The Unseen Strain: How Endurance Athletes’ Gut Problems Reveal a Larger Issue

The recent public mishap involving Australian athlete Joanna Wietrzyk at the Hyrox games in Beijing has shed light on a common affliction among endurance athletes: runner’s trots. This issue is not just about athletes being caught with their pants down, but also highlights the strain extreme exercise puts on the human body.

Wietrzyk’s case, while cringe-worthy, is far from isolated. Studies have shown that up to 90% of endurance athletes experience gastrointestinal symptoms during training or competition, ranging from mild bloating and cramping to nausea, diarrhea, and even loss of bowel control. The severity varies, but the prevalence is alarming.

Exercise affects the digestive tract by diverting blood to skeletal muscles, reducing its motility and absorptive ability. Consuming high amounts of drinks, gels, and bars during exercise can exacerbate this problem. Heat also plays a significant role, as blood is diverted to the skin for cooling and core temperature preservation.

Several factors contribute to runner’s trots, including mechanical jostling of the intestines, dehydration, and intolerance to certain foods or nutrition protocols. Researchers have identified a potential link between gut problems and performance stress – often referred to as the “gut-brain axis”.

Prevention strategies such as avoiding unfamiliar foods before a competitive event, staying well hydrated, managing heat exposure, and gradually adapting the gut to tolerate carbohydrates and fluids during exercise may help mitigate these issues. However, the key takeaway is not just about individualized approaches but also acknowledging the strain extreme exercise puts on the human body.

The scientific literature has recorded gut problems related to exercise stress for over a century – yet it’s still relatively unclear why this occurs. This lack of understanding may be due in part to the assumption that athletes are invincible machines capable of pushing their bodies to extremes without consequence. But the reality is far more nuanced.

Athletes’ gut problems serve as a reminder that even with rigorous training and preparation, our bodies have limits – and ignoring these limits can lead to severe consequences. Researchers advise treating the gut like any other part of the performance system by keeping a record of foods, fluids, symptoms, and environmental conditions to look for patterns.

Ingesting carbohydrates during prolonged exercise may help alleviate symptoms, as well as considering low-fibre and gluten-free diets. Ultimately, Wietrzyk’s public mishap serves as a wake-up call for athletes, coaches, and medical professionals alike. By acknowledging the unseen strain endurance athletes’ gut problems reveal, we can begin to better understand how to mitigate these issues – and ensure that our most extreme feats of human endurance do not come at an unacceptably high cost.