stomach issues

Gut problems in runners have myriad sources — from stress to heat, caffeine to sleep deprivation — and all of them can sabotage your performance.

A sports scientist explains why our bodies seem to be working against us at times.

From probiotics to ginger, here’s how to assess the supplements that can help you manage gut woes.

The performance benefits of the world’s favorite chemical could be washed out if it causes trouble in your gut.

Your DNA has a say in your caffeine buzz, but it’s still not clear how genes affect gut sensitivity to caffeine.

Loads of factors within and outside the body contribute to nausea during ultramarathons, but there are some ways to mitigate it.

It’s bad enough sweating it out in scorching heat. Then comes stomach pain or irritated bowels.

Why running can make you want to hurl and how to prevent run-related nausea.

If you want to process more carbs in on the run, get your body used to the load.

It's usually a lack of fluids, not the food you eat, that leads to GI problems.

The author learned a valuable lesson: Always bring a spare roll.

One study suggests carbs are not the main culprit.