Why Do You Gain Weight After Exercise?

Why Do You Gain Weight After Exercise?
Credit: Freepik. Some people actually experience weight gain after exercising.

Share :


Exercising is one of the most common methods for those looking to lose weight. By maintaining a healthy diet and exercising regularly, it is expected that you can burn more calories, which will help accelerate weight loss.

However, some people actually experience weight gain after exercising. Why is that?

 

Causes Of Weight Gain After Exercise

For those who are on a healthy weight loss program, the most common methods involve exercising and monitoring dietary habits. It can be surprising to see the scale tip upward after being diligent about exercise.

Experiencing weight gain after working out is quite normal. If your goal is to lose weight, don’t be discouraged when you notice an increase on the scale.

As long as you are consistent with your exercise routine and diet, you will achieve your desired weight because this weight gain is typically temporary.

According to Verywell Fit, there are several reasons why your weight may increase, including:

Muscle Mass Gain

After exercising, your muscles will become more developed. The amount of muscle you gain depends on your diet and the types of workouts you do. Generally, any increase in physical activity will lead to greater strength and muscle mass.

If you engage in strength training and consume adequate protein, the increase in muscle mass will be more significant. This muscle gain is one reason for the weight increase after exercising.

It’s important to note that a rise on the scale doesn’t always mean an increase in fat; it could also indicate fat loss accompanied by muscle gain. Since muscle is denser than fat, it takes up less space in the body but weighs more, which may reflect as weight gain.

 

Water Retention

Water retention, or the body holding onto water, is a common reason for weight gain experienced after exercising. This condition can affect not only those who exercise but also individuals in the premenopausal stage due to hormonal factors.

Additionally, the body may retain more water if you consume high-sodium foods, drink plenty of fluids, but don’t produce much urine. Excess water in the body can contribute to weight gain, especially in those who are salt-sensitive (meaning they naturally retain more water after consuming salty foods).

To mitigate this, you can reduce the intake of high-sodium foods in your daily diet, including processed foods.

 

Inflammation After Exercise

The exercise you perform can also lead to temporary weight gain. For example, if you choose strength training, this can damage muscle tissue at a microscopic level. This tissue damage, or small muscle fiber tears, can cause inflammation in the tissues as part of the body’s natural repair process.

However, this tissue damage is not harmful; in fact, after recovery, exercise allows the muscles to grow stronger.

Muscle damage from exercise can lead to fluid retention, meaning the body holds onto water in response to the inflammation, which may cause temporary weight gain post-workout. This inflammation is transient, so there’s no need to worry if your weight increases after exercising. After the recovery period, your muscles will form and become stronger.

 

Should You Be Concerned About Weight Gain After Exercise?

Gaining weight after exercising is normal and should not be a cause for concern. In fact, if your weight gain is due to the reasons mentioned above, it means your training program is effective.

However, if your weight gain is due to excessive calorie intake resulting from hunger after exercising, this contradicts your weight loss goals. It’s advisable to manage your diet with a low-calorie meal plan to achieve weight loss.

 

If you need medical advice or consultation, you can either visit a doctor or make use of the consultation features that are available in the Ai Care application by downloading the Ai Care application from the App Store or Play Store.

 

Want to know tips and tricks for health, first aid, and other home treatments? Check here, yes!

Writer : Ratih AI Care
Editor :
  • dr. Pandu Lesmana
Last Updated : Thursday, 27 March 2025 | 07:44

Waehner, P. (2022). Why You Might Be Gaining Weight After Working Out. Available from: https://www.verywellfit.com/i-just-started-exercising-why-am-i-gaining-weight-1231585

Cleveland Clinic. (2020). I Just Started Exercising — Why Am I Gaining Weight?. Available from: https://health.clevelandclinic.org/just-started-exercising-gaining-weight/#

Hergenrader, J. (2017). I Just Started Working Out—Why Am I Gaining Weight?!. Available from: https://www.womenshealthmag.com/weight-loss/a19956179/why-am-i-gaining-weight/

Plackett, B. (2021). Why do you sometimes gain weight after exercising?. Available from: https://www.livescience.com/why-exercise-weight-gain.html