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Big leaguers expand their stomachs to hold more food by chugging gallons of water or milk. They also prep by eating enormous, low-calorie, high-fiber meals — think a tower of iceberg lettuce.
Learn either to take bigger bites or small bites in rapid succession. Tilting your head back means gravity helps the work of peristalsis, in which food naturally squeezes its way down toward your stomach.
Drinking too much water in a short amount of time can make you sick. And crash dieting can permanently alter how you metabolize food.
Basically: Consult with your doctor if you plan to train for competitive eating.