Exercise and Digestion

We all know the importance of exercise and movement for overall health and wellbeing, but fewer people realise just how important it is for digestive health.

Regular movement can have a significant impact on gut function, from how efficiently we digest food to how comfortably our bowels move. Read on to explore how exercise supports optimal digestion.

Improves peristalsis and gut motility

Peristalsis refers to the wave-like contractions of smooth muscle throughout the gastrointestinal tract—including the oesophagus, stomach, and intestines. These automatic movements help push food and waste through the digestive system towards elimination.

When peristalsis is not functioning optimally, gut motility can become slow (hypomotility). This may lead to symptoms such as bloating, trapped gas, and constipation.

A sedentary lifestyle can be a contributing factor. Regular exercise helps stimulate natural gut movement and supports more efficient peristalsis. Over time, this can help improve transit of waste through the bowel.

When stool remains in the colon for too long, more water is absorbed, which can result in harder, drier stools that are more difficult to pass. Supporting healthy gut motility through movement can help reduce this.

Reduces stress

Most people are aware that stress can disrupt digestion and worsen existing gut symptoms such as IBS.

Exercise plays an important role in stress regulation. It has been shown to help reduce levels of stress hormones such as cortisol. Elevated cortisol over time can contribute to digestive issues including altered gut permeability (sometimes referred to as “leaky gut”), reduced nutrient absorption, and abdominal discomfort.

Exercise also increases the release of endorphins—often referred to as the body’s “feel-good” chemicals—which support mood and emotional wellbeing. This can further reduce the impact of stress on digestion.

In addition, people often experience improved sleep quality when stress levels are lower, and sleep is another key factor in maintaining healthy digestion.

Supports a healthy gut microbiome

When people think about improving gut health, diet and probiotics are usually the first considerations. However, research suggests that exercise may also play a role in supporting a healthy gut microbiome.

Regular physical activity has been associated with increased microbial diversity, which is an important marker of gut health. A more diverse microbiome supports digestion, immune function, metabolism, and even aspects of brain health.

It is also important to note that some studies suggest these benefits may be reduced or lost when exercise is stopped. This highlights the importance of regular, consistent movement as part of long-term gut health support.

Reduces risk of colon cancer

Australia has one of the highest rates of bowel (colon) cancer in the world, and it is the second leading cause of cancer-related death after lung cancer. Rates of younger-onset bowel cancer are also increasing.

According to the World Cancer Research Fund, there is strong evidence that physical activity helps reduce the risk of colon cancer.

This may be due to several factors, including:

• Reduced body fat and systemic inflammation
• Improved insulin sensitivity
• Faster transit time through the gastrointestinal tract

Improved bowel transit may reduce the amount of time waste sits in the colon, which is thought to play a role in cancer risk.

When too much exercise can affect digestion

While exercise is generally beneficial for gut health, very intense or endurance-based exercise (such as marathons) can sometimes temporarily disrupt digestion—particularly in people who already experience gut sensitivity.

During high-intensity endurance exercise, the body activates the sympathetic nervous system (“fight or flight”) and reduces activity in the parasympathetic nervous system (“rest and digest”). Blood flow is redirected away from the digestive system towards working muscles.

This can temporarily affect gut function and may contribute to:

• Nausea
• Diarrhoea
• Heartburn
• Abdominal discomfort

These effects are usually temporary, but they highlight the importance of choosing the right type and intensity of exercise for your individual body and symptoms.The key takeaway

Movement is one of the most powerful and accessible tools we have for supporting digestion. The most important factor is not intensity, but consistency.

If structured exercise doesn’t appeal to you, even daily brisk walking can have meaningful benefits for gut motility, stress regulation, and overall digestive health.

The goal is simple: move more, sit less, and choose forms of exercise that feel supportive rather than depleting.

If you are experiencing persistent constipation or difficulty with bowel function, a more individualised approach may help.

At Topaz Health, visceral osteopathy offers a gentle, hands-on approach that supports the abdomen, digestive system, and nervous system to improve overall gut function.

You can learn more or book an appointment online.

References

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2. Song BK et al. Colon transit time according to physical activity level in adults. J Neurogastroenterol Motil. 2012.
3. Lee SP et al. Emotional stress and digestive diseases. J Neurogastroenterol Motil. 2015.
4. Cherpak CE. Mindful eating and gut-brain function. Integr Med. 2019.
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6. Bycura D et al. Exercise modalities and gut microbiome. Sports (Basel). 2021.
7. Oruç Z, Kaplan MA. Exercise and colorectal cancer prevention. World J Gastrointest Oncol. 2019.
8. Brown JC et al. Exercise effects on insulin in colon cancer survivors. Endocr Relat Cancer. 2018.
9. Clauss M et al. Exercise and gut microbiome interactions. Front Nutr. 2021.
10. Arshad Malik MD. Science-backed benefits of exercise on digestion.