When a large meal is eaten, blood is sent to the intestines to pick up the nutrients from digestion. If vigorous exercise is attempted within a few minutes after a large meal, blood is sent to the working muscles and away from the intestines. This can cause nausea, cramps in the side, and general discomfort. On the other hand, a slow easy walk can be taken after a large meal without disturbing the digestive process.
It is best to have nothing in the stomach and intestines for 2 to 3 hours before high intensity, vigorous exercise. Drinking water is acceptable during this time to prevent dehydration.
In a general sense, it is better to exercise first and eat later. But if you must eat before exercise is attempted, eat carbohydrate foods, such as fruits, vegetables, and grains. These foods are digested faster and more easily than proteins and fats. Carbohydrates will be removed from the intestinal system faster allowing more vigorous exercise to be attempted sooner.
Consult a dietitian for more specific information about the types of foods that can be eaten before exercise.
Article #7518
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