Timing, Side Effects, and More

It’s often recommended to eat before exercising to top off your energy stores.

However, some people may experience side effects when eating too close to exercising.

These can usually be avoided by allowing sufficient time for digestion, though this time period varies by the type of exercise.

This article explores how long you should wait to exercise after eating.

When consuming a meal, food enters your stomach and is slowly processed and released into your small intestine in small amounts.

It generally takes 2–4 hours for food to completely move from your stomach to your small intestine (1).

While it’s usually unnecessary to wait until food is fully digested before exercising, it’s best to give it some time to settle in your stomach.

For most people, 1–2 hours is sufficient after a moderate-sized meal, while waiting at least 30 minutes after a snack is fine.

At that point, food has digested enough to avoid stomach upset. That said, as the intensity of the exercise increases, so does the risk of side effects.

summary

While it generally takes 2–4 hours to fully digest a meal, waiting 1–2 hours after a moderate-sized meal and 30 minutes after having a snack should be sufficient before exercising to avoid side effects.

When it comes to eating before exercise, meal size and composition play a significant role.

The larger the meal you eat, the longer it will take to digest, increasing the amount of time you should wait before exercising.

In addition, the composition of the meal affects digestion time.

Meals that are higher in fat, protein, and fiber tend to be digested slower than those containing a larger proportion of simple carbs and more processed proteins, such as those found in some protein shakes and supplements.

High protein foods include intact animal proteins such as beef, pork, chicken, and fish.

Thus, it’s best to avoid eating large meals that are high in fat, protein, and fiber shortly before exercising to avoid any potential negative side effects.

Summary

Meal size and food composition affect the rate of digestion, so it’s best to avoid large meals that are high in fat, protein, and fiber shortly before exercising.

While the side effects that may result from eating close to a workout are highly individual, the most common ones are digestive symptoms and performance issues.

May cause digestive symptoms

Eating too close to working out may cause some digestive discomforts. The most common ones include (2, 3):

• bloating
• nausea
• cramping
• reflux
• vomiting
• diarrhea
• sluggishness

Data suggests that endurance athletes like runners and cyclists are at the highest risk of experiencing these side effects due to the nature of their sport (2).

Lower intensity sports such as golf, walking, and archery are much less likely to trigger digestive symptoms.

Furthermore, most of these side effects can be avoided by allowing some time for digestion before training.

Usually, 1–2 hours is sufficient after a moderate-sized meal, while waiting at least 30 minutes after a snack is fine.

May affect your performance

While fueling up for an intense training session is important, eating too close to a workout may harm your performance.

Athletes and recreational gym-goers often experience a feeling of sluggishness when exercising right after a meal.

A small study in 10 male basketball players found that several of them experienced nausea, belching, and stomach bloating when a protein and carb meal was consumed before training, compared with eating a high carb meal without protein (4).

These symptoms may hinder performance when participating in your sport or exercise of choice.

Summary

Some people may experience various side effects when exercising shortly after eating. These include bloating, nausea, cramping, reflux, vomiting, diarrhea, sluggishness, and potentially hindered performance.

The amount of time required to avoid digestive side effects varies by individual and the sport.

While data on the specific amount of time you should wait is limited, here are some general recommendations:

Some endurance sports, such as running, cycling, and cross-country skiing, lasting over an hour may require eating while exercising to maintain energy stores.

In this case, it’s best to stick to fast-digesting carbs like energy gels or chews to prevent any digestive side effects.

You may find that you can comfortably train shortly after eating, or on the contrary, you may require waiting several hours to avoid side effects.

Therefore, you should experiment to determine your ideal digestion period before exercising.

Summary

The length of time you should wait before exercising varies by sport and individual. Thus, you may have to experiment to find your ideal digestion period. Commonly, it ranges from 30 minutes to 3 hours.

To optimize your energy stores, it’s generally recommended to eat something before exercising.

That said, some may experience negative side effects when eating too close to a workout.

For most people, waiting 1–2 hours to exercise after a meal and at least 30 minutes after a snack is sufficient to avoid side effects.

Those practicing endurance sports may want to wait longer and need to incorporate fast-digesting carbs during workouts lasting longer than 1 hour.

Lastly, avoiding large meals containing a high proportion of fat, protein, and fiber will further help lower the risk of negative side effects.

Timing, Side Effects, and More

It’s often recommended to eat before exercising to top off your energy stores.

However, some people may experience side effects when eating too close to exercising.

These can usually be avoided by allowing sufficient time for digestion, though this time period varies by the type of exercise.

This article explores how long you should wait to exercise after eating.

When consuming a meal, food enters your stomach and is slowly processed and released into your small intestine in small amounts.

It generally takes 2–4 hours for food to completely move from your stomach to your small intestine (1).

While it’s usually unnecessary to wait until food is fully digested before exercising, it’s best to give it some time to settle in your stomach.

For most people, 1–2 hours is sufficient after a moderate-sized meal, while waiting at least 30 minutes after a snack is fine.

At that point, food has digested enough to avoid stomach upset. That said, as the intensity of the exercise increases, so does the risk of side effects.

summary

While it generally takes 2–4 hours to fully digest a meal, waiting 1–2 hours after a moderate-sized meal and 30 minutes after having a snack should be sufficient before exercising to avoid side effects.

When it comes to eating before exercise, meal size and composition play a significant role.

The larger the meal you eat, the longer it will take to digest, increasing the amount of time you should wait before exercising.

In addition, the composition of the meal affects digestion time.

Meals that are higher in fat, protein, and fiber tend to be digested slower than those containing a larger proportion of simple carbs and more processed proteins, such as those found in some protein shakes and supplements.

High protein foods include intact animal proteins such as beef, pork, chicken, and fish.

Thus, it’s best to avoid eating large meals that are high in fat, protein, and fiber shortly before exercising to avoid any potential negative side effects.

Summary

Meal size and food composition affect the rate of digestion, so it’s best to avoid large meals that are high in fat, protein, and fiber shortly before exercising.

While the side effects that may result from eating close to a workout are highly individual, the most common ones are digestive symptoms and performance issues.

May cause digestive symptoms

Eating too close to working out may cause some digestive discomforts. The most common ones include (2, 3):

• bloating
• nausea
• cramping
• reflux
• vomiting
• diarrhea
• sluggishness

Data suggests that endurance athletes like runners and cyclists are at the highest risk of experiencing these side effects due to the nature of their sport (2).

Lower intensity sports such as golf, walking, and archery are much less likely to trigger digestive symptoms.

Furthermore, most of these side effects can be avoided by allowing some time for digestion before training.

Usually, 1–2 hours is sufficient after a moderate-sized meal, while waiting at least 30 minutes after a snack is fine.

May affect your performance

While fueling up for an intense training session is important, eating too close to a workout may harm your performance.

Athletes and recreational gym-goers often experience a feeling of sluggishness when exercising right after a meal.

A small study in 10 male basketball players found that several of them experienced nausea, belching, and stomach bloating when a protein and carb meal was consumed before training, compared with eating a high carb meal without protein (4).

These symptoms may hinder performance when participating in your sport or exercise of choice.

Summary

Some people may experience various side effects when exercising shortly after eating. These include bloating, nausea, cramping, reflux, vomiting, diarrhea, sluggishness, and potentially hindered performance.

The amount of time required to avoid digestive side effects varies by individual and the sport.

While data on the specific amount of time you should wait is limited, here are some general recommendations:

Some endurance sports, such as running, cycling, and cross-country skiing, lasting over an hour may require eating while exercising to maintain energy stores.

In this case, it’s best to stick to fast-digesting carbs like energy gels or chews to prevent any digestive side effects.

You may find that you can comfortably train shortly after eating, or on the contrary, you may require waiting several hours to avoid side effects.

Therefore, you should experiment to determine your ideal digestion period before exercising.

Summary

The length of time you should wait before exercising varies by sport and individual. Thus, you may have to experiment to find your ideal digestion period. Commonly, it ranges from 30 minutes to 3 hours.

To optimize your energy stores, it’s generally recommended to eat something before exercising.

That said, some may experience negative side effects when eating too close to a workout.

For most people, waiting 1–2 hours to exercise after a meal and at least 30 minutes after a snack is sufficient to avoid side effects.

Those practicing endurance sports may want to wait longer and need to incorporate fast-digesting carbs during workouts lasting longer than 1 hour.

Lastly, avoiding large meals containing a high proportion of fat, protein, and fiber will further help lower the risk of negative side effects.

How long to exercise after eating

Exercising on a full stomach can lead to nausea, vomiting and cramps. How long to wait after eating so that playing sports does not bring discomfort? Says the medical author of the section “Health on Sports.ru”, general practitioner Alexander Shestakov.

How is digestion organized?

Digestion is a complex and energy-intensive process. Digestion of food begins already in the oral cavity: due to chewing, mechanical grinding of products occurs, and the saliva enzyme amylase begins to break down carbohydrates already in the mouth.

After swallowing, food enters the stomach, where it is accumulated and digested for several hours: the gastric mucosa secretes hydrochloric acid, which disinfects the swallowed food, and enzymes. Due to the contraction of the walls of the stomach, peristalsis, its contents are mixed.

Gradually, in small portions, the contents of the stomach enter the duodenum, where it mixes with bile and pancreatic juice. On average, after 3-6 hours, depending on the composition of the food, the stomach is completely emptied.

No wonder such a complex process requires a lot of resources. After eating, peristalsis is activated, blood supply to the stomach and intestines increases.

The stomach is stretched, stretch receptors in its wall are activated – this is one of the mechanisms of saturation. In the blood the level of leptin increases and the amount of ghrelin decreases – hormones that regulate appetite and satiety.

The longest time eaten food is in the intestines: in the small intestine – up to 6 hours, in the large intestine – up to several days. The whole process of digestion takes about 3 days.

Drowsiness often occurs after a heavy meal or a “sweet” snack. This is due to the activation of digestion processes and changes in blood glucose levels.

After fast carbohydrates enter the small intestine, blood glucose levels rise, which is felt as a surge of energy. In response, the pancreas secretes a high dose of insulin, a hormone that regulates the metabolism of carbohydrates in the body. After some time, blood glucose quickly returns to normal values.

After consuming a large amount of sweets, there is a jump in blood glucose, to which the pancreas reacts by releasing insulin and quickly returns the indicator to the proper value. Such “sugar swings” cause weakness and drowsiness. To prevent this from happening, the meal should be balanced, without an excess of sweets.

How long after eating can I do sports?

According to the recommendations of the International Society for Sports Nutrition , the time after which you can exercise depends on the amount of food eaten:

• 3-4 hours after a full lunch or dinner,
• 1-2 hours after a light meal without hard-to-digest foods such as fatty meats and nuts,
• 30 minutes to an hour after a small snack, such as cottage cheese or a protein bar.

Experts emphasize that these are approximate recommendations and it is important to listen to your body. If you feel heaviness in your stomach, you should postpone the start of the workout.

Power loads

Exercise is often accompanied by an increase in intra-abdominal pressure. This is especially pronounced during the deadlift, leg press, weighted squats, abdominal muscle training.

Performing this type of exercise immediately after eating increases the risk of backflow of stomach contents into the esophagus, this is called gastroesophageal reflux. It is he who leads to heartburn.

After a full meal, it is worth waiting at least 2-3 hours before starting strength training. A light lunch requires an average of 1-2 hours of waiting before exercising .

If you feel hungry, have a small snack 30-60 minutes before your workout. – a small portion of an omelette with vegetables or cottage cheese with bread will do. It is important not to give up carbohydrates – they will help restore muscle glycogen, the supply of which is depleted during training.

Cardio

Aerobic exercise, such as dancing or running, is associated with intense movement and increased intra-abdominal pressure. The active work of the respiratory and cardiovascular systems increases blood flow to the lungs and muscles. The outflow of blood from the gastrointestinal tract, as well as the mechanical effect on the stomach due to movements, can cause nausea, vomiting, and abdominal cramps.

Start cardio training no earlier than 2-3 hours after a full lunch or dinner, and after a light snack, you can train after 1.5-2 hours . As with strength training, you can have a snack 30-60 minutes before the start of classes.

Swimming

According to a well-known stereotype, you can swim no earlier than an hour after eating. This is not entirely true. Swimming is a kind of cardio workout, so if you have had a hearty meal, then you should not go into the water earlier than after 2-3 hours .

After a light snack, such as fruit or low-fat yogurt, the wait can be reduced to 45-60 minutes .

Focus on how you feel and do not start training in the water if you feel discomfort.

Read more

• Breakfasts for weight loss: what to eat at PP
• Beet juice improves endurance and improves performance in cyclic sports – is it true?
• Protein powder or steak? A packet of collagen or a piece of chicken? What is best for the body?
• Fasting days: is there an effect and what are the contraindications?
• More about training, nutrition, sports medicine and sport as an activity in the Health section
• Subscribe to Sports.ru telegram channel about health

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Is it possible to play sports after eating – Slimming with the calculation

No one can give a definite answer. First, each type of training has its own rules. What is suitable for strength training is not suitable for yoga. Secondly, each person is individual and it is necessary to experimentally look for the optimal time. In this article, we will give the basic rules and guidelines on how to plan the last meal before sports activities.

Can I train immediately after eating?

Fitness trainers are unanimous in their opinion that you should not exercise after eating. Any product needs time to digest. A hearty meal, like breakfast, lunch or dinner, takes longer to digest – 2-3 hours. A light protein-carbohydrate snack, like an apple and a protein shake, will be absorbed faster – 45-60 minutes. At different times of the day, foods are digested differently. Faster digestion of food occurs at lunchtime – from 12:00 to 15:00. In the morning and evening, the rate of digestive enzymes is low.

After eating, blood rushes to the stomach, and during sports, the muscles need it. Physical activity after eating places a high strain on the digestive system. During training, you can feel heaviness in the stomach, drowsiness, weakness, nausea, spasms of the digestive tract.

Based on the basic rules for planning meals before sports and your own feelings after eating, you can find the optimal time.

Nutrition rules before strength training

Eat 1.5 hours before weight training at the gym if it is a complete meal of complex carbohydrates and lean protein sources. If the last meal was 3-4 hours ago and there is no time to wait, have a light snack 30-45 minutes before training from fast-digesting foods (calorie). Cottage cheese with berries or an omelette with vegetables and bread will be an excellent option.

After a workout, you don’t have to rush to the fridge or snack on some special foods. Eat your regular scheduled meal 45-60 minutes later.

Nutrition rules before cardio training

You should eat 1. 5-2 hours before cardio training. This applies to all meals. Snacking before cardio is not necessary (calorizator). An exception – if you feel hungry, make a light snack for 150-200 kcal in 30-45 minutes. Choose protein foods – a protein shake, an egg white omelette, a glass of yogurt.

High-intensity cardio is subject to pre-strength nutrition guidelines. The body during HIIT works in an anaerobic mode, and not in an aerobic mode, as with classic cardio on a simulator.

After cardio, you need to eat after 45-60 minutes. At the end of classes, the body continues to burn fat for some time. Eating will stop the process of burning calories.

Nutrition rules before yoga or Pilates

Between meals and yoga, Pilates or dancing, a long period of time is needed – 2 hours after a light snack and 4 hours for a normal meal. Yoga instructors believe that eating less than 2 hours will disrupt the flow of energies, but agree that if you feel physiological hunger and its inherent weakness, then you need to have a light snack.