Eat or not before swimming in Early Morning?

My kids have evening practices and usually eat a mid size meal an hour before-I try to keep the food light,but one is a teenage boy and he puts food away like there is no tomorrow.I always worry that whatever they eat will end up floating in the gutter halfway through practice, but they have never complained of feeling sick or getting stomach cramps. I on the other hand swim in the AM and in the past had to swim 'empty'-only fluids during swimming and then a decent breakfast.I have finaly conditioned myself to keep down coffee and a banana or half a bagel, but even then I have to wait 1 hour or I feel like stuff is sloshing around my stomach. My feeling is, regardless of what science recomends here, if you need something(liquid or solid) to help your body work and your mind to focus then do it-but if it makes you feel sick it will reflect in the quality of your workout.

My kids have evening practices and usually eat a mid size meal an hour before-I try to keep the food light,but one is a teenage boy and he puts food away like there is no tomorrow.I always worry that whatever they eat will end up floating in the gutter halfway through practice, but they have never complained of feeling sick or getting stomach cramps. I on the other hand swim in the AM and in the past had to swim 'empty'-only fluids during swimming and then a decent breakfast.I have finaly conditioned myself to keep down coffee and a banana or half a bagel, but even then I have to wait 1 hour or I feel like stuff is sloshing around my stomach. My feeling is, regardless of what science recomends here, if you need something(liquid or solid) to help your body work and your mind to focus then do it-but if it makes you feel sick it will reflect in the quality of your workout.