We already know that food affects our gut health and what we eat impacts the mix of bacteria and other microorganisms living in our digestive system.

But there's also evidence that exercise plays a large part too.

Researchers are still working out exactly how exercise affects the gut microbiome, but studies suggest that regular movement can influence the types of bacteria living in the gut and how active they are.

What's the gut microbiome?

The gut microbiome is the collection of bacteria, fungi, viruses and other microorganisms living in our digestive system. It helps the body break down our food and produce useful substances for us to live. They also interact with the immune system, metabolism and the lining of the gut.

There's no single version of a "perfect" microbiome. Everyone’s microbiome is different. It changes throughout life and can be affected by how we're born, diet throughout our lives, medication, stress, sleep, age and activity levels.

What does the research say?

A 2024 review of research involving adults found that exercise was linked with changes in the gut microbiome, including an increase in one measure of microbial diversity.

The results were not identical - age, sex, fitness level and the type of exercise all appeared to influence the response.

A 2025 review looking specifically at people who were overweight and it also found that exercise changed the overall structure of the gut microbiome.

Taken together, the studies suggest that movement has an effect, although researchers cannot yet say that one particular exercise will produce the same gut changes in everyone.

Exercise and short-chain fatty acids

Some of the most interesting research focuses on short-chain fatty acids (SCFAs).

These are produced when certain gut bacteria ferment fibre. Butyrate is one of the best known. It provides energy for cells in the colon and helps support the gut lining.

Physically active people often have higher levels of bacteria involved in producing SCFAs. Exercise has this effect inside the body, even when nothing obvious changes on the scales. You don't need to train like a professional athlete to see an effect.

Does the type of exercise matter?

Most of the research so far has focused on aerobic exercise, including walking, running, cycling and swimming. There's not enough high-quality human studies to say that one form of exercise is best for gut health.

So logically, a realistic routine is probably more useful than a supposedly "perfect" one.

That might include:

• Walking after mealtimes 
• Cycling or Swimming
• Yoga, Pilates or Stretching 
• Dancing or Strength training
• A mixture of different activities - even running around after your kids

The main thing is finding something you can keep doing.

Consistency matters

One study asked inactive adults to complete six weeks of supervised aerobic exercise without making changes to their normal diets. The researchers found changes in the participants’ gut bacteria and in the production of short-chain fatty acids.

The participants then stopped exercising. Six weeks later, many of the changes had started to return to their original levels.

This suggests that exercise may need to be regular for the effects to continue.

Can movement help with bloating and bowel habits?

Exercise supports digestion in other ways too.

Movement stimulates the muscles that help move food and waste through the digestive system. Gentle activity may help with trapped gas and support more regular bowel movements.

It can also help with stress. This matters because the gut and brain communicate constantly, and stress can affect digestive symptoms.

A walk after eating may feel more comfortable than a hard workout, particularly if you already feel bloated or unsettled.

One small study involving 94 people found that walking for 10 to 15 minutes after a meal improved feelings of bloating. You can find more practical tips in our guide to five ways to beat the bloat.

Can too much exercise upset the gut?

It can. Runners often know this problem only too well(!!) Long or intense exercise can reduce blood flow to the digestive system, especially in hot weather. This may contribute to cramps, nausea, urgency or diarrhoea.

Research shows that regular physical activity supports digestive health, while prolonged, high-intensity exercise can place extra strain on the gut lining.

Hydration, recovery and sensible fuelling all matter, particularly during longer workouts. More exercise is not always better. Your body still needs time to recover.

How to start without upsetting your gut

Start with a level of movement that feels achievable. Ten or fifteen minutes is enough to begin with. You could add a short walk after lunch or dinner and build from there.

It may also help to:

• Avoid hard exercise immediately after a large meal
• Drink enough water
• Increase intensity gradually
• Notice whether certain foods trigger symptoms before exercise
• Rest between harder sessions
• Choose activities that feel comfortable for your body

If running regularly causes urgency or stomach pain, try something lower impact. Walking, swimming or gentle cycling may be better suited to you.

Movement is only one part of looking after your gut

Exercise can be useful, but it works best as part of a wider routine.

Eating a varied diet, getting enough fibre and fluid, managing stress and sleeping well can all influence how your digestive system feels and functions.

Some people also choose to include a daily digestive supplement. Gut Wealth is designed to sit alongside healthy lifestyle habits, with ingredients chosen to support the gut microbiome, bowel regularity and everyday digestive comfort.

The Gut Wealth Liquid Sachets contain a blend of postbiotic, probiotic and prebiotic ingredients and are designed to support gut balance, bowel regularity and stool consistency. The sachets are easy to take at home or on the go.

For anyone who prefers a simple one-a-day option, the Gut Wealth Daily Capsules are designed to provide similar everyday support for bloating, irregularity and digestive discomfort.

Supplements are not a replacement for a balanced diet or a healthy lifestyle. Think of them as one part of a consistent gut-health routine, alongside movement, food, hydration, sleep and stress management.

The Gut Wealth view

Exercise can change the gut microbiome. Research suggests that regular physical activity may influence microbial diversity, the balance of gut bacteria and the production of short-chain fatty acids.

There is still plenty we do not know. Diet, sleep, stress, medication and individual biology all affect how the microbiome responds.

The most useful advice is simple. Move regularly, choose an activity you enjoy and avoid pushing your body beyond what feels manageable.

You don't need to become an athlete. A little more movement, done consistently, is enough to make a difference.

Continue reading

5 Proven Ways to Beat Bloating Fast

Spring Gut Health Reset: Refresh Your Digestion This Season

Gut Health and Mental Health: The Surprising Connection

Sources

Min L, et al. Effects of Exercise on Gut Microbiota of Adults: A Systematic Review and Meta-Analysis. Nutrients. 2024.

Varghese S, et al. Physical Exercise and the Gut Microbiome: A Bidirectional Relationship. Nutrients. 2024.

Cullen JMA, et al. A Systematic Review on the Effects of Exercise on Gut Microbial Diversity, Taxonomic Composition and Microbial Metabolites. Frontiers in Physiology. 2023.

Kim YI, et al. Effect of Exercise on the Human Gut Microbiota in Overweight and Obesity: A Systematic Review and Meta-Analysis. 2025.

Hawley JA, et al. Exercise, the Gut Microbiome and Gastrointestinal Diseases. Gastroenterology. 2025.

This article is for general information and education only. It is not a substitute for medical advice, diagnosis or treatment. Speak to a qualified healthcare professional if you are concerned about ongoing or changing digestive symptoms.