Why is my body size going down but not weight?

Author: Dr. Terrell Corkery Sr.  |  Last update: Sunday, July 20, 2025

If you're doing cardio and strength training, you may build lean muscle tissue at the same time you're losing fat. In that case, the scale may not change even though your body composition is changing. It doesn't reflect your health.

Why am I losing size but not weight?

This happens because you lose body fat while gaining muscle. Your weight may stay the same, even as you lose inches, a sign that you're moving in the right direction. Typically a scale shows your weight, but it doesn't break down how much of that weight is muscle, fat, water, bones, or organs.

Why do I look slimmer but weigh the same?

This happens because you lose body fat while gaining muscle. Your weight may stay the same, even as you lose inches, a sign that you're moving in the right direction. Typically a scale shows your weight, but it doesn't break down how much of that weight is muscle, fat, water, bones, or organs.

Why am I not losing weight but clothes fit differently?

If you are building muscle and losing fat, your body composition is changing, but your total weight may not change much. This can result in your clothes feeling tighter, even if the scale weight hasn't changed much. Additionally, factors such as bloating or water retention can also affect how tight your clothes fit.

Why is my body changing but my weight isn't?

You're losing fat and gaining muscle

Exercise changes your body composition. Simply put, fat takes up more space than muscle but doesn't necessarily weigh less. That net positive change shows up in the way your clothes fit. (Oh hello, looser pants.)

Weight Fluctuations | Educational Video | Biolayne

Why am I not losing weight but looking skinnier?

It's possible to gain muscle and reduce body fat without actually seeing a change in your weight. This happens when you lose body fat while gaining muscle. Your weight may stay the same, even as you lose inches, a sign that you're moving in the right direction.

Why do I look skinny but weigh a lot?

If you've recently started dipping your toe (or your triceps) into strength training, that could have something to do with the discrepancy between the scale and the mirror. While it's a myth that muscle weighs more than fat—after all, a pound is a pound—it is denser, which means it takes up less space in the body.

How much weight do you need to lose to go down a size?

The rule of thumb, Fernstrom says, is that losing 8 to 10 pounds translates to going down one size. Still, if you lose "up to 15 pounds, you may be OK in your old size," she says. But putting off buying new clothes until you really need them doesn't work for everyone.

How to break a weight loss plateau?

How can you overcome a weight-loss plateau?
  1. Reassess your habits. Look back at your food and activity records. ...
  2. Cut more calories. Further cut your daily calories, provided this doesn't put you below 1,200 calories. ...
  3. Rev up your workout. ...
  4. Pack more activity into your day.

Is your weight in the morning your true weight?

You should step on the scale first thing in the morning. That's when you'll get your most accurate weight because your body has had the overnight hours to digest and process whatever you ate and drank the day before. And you should try to turn that step into a regular part of your routine.

Why do I look smaller but weigh more?

Muscle is denser than fat, meaning a kilogram of muscle takes up less space in your body than a kilogram of fat. So, even if you gain muscle and your weight on the scale increases slightly, you can appear slimmer and more toned.

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 is my body fat percentage not going down?

The first and most important reason why you are not burning fat is because you are eating too many calories. Plain and simple the only way to lose body fat is to be in a caloric deficit. You need to be expending more calories than you take in. A lot of this has to do with calories that you don't notice.

Can you lose 20 pounds in a month?

In conclusion, losing 20 pounds in a month is indeed a challenging task, but not an impossible one. With a strategic plan that emphasizes a balanced diet, regular physical activity, and the supplemental use of weight loss supplements, you can make significant strides towards your weight loss goals.

Can you lose size but not weight?

1. Muscle gain with fat loss. If you're losing inches but not weight, you may be gaining muscle and losing fat (which is great news!).

Why is the scale not moving but clothes fit better?

If you're exercising regularly and doing a mix of cardio and strength training, it's likely your body composition (ratio of muscle to fat) is changing for the better. “If the scale isn't moving, but your clothes fit better, and you feel stronger, that's a win,” Pelc Graca says.

How long does water weight last?

How Long Does Water Weight Last? The span can vary depending on the cause. Temporary water weight caused by high sodium intake or premenstrual syndrome can last a few days to a week. Permanent water weight caused by underlying health conditions may last longer and require medical treatment.

What BMI is considered skinny?

Diagnosing weight types with BMI

Underweight: Less than 18.5. Optimum range: 18.5 to 24.9. Overweight: 25 to 29.9. Class I obesity: 30 to 34.9.

What is a hormonal belly?

Hormonal belly is when a person gains weight around the abdomen due to hormonal fluctuations. This could be due to changes in thyroid, adrenal, reproductive, or other hormone levels.

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 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.

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