Diarrhoea While Running

How do I prevent diarrhoea when I'm running?

Answer by Dominique:

Nothing like the runners' trots!
Plenty of runners have this issue at some point, so you are not alone. I once did a 10k race and had to quit because of it.

There are some theories about why it happens, having to do with blood flow or the effect running has on the digestive system. If this is true, then there would be relatively little you can do about it.

However, many runners can try to make some dietary changes to fight off diarrhoea while running:

  • Caffeine

  • Caffeine can be a catalyst, so try to avoid that the hours before exercise.

  • Lactose

  • You could be lactose intolerant. Lactose is also known as milk sugar and can be found in milk and dietary products. So avoid milk, yoghurt etc before your run. You could also get some pills at the pharmacy against lactose intolerancy.

  • Don't eat close to the run

  • Running on a full stomach is pretty much a recipe for disaster.

  • Medicinal help

  • There are over-the-counter medicines that can help. Talk to your chemist.

    Keep a journal of what you eat and when you have these diarrhoea-issues. You may find that there are certain foods that set it off, or a specific time between eating and running.

    Hope this helps.
    Best of luck.

    Join in and write your own page! It's easy to do. How? Simply click here to return to Running Injury Helpline.

    Like this page:

    Share this page:

    Like this site:

    [?] Subscribe To This Site

    follow us in feedly
    Add to My Yahoo!


    • Beginner Running Tips

      Are you a beginning runner? Then this is your best starting point. Many tips and running programs on offer, dedicated to you.

    • Running for Weight Loss

      Aiming to lose a few pounds? Get into the Running for Weight Loss section for tips and advice.

    • Running Training

      The Running Training section of the site has got the most articles. It is constantly getting updated with new tips and information. A must-visit if you are serious about improving your running performance.

    • 5k Running Tips

      The 5k is a great distance to run and train for. The great thing is that you can do it quite often and see big improvements.

    • 10k Running Tips

      The 10k is a real challenge. You need to run fast for an uncomfortably long time! Check out this section if you are strong of mind and legs!

    • Marathon Running Tips

      The marathon is a massive challenge. Proper training is so important! Make sure to check out this section if you have got your mind set on the marathon!

    What's New?

    1. The Most Important Beginner Running Tips - All You Need To Know When You Start Running

      The most important beginner running tips. All you need to know before you put on those running shoes.

      Read more

    2. Marathon Pacing Strategy - Use These Tips and Tricks to Hit That Marathon Pace Goal

      These marathon pacing tips and tricks will help you nail your marathon pace goal.

      Read more

    3. Treadmill Running and a Half Marathon

      Hello, I took up running 6 months ago and only ever run on a treadmill. Most weeks I run 9km 4 times a week and a fast 5km. I want to run a half marathon

      Read more

    4. What is Better? Running Longer Distance or Running More Often?

      I run for 30 minutes every other day with a 15 minute warm-up and a 15 minute cool-down. On the days in between I walk for 60 minutes. I eventually

      Read more

    5. Running and Calf Cramps - Conquering the Calf Cramp Conundrum: Causes, Prevention, and Relief

      The most common issue that we runners will all experience at one point in our lives is calf cramps. They can be a real buzzkill. Check out this page to learn causes and ways to treat and prevent calf…

      Read more