The major source of fuel for active muscles is carbohydrate which gets stored in the muscles as glycogen in the days before exercise. It takes time to completely fill glycogen stores, and what you eat after exercise can help or hinder this process. Eating the right foods at the right time after a workout is essential for recovery and being ready for the next workout.
What you eat before exercise often depends upon your unique needs and preferences, but should be designed according to the intensity, length and type of workout you plan to do.
When to Eat Before Exercise
Exercising on a full stomach is not ideal. Food that remains in your stomach during an event may cause stomach upset, nausea, and cramping. To make sure you have enough energy, yet reduce stomach discomfort, you should allow a meal to fully digest before the start of the event. This generally takes 1 to 4 hours, depending upon what and how much you've eaten. Everyone is a bit different, and you should experiment prior to workouts to determine what works best for you.
If you have an early morning race or workout, it's best to get up early enough to eat your pre-exercise meal. If not, you should try to eat or drink something easily digestible about 20 to 30 minutes before the event. The closer you are to the time of your event, the less you should eat. You can have a liquid meal closer to your event than a solid meal because your stomach digests liquids faster.
What to Eat Before Exercise
Because glucose is the preferred energy source for most exercise, a pre-exercise meal should include foods that are high in carbohydrates and easy to digest. This include foods such as pasta, fruits, breads, energy bars and drinks.
Eating before exercise is something only the athlete can determine based upon experience, but some general guidelines include eating a solid meal 4 hours before exercise, a snack or a high carbohydrate energy drink 2 to 3 hours before exercise, and fluid replacement 1 hour before exercise.
fresh fruit such as apples, watermelon, peaches, grapes, or oranges and/or
Energy gels
up to 1 1/2 cups of a sports drink.
2 to 3 hours before competition
fresh fruits
bread, bagels, pasta
yogurt
water
3 to 4 hours before competition
fresh fruit
bread, bagels
pasta with tomato sauce
baked potatoes
energy bar
cereal with milk
yogurt
toast/bread with a bit of peanut butter, lean meat, or cheese
water
Glucose (Sugar) and Exercise Performance
If you are an endurance athlete, evidence suggests that eating some sugar (glucose) 35 to 40 minutes before an event may provide energy when your other energy stores have dropped to low levels. However, you should experiment with such strategies before competition because some people do not perform well after a blood glucose spike.
Caffeine and Performance
Caffeine acts as a stimulant on the central nervous system. It had been thought to boost endurance by stimulating a greater use of fat for energy, and thereby reserving glycogen in the muscles. Research, however, doesn't seem to support that theory. When caffeine improves endurance, it does so by acting as a stimulant.
Caffeine can have serious side effects for some people. Those who are very sensitive to its effects may experience nausea, muscle tremors, and headaches. Too much caffeine is a diuretic, and can result in dehydration, which decreases performance.
Foods to Avoid Before Exercise
Foods with a lot of fat or fiber can be very difficult and slow to digest and remain in the stomach a long time. They also will pull blood into the stomach to aid in digestion, which can cause cramping and discomfort. Meats, doughnuts, fries, potato chips, and candy bars should be avoided in a pre-exercise meal.
Keep in mind that everyone is a bit different and what works for you may not work for you teammate or training partner. Factor in individual preferences and favorite foods, and an eating plan is a highly individualize thing.
