I've trained many a clients who have vomited or felt nausea during a workout session. To prevent feeling queasy during future workouts it is very important to know what causes it.
Causes of Nausea During Working Out:
-Low blood sugar levels due to working out on an empty stomach
-Motion sickness from performing abdominal exercises
How To Prevent Nausea During Working Out:
1. If exercise-induced nausea is caused by working out on an empty stomach, eating a small meal or snack an hour or so before a workout may prevent nausea and vomiting from occurring. Stick with a high-carb, low fat meal. The carbs from the meal provide the body with the energy needed to make it through a workout. A high carb/low-fat meal or snack digests easily as well and a moderate amount of protein will help to stave off hunger through a workout.
2. Oftentimes exercise-induced nausea will occur during high-intensity workouts. Pushing too hard or performing exercise at a pace above one's fitness level are common causes of exercise-induced nausea. If overexertion is the cause, try scaling back a workout or working up to performing high-intensity workouts.
3. Be sure to hydrate the body before and during a workout.
4. Those who like to perform abdominal exercises at the beginning of their workout are prone to motion sickness because of their eyes being closed during the exercises or the eyes scanning the ceiling freely. I suggest locking the eyes on a fixed point on the ceiling during abdominal exercises to prevent exercise-induced nausea. Also, performing abdominal exercises mid-workout or closer to the end of a workout may prevent nausea as well.
Anyone who is experiencing nausea or vomiting during or after a workout should first consult a physician just to ensure there are no underlying medical problems causing their exercise-induced nausea