exercisers. Everyone in the group followed two eating plans in a cross-over design for one week at a time, with the key difference being the FODMAP content.

FODMAP foods included those containing lactose (milk, and cheese), fructans (found in cereals, and pasta), galactic-oligosaccharides (legumes and onions) excess fructose (for example apples, pears, and asparagus) and polyols (often added as a food additive).

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The group completed surveys at the beginning and end of each eating plan to rate the gastrointestinal issues they experienced, and report on how they felt each diet affected their ability to exercise.

The research found that 69% of those following a low FODMAP diet experienced an improvement in symptoms and said they were able to exercise more frequently and at a higher intensity.

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Co-author Dr. Justin Roberts, Principal Lecturer in Sport & Exercise Sciences at Anglia Ruskin University, said: "We found a clear benefit when following the low FODMAP diet, with a reduction in exercise-related gastrointestinal symptoms amongst otherwise healthy, recreational runners.

"The reported improvement in perceived pain, in conjunction with reduced experiences of bloating while on a low FODMAP diet, is likely explained by a reduction in intestinal water volume and gas production, caused by fewer indigestible carbohydrates available for fermentation in the gut.

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"Further studies are needed to examine the benefits of this diet when combined with long-term training strategies, and there are also practical issues to consider if recreational runners try to follow this diet on a daily basis.

"Elite athletes work closely with dieticians and nutritionists, but recreational runners might find following a restrictive diet such as this quite challenging or even stressful. It's also important that people take care if deciding to follow a low FODMAP diet, as reductions in total caloric and carbohydrate intake may impact on nutritional quality."

Source-Eurekalert