Why Do I Get Nauseous After Running

Have you ever experienced feeling nauseous after going for a run? It’s a common issue that many runners face, including myself. Let’s delve into the reasons behind why this happens and what we can do to prevent it.

What Causes Nausea After Running?

Several factors can contribute to feeling nauseous after a run. One of the primary reasons is the redirection of blood flow during exercise. When we run, our muscles require increased blood flow, leading to a decrease in blood flow to the stomach. This decreased blood flow can affect digestion and lead to feelings of nausea.

Dehydration is another common culprit. As we sweat during a run, our body loses fluids and electrolytes. When we become dehydrated, it can result in nausea and even vomiting. Additionally, intense exercise can stimulate the release of stress hormones, which may also contribute to feelings of queasiness.

Personal Strategies and Tips

As someone who has grappled with post-run nausea, I’ve found a few strategies to be helpful in managing and preventing it. Firstly, staying hydrated before, during, and after a run is crucial. I make sure to drink plenty of water throughout the day, especially on days when I plan to go for a run. Additionally, I’ve learned the importance of not eating a large meal right before running. Instead, opting for a light snack at least an hour before my run has helped reduce the likelihood of feeling nauseous.

Another tactic that has worked for me is gradually building up my running intensity. By slowly increasing the intensity of my runs, I’ve given my body time to adapt to the demands of exercise, which has helped lessen post-run nausea.

Seeking Professional Advice

If you consistently experience nausea after running, it’s essential to consult a healthcare professional. Persistent nausea may be a symptom of an underlying medical issue, such as exercise-induced acid reflux or a gastrointestinal problem. A doctor can provide personalized guidance and rule out any serious concerns.


Feeling nauseous after running can undoubtedly put a damper on an otherwise invigorating activity. By understanding the potential causes and implementing preventive measures, we can strive to minimize this unpleasant experience. Personally, by staying mindful of hydration, meal timing, and gradual increases in intensity, I’ve been able to enjoy my runs without the looming discomfort of post-run nausea.