subject: Exercise After Eating [print this page] Exercise After Eating Exercise After Eating
What should I eat?
Food eaten before exercise should provide carbohydrate. It should also be low in fat and moderate in fibre to make digestion easier and reduce the risk of gastrointestinal discomfort. For most exercise sessions, the emphasis on carbohydrate and fluid for the pre-event meal. However, it is also useful to continue to consider other nutritional goals when choosing a pre-exercise meal. This may mean including foods that include protein, vitamins and minerals.
The following foods are suitable to eat 3-4 hours before exercise:
crumpets with jam or honey + flavoured milk
baked potato + cottage cheese filling + glass of milk
baked beans on toast
breakfast cereal with milk
bread roll with cheese/meat filling + banana
fruit salad with fruit-flavoured yoghurt
pasta or rice with a sauce based on low-fat ingredients (e.g. tomato, vegetables, lean meat)
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The following foods are suitable to eat if there is less than 1 hour before exercise*:
sports drink
carbohydrate gel
cordial
sports bars
jelly lollies
* A small number of people experience an extreme reaction following the intake of carbohydrate in the hour prior to exercise. This topic is covered later in this fact sheet.
When you expend energy by exercising, you need to consume extra energy to fuel the activity. How much you should eat and at what time of day depends on the type and duration of your workout, as well as when you last ate and what was on the menu.
Ideally, how much energy your body uses (how many calories you burn) and how much energy your body takes in (how many calories you eat) should be in balance all day. Keep in mind that your body burns around 100 calories an hour at rest and during sleep, so you don't just need energy for exercise, you need food throughout the day to fuel being alive. If you are highly active, if you eat big meals, or if you go for long periods without eating, you can upset this balance and cause extreme energy highs (surpluses) or lows (deficits.)
When you first wake up, you are likely to be low on energy. It works like this: If, the night before, you ate dinner at 7 p.m. and then nothing else until breakfast at 7 a.m., you would have gone 12 hours without added fuel. Your body may have burned around 1,100 calories during this period. Most of the fuel used would have come from your stored fat and glycogen (carbs).
But you have a limited supply of carbs because they are stored only in small amounts in your liver and muscles. Even though the body has plenty of fat stored, for fat to be "burned", or metabolized, carbs need to be present. Often, the liver's carb stores are nearly depleted by the morning, so many people may wake up in the morning in a state of energy deficit, where there are not enough carbs to provide energy and to help utilize fat.. So they need breakfast to infuse more energy into their body.
If you skip breakfast and do a tough workout, you launch a depleted body into even greater depletion. Say you burn 500 calories during the workout. By the time you eat later that morning, you may have dipped into an energy deficit of 1,600 calories (that is, 1,100 calories burned while you sleep, plus 500 from the workout). Now your body is famished for fuel. However, you may not feel hungry in this state (known as "ketosis") because your body has shifted to starvation mode to preserve its resources. Diminished hunger is one of the side effects. But a lack of stomach rumblings doesn't mean your body doesn't need fuelit does. In fact, at some point it will demand more fuelyou'll likely binge and go into a huge energy surplus to compensate. This ends up being a roller-coaster calorie ride for your body.
