Before I do any strenuous workout, like running or swimming, I make sure I eat at least 2 hours before that to fuel my body and prepare it for the workout. Some people can manage an hour before the workout, but not me. I'll definitely regurgitate whatever I ate. I learned that while doing the warm up exercises for Tai Chi class some years ago. Good thing I was able to hold the food in or it would have been such a mess, not to mention very embarrassing.
