During the water sports can not be too hungry, not too full, it is recommended that an hour after eating before going into the water sports, when the physical strength is better, and will not affect the gastrointestinal health. An hour after the meal is the best time to get into the water sports, at this time the food in the gastrointestinal has been digested, nutrients have been absorbed by the body, the physical strength is more adequate, in the time of underwater sports do not have to worry about hypoglycemia caused by physical incompetence. In addition, the water sports at this time to promote digestion has a certain degree of help, and will not lead to gastrointestinal discomfort. It should be noted that before entering the water to test the water temperature, the water temperature is too low for underwater exercise. In addition, the body in a state of extreme hunger is not suitable for water sports, when the lack of physical strength, water sports are prone to physical incompetence, while the meal before the water sports, it is recommended to properly supplement carbohydrates to ensure nutrition.