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

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

Identify what you're doing wrong and follow these simple preventive measures to help you avoid these common gut issues during training and competition.

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

Why we know so little (scientifically speaking) about how to eat for ultramarathons.

Athletes tend to have a more diverse gut microbiome. But does it make a difference in athletic performance?

How visceral sensitivity can be an underappreciated cause of runners’ gut issues.

Modest amounts of artificial sweeteners are unlikely to cause much gut distress, but sugar alcohols can wreak havoc.

A high-fat diet may help reduce stomach distress for some athletes. Here’s how it works and when to consider trying it.

Your gut follows a circadian rhythm just like the rest of your body. Learn how improving one can bolster the other.

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

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

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.

Why running causes diarrhea and strategies to avoid mid-run pit stops.