Why do I lose my appetite after an intense workout?

During intense exercise the level of active ghrelin, which stimulates hunger, may decrease, while GLP-1 may increase. At the same time blood flow is redirected from the digestive system to the muscles, and at very high intensity digestion can slow down.

How much protein should I eat after strength training?

You can aim for 20-40 grams of protein in a meal after strength training, depending on body weight and how much you train.

What can I have if I am not hungry after training?

A protein shake with 25-30 grams of protein and a banana is a simple option.

Do I have to eat straight after a workout?

No. You do not need to eat immediately after the workout if you have had a meal with protein beforehand. If you have trained on an empty stomach, or if there are several hours until your next meal, it may be wise to eat something right after training.

Why do some people feel nauseous after hard sessions?

Blood supply to the stomach and intestines is reduced during intense training, and the stomach may take longer to empty its contents into the intestines. This can be particularly noticeable if you have eaten shortly before training, and some therefore experience stomach discomfort or nausea.

Will I automatically eat more when I start training more often?

Not necessarily. Appetite does not always adjust to the increased energy expenditure from day to day, so you can train more without eating significantly more, especially at the beginning. Some increase their food intake, while others continue to eat roughly the same as before.

Why Appetite Changes When You Train | Hardworkout Magazine

Key takeaways

- Intense training can lower the level of active ghrelin, the hormone that stimulates hunger, so appetite drops even though the body has used more energy.

- During hard efforts the sympathetic nervous system redirects blood from the stomach and intestines to the working muscles, which can slow digestion and cause nausea after a session.

- A short, intense interval session can suppress appetite more than a longer, steadier run, even when the run burns more energy.

- After strength training, aim for 20-40 grams of protein in a meal, adjusted to body weight and training volume.

- Appetite does not always follow increased energy expenditure day by day, so people who start training more may not eat noticeably more at first.

Why are you not hungry after a hard session?

Have you noticed that you are not always hungry after an intense workout, even if it has been several hours since you last ate? Or that you become extra hungry later in the day?

Physical activity affects not only how much energy the body uses, but also the signals that regulate hunger and satiety. How hungry you become after exercise depends, among other things, on how hard and how long you train.

Which hormones control hunger and fullness?

Appetite is regulated through signals between the brain and the digestive system. Several hormones influence when we feel hungry and how full we feel after a meal.

Ghrelin is primarily produced in the stomach and stimulates the feeling of hunger. The level typically rises before a meal and falls after we have eaten.

When food reaches the intestines, hormones such as GLP-1 and PYY are released. These contribute to our feeling of fullness by affecting appetite regulation in the brain.

During intense exercise, the level of active ghrelin may decrease. GLP-1 may also increase, while the changes in PYY are less clear-cut.

When the signals that stimulate hunger become weaker, you may feel less hungry even though the body is using more energy.

Why Intense Training Suppresses Appetite

During intense training, the activity in the sympathetic nervous system increases, which among other things controls how blood is distributed between the muscles and the digestive system.

When the muscles need more oxygen, the nervous system ensures that more blood is directed there, while the blood supply to the stomach and intestines is reduced. This occurs partly through increased secretion of adrenaline and noradrenaline.

At very high intensity, digestion can also slow down. The stomach may take longer to empty its contents into the intestines, which can be particularly noticeable if you have eaten shortly before training.

Some therefore experience discomfort in the stomach or nausea after intense sessions.

Does intense training suppress appetite more than easy cardio?

How hard you train affects your appetite, but energy expenditure alone does not determine how hungry you become afterward.

Intense intervals can suppress appetite more than steady-state cardio. Therefore, you may feel less hungry after a short interval session than after a longer run, even if you have burned more energy during the run.

Strength training can also suppress appetite, but the effect is less predictable than with intense cardio.

How hungry you become after strength training varies, among other things, with how demanding the session has been.

How Appetite Changes Over Time

When you start exercising more often, your body uses more energy, but that doesn't necessarily mean you become hungrier right away.

Appetite does not always adjust to the increased energy expenditure from day to day. Therefore, you can train more without eating significantly more than before, especially at the beginning.

Over time, you may become hungrier between meals if your training causes you to use more energy throughout the day. Regular physical activity can also affect how full you feel after a meal.

How much you eat depends, among other things, on whether you are getting enough energy to meet your needs. Some increase their food intake when they start exercising more, while others continue to eat roughly the same as before.

What should you eat after training if you are not hungry?

Even if you are not hungry after training, your body needs protein to maintain and build muscles, while carbohydrates help replenish glycogen stores.

After strength training, you can aim for 20-40 grams of protein in a meal, depending on body weight and how much you train. After long or intense cardio sessions, it is also important to consume enough carbohydrates, especially if you plan to train again the same day.

If you are not very hungry after training, a protein shake with 25-30 grams of protein and a banana can be a simple option.

You do not need to eat immediately after the workout if you have had a meal with protein beforehand. However, if you have trained on an empty stomach, or if there are several hours until your next meal, it may be wise to eat something right after training.

If you train a lot, it is important to get enough food throughout the day, even if you are not always hungry after training. Eating too little over time can weaken recovery and reduce performance.

![Physical activity and effect on appetite](https://hardworkout.no/wp-content/uploads/2026/10/Sunn-maltid-etter-trening.png)

Sources:

Acute Exercise Effects on Appetite and Energy Intake in People Living With Overweight and Obesity: A Systematic Review and Meta-Analysis – [Human Kinetics Journals](https://journals.humankinetics.com/view/journals/ijsnem/35/6/article-p540.xml)

Exercise‐induced appetite suppression: An update on potential mechanisms – [Physiological Reports](https://pmc.ncbi.nlm.nih.gov/articles/PMC11347021/)