Why running makes you (more often than not) literally run for the toilet.
How best to work with runners trots.


The colon-call-card for a sudden desperation sprint to the bathroom when exercising has been coined the ‘runners trots’.
Nothing will destroy your race time more than a prodding stomach pain urging you to find the loo and QUICK – let alone the laborious waiting in those seemingly endless queues for the porta-potty.
So instead of pooping your pants with excitement for the race, how about, we learn what is going on to cause this colon-calling-card. How to deal and finish your race strong, and more importantly, how to prevent it from destroying your timings for the next race. Oh, the joys of runners trots eh?
“It happens to different people for different reasons, but most common sense is that it’s because you’re moving and that up and down motion seems to stimulate the colon a bit,” Lisa Ganjhu (Gastroenterologist NYU Langone Medical Center). When you start to move, there is an adrenaline surge — your heart rate increases, breathing increases and so does your colon. Stimulating the feeling of needing to go 0.3 seconds ago. Thanks to the adrenaline eruption, the stool moves ever-so-quickly through the bowel – there’s less time for water to be reabsorbed, resulting in a watery rather explosive case on your hands. Probably more familiar with pre-race nerves; butterflies in the stomach feeling, and a nervous poop before the start line. – Thank you adrenaline. (I think?)
Okay, it’s no secret running has a strong oscillatory component. Each stride has you land on one foot only to be sprung off into the air for the next landing – a fair amount of jiggling for the insides. Which would no doubt irritate (I mean wouldn’t you be irritated if someone kept juggling you around?) and makes the bowel uber keen to expel its contents if you will.
Running also prompts your body to shunt blood away from the bowels/GI tract (Gastrointestinal) and towards the muscles working hardest, it is more important for the body that the blood and oxygen go to the muscles. Although good for running, the blood shunting can cause GI distress and stomach cramps – not ideal.
In a study of ultra marathoners, 96% experienced gastrointestinal symptoms while running. Meaning, it happens to everyone, whether you’re training for your first race, lacing up for treadmill speedwork, or hitting the pavement outdoors.
One of the biggest runners problems, especially as many races start early morning. What did you have for breakfast pre-run OR early gels as fuel perhaps?
The longer races(marathons and ultra-marathons) look to start at the crack of dawn – even before the sun rises in some cases! so your choice of breakfast can make or break your race. It is well-known that food causing GI distress are high-fibre or coniferous:
And should be avoided to prevent food from running through your system as quickly (about the only time you want things to run slow huh?). A fibre-rich diet is great for healthy digestion for day-to-day but conversely, can cause cramping or diarrhoea on race day.
Surprised to see caffeine on the no-no list? Although it can lead to improved performance, the compounds found in caffeine can impact your gut, by actually speeding up how fast it works. Give yourself at least 60 minutes after a coffee to head out on a run, for the longer distances that is. Many energy gels, chews and drinks contain caffeine so make sure your experiment before race day. See what works best for you and which taste the best because some are questionable. (To whoever invented grape flavour… have you tasted grapes before?!)