The Time to Do Sit-Ups After Eating

While exercising daily lets you stay fit and healthy, you may regret being overly eager to work out right after a meal. This is especially true if you decide to do abdominal exercises because the strain and crunching can cause you to experience cramping and possibly lose your last meal. The amount of time you should wait to do sit-ups after eating depends on what you ate, how much you ate and any digestive issues you may have.

  1. How Digestion Works

    • Your food begins digesting the moment it hits your mouth. Your teeth start breaking down food in to small, easy-to-digest pieces as you chew. The enzyme amylase in your saliva creates a chemical reaction with starches from your food to speed up the digestion process. Once your food hits your stomach, other enzymes work to completely break it down so the nutrients can be readily absorbed by your body. The total process from mouth to elimination can take up to 48 hours, according to MayoClinic.com. Blood flows to your stomach after you eat to aid with digestion. Doing ab exercises too soon after you eat can give you stomach cramps as blood has to leave your stomach and go to your muscles.

    Food Types

    • In general, you should wait at least an hour after eating to work out. However, different types of foods digest at different rates, so the time you need to wait to do ab exercises after eating depends, in part, on what you ate prior to the workout. Carbohydrates digest the fastest, followed by protein and then fat, which takes the longest to digest. Simple carbs like fruit, when eaten about 45 minutes to an hour before you exercise, break down easily and can give you quick energy for your workout. Fatty foods, on the other hand, should not be eaten immediately before an ab workout because they don't provide fast energy and can leave you feeling sick if not given at least a couple of hours to digest.

    Meal Size

    • The size of the meal you eat before your ab workout will also have an impact on how long you should wait to exercise. Larger meals take longer to digest, so you need to wait longer to work out if you ate a big meal. MayoClinic.com recommends waiting three to four hours before exercising after eating large meals, two to three hours before exercising after eating a small meal and about an hour to workout if you've eaten a small snack like fruit, granola or a protein bar.

    Considerations

    • Every person's body responds differently to the foods they eat and the exercises they do. Therefore, it is important to know your body when deciding how soon after a meal to work out. Some people need to exercise on an empty stomach to avoid nausea or cramps, while others need to eat shortly before a workout to avoid a drop in blood sugar. Gastrointestinal problems, such as acid reflux and heartburn can also impact your ability to do sit-ups after eating if you have these issues. If you do choose to do sit-ups within a couple hours of eating, take it slowly and monitor your body. If you become nauseous or get abdominal cramps, take a break until your food has had more time to digest.