Exercise-induced nausea is a feeling of sickness or vomiting which can occur shortly after exercise has stopped as well as during exercise itself. It may be a symptom of either over-exertion during exercise, or from too abruptly ending an exercise session. Lack of hydration during exercise is a well known cause of headache and nausea.Exercising at a heavy rate causes blood flow to be taken away from the stomach, causing nausea.
Another possible cause of exercise induced nausea is overhydration. Drinking too much water before, during, or after extreme exercise can cause nausea, diarrhea, confusion, and muscle tremors.
Next Steps
try to not exert yourself too much during workout, stay hydrated throughout the day in general, avoid drinking too much water immediately before or during any workout.