Why Do I Feel Nauseous After High-Intensity Workouts?

Experiencing post-exercise nausea? Learn why blood diversion during high-intensity workouts can slow digestion.

Why Do I Feel Nauseous After High-Intensity Workouts?
Photo by Christopher Boswell / Unsplash

When you engage in high-intensity workouts, particularly max sprints, and feel nauseous afterward, it’s not just in your head.

The physical sensations of nausea are linked to a series of physiological responses that occur in your body during and after intense physical exertion.

The Role of Blood Diversion

During high-intensity workouts like max sprints, your body prioritizes sending oxygen-rich blood to the working muscles.

This physiological response, known as blood diversion, is crucial for delivering the necessary nutrients and oxygen to the muscles to support the increased demand during intense exercise.

However, this diversion of blood away from the internal organs, including the stomach and digestive system, can lead to a slowdown in digestion.

When food sits in the stomach undigested due to reduced blood flow, it can contribute to feelings of nausea and discomfort.

Expanded Impact Beyond Sprints

While the sensation of nausea after high-intensity workouts is commonly reported after max sprints, it can also occur following other forms of vigorous exercise, such as high-intensity interval training (HIIT) and intense resistance training.

The common thread among these activities is the body's response to intense physical exertion, which triggers the same physiological processes that contribute to post-exercise nausea.

Strategies to Minimize Post-Workout Nausea

To minimize the likelihood of experiencing nausea after high-intensity workouts, it's essential to consider the timing and composition of your pre-workout meal.

Consuming a large or heavy meal close to the workout may exacerbate feelings of nausea due to the added strain on the digestive system during exercise.

Opting for a smaller, easily digestible snack, such as a banana or a smoothie, at least 1-2 hours before a high-intensity workout may help alleviate the discomfort.

Additionally, staying properly hydrated before, during, and after the workout can assist in preventing post-exercise nausea.