Why am I gaining weight if I'm eating less and working out?

Author: Miss Maureen Hammes  |  Last update: Thursday, July 24, 2025

Increased muscle mass So even though you may be losing fat, you're gaining muscle. You might feel slimmer, even as the number on the scale rises. “The scale doesn't tell the entire story,” said exercise physiologist Christopher Mohr, PhD, RD.

Why am I getting fatter while dieting and exercising?

Muscle gain: When you take part in customary activity, particularly opposition or strength preparing, your body might fabricate slender bulk. Muscle weighs more than fat, so regardless of whether you're losing fat, the expansion in bulk can prompt weight gain.

Why am I gaining weight when working out and eating less?

The No. 1 reason you might gain weight while working out and eating healthier is because you're gaining muscle mass. And that's a good thing! A pound of muscle and a pound of fat will weigh the same, but look different.

Why am I gaining weight in a calorie deficit and working out?

Yes, strength training can cause an increase in weight even if you are in a calorie deficit. This is because muscle is more dense than fat and so it takes up more space.

Why am I not losing weight when I exercise and eat less?

If you are eating well and going to the gym but aren't seeing a shift in the scale, it may be because you are gaining muscle, which is more dense than fat. This means you could weigh the same, even if your body composition has changed.

"Why am i gaining weight when i'm eating less and working out?" - simple answer 🚨

Why am I gaining weight if I barely eat?

If you're asking yourself, “Why am I gaining weight when I barely eat,” several factors may be at play. Your body may be holding onto fat stores if your eating habits are inconsistent or restricted. Or, your weight gain may be the effect of a sedentary lifestyle, medical condition, or long-term stress.

How to flush out water weight?

  1. Exercise Regularly. Daily exercise provides several health benefits, including preventing water retention. ...
  2. Drink More Water. Drinking water to reduce water weight sounds counterintuitive, but it helps. ...
  3. Manage Salt Intake. ...
  4. Cut Carbs. ...
  5. Focus on Certain Foods and Herbs. ...
  6. Try Supplements. ...
  7. Up Your Caffeine Intake.

Why have I gained 10 pounds since working out?

Muscle is denser (meaning a lot less fluffy) than fat, says Dr. Calabrese. Put another way, 10 pounds of muscle takes up a lot less space than 10 pounds of fat. So, as you start working out regularly and building strength, the new muscle you build may eventually weigh more than the fat you've burnt off.

How long does water retention last?

Water retention may clear without treatment in a few days. However, if there is a health problem causing you to hold onto fluid, your swelling may worsen over time. You may find that the body parts retaining water become tight, swollen, and painful. If untreated, heart or kidney problems may get much worse.

How to reset metabolism?

Here are some of the best ways to get your metabolism back on track.
  1. Optimize your thyroid function. ...
  2. Eat a healthy, nutrient-dense, gut-friendly diet. ...
  3. Increase your protein intake. ...
  4. Increase your fiber intake. ...
  5. Eat the majority of your food earlier in the day. ...
  6. Stay well hydrated. ...
  7. Drink coffee and tea.

What is the 30/30/30 rule for weight loss?

The 30/30/30 is a weight loss method that involves eating 30 g of protein within the first 30 minutes of your day and following it with 30 minutes of light exercise. This morning routine is rooted in sound science, and it could be a good way to increase your capacity to burn fat while keeping lean muscle.

Why is my body not letting me lose weight?

Muscle helps keep up the rate at which you burn calories (metabolism). So as you lose weight, your metabolism declines, causing you to burn fewer calories than you did at your heavier weight. Your slower metabolism will slow your weight loss, even if you eat the same number of calories that helped you lose weight.

What illnesses make you put on weight?

Medical reasons

In some cases, underlying medical conditions may contribute to weight gain. These include: an underactive thyroid gland (hypothyroidism) – where your thyroid gland does not produce enough hormones. Cushing's syndrome – a rare disorder that causes the over-production of steroid hormones.

Why do I look fatter after working out for 3 months?

Gaining weight after working out is likely due to muscle fiber inflammation, muscle glycogen and water weight gain, and over time, muscle mass gain. If weight loss is your goal, seeing an increase on the scale when you've been making an effort to exercise can be frustrating.

Do you gain weight first before losing?

“When someone begins exercising for the first time or significantly increases their exercise intensity, the body will undergo multiple initial adaptive responses that may lead to initial weight gain, rather than weight loss,” says Christopher McGowan, MD, a gastroenterologist and weight loss expert in Cary, North ...

How long does it take to start losing weight when exercising?

Stage 1: Fast weight loss

In the beginning, weight loss happens pretty rapidly. Over a period of 4-6 weeks, you'll likely see a noticeable difference in your body weight [1] — either on the scales or by the way your clothes fit.

How to lose 4 pounds of water weight overnight?

4 ways to lose water weight immediately
  1. Drink more water. It might be a little difficult to believe but drinking more water can actually help you shed water weight. ...
  2. Reduce intake of salt. Too much salt or sodium in your diet may be contributing to water retention. ...
  3. Consume fewer carbs. ...
  4. Exercise.

How long does it take to lose 20 pounds?

To lose weight effectively and safely, aiming to lose 1 to 2 pounds (lbs) per week may be best. This means that losing 20 lbs may take 10 to 20 weeks. To lose weight, people will likely need to follow a healthy diet and get regular exercise. Some popular diets are effective initially but challenging to maintain.

Why am I gaining weight while eating healthy and exercising?

Working out can cause short-term weight gain as your muscle mass increases. Post-workout inflammation may cause temporary weight fluctuations. Workout plateaus, supplement use, and dietary changes can also stall your weight-loss efforts. Try not to obsess over the number on the scale.

How long does it take to see results from working out as a female?

For beginners, you can expect to see initial changes in strength and endurance within 4-8 weeks of consistent participation in fitness classes. These initial gains can be highly motivating, improving your physical strength and cardiovascular endurance and providing a solid foundation for future progress.

Will I gain weight if I sleep after exercise in the morning?

If you're wondering about weight gain from sleeping post-exercise, rest assured that sleep is a crucial part of recovery and does not directly lead to weight gain. Getting adequate sleep is essential to a healthy lifestyle and can contribute to overall well-being, including weight management.

What kills water weight?

Water weight is not usually a cause for concern, but it can be uncomfortable and recurring. Reducing salt and carbohydrate intake, keeping hydrated, and frequently exercising are all good ways to lose water weight and prevent it from returning.

How to lose belly fat fast?

8 Ways to Lose Belly Fat and Live a Healthier Life
  1. Try curbing carbs instead of fats. ...
  2. Think eating plan, not diet. ...
  3. Keep moving. ...
  4. Lift weights. ...
  5. Become a label reader. ...
  6. Move away from processed foods. ...
  7. Focus on the way your clothes fit more than reading a scale. ...
  8. Hang out with health-focused friends.

Why is my body holding onto fat?

1. Your Metabolism Will Slow Down to Store Fat. The more you work out or manage your calorie intake to lose weight, the more your metabolism wants to compensate by slowing down to maintain your current weight, this is called metabolic compensation. It kicks in to preserve and store fat for future energy.

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