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Runner’s gut: why some marathon runners find themselves sprinting to the toilet instead of the finish line

By Dan Baumgardt, Senior Lecturer, School of Physiology, Pharmacology and Neuroscience, University of Bristol

Running a marathon is no small feat. Athletes can expect to cover between 50-60,000 steps, burn over 3,000 calories and expel multiple litres of sweat to keep cool.

Marathons and other long distance events can be associated with several dangers – including dehydration, electrolyte imbalances…

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