However, BMI doesn't distinguish between muscle and fat and, thus, can be skewed, especially because muscle weighs more than fat. So a very muscular person could be categorized as obese when, in fact, they might be very healthy.
BMI score has some limitations because it measures whether a person is carrying too much weight but not too much fat. For example, people who are very muscular, like professional sportspeople, can have a high BMI without much fat.
A: The short answer is yes — it's possible for you to be both fit and overweight, even obese. What's really important to understand is what “fit” means and what “overweight” means relative to your health.
Muscle weighs more than fat, so if you've been hitting the gym and building lean muscle mass, you may weigh more than someone who appears to have a similar body shape but lacks muscle tone.
This could be due to an increase in calorie consumption, lack of exercise, or other lifestyle changes. Muscle mass can also play a role, as it is denser than body fat and will add weight to your body. If your body measurements have stayed the same, it's likely that you have gained body fat and/or muscle.
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.
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.
Lean muscle mass is more compact than fat. If you are muscular you can weigh quite a bit and not look fat. A person can be an ideal weight and have a lot of fat and look bulky. Another person can be overweight and have mostly muscle mass, and look lean and healthy.
This is what might politely be called the chubby category, with body mass indexes (a measure of weight for height) of 25 to 30. A woman, for instance, who is 5 feet 4 inches tall and weighs between 146 and 175 pounds.
Some people may be genetically protected from developing insulin resistance. Others are genetically programmed to store fat in the hips or thighs, which is less metabolically hazardous than storing fat around the abdomen. The concept of metabolically healthy obesity could be used to help guide treatment.
But your weight alone can't tell you whether you're underweight, healthy, or overweight. If you're 6'4" and you weigh 200 pounds, you're probably at a healthy weight; but if you're 5'9" and weigh 200 pounds, you're probably overweight. Curiosity Project: Has agricultural development affected human obesity?
Skinny fat people are often a normal weight (or underweight!) but because of their sedentariness, lack of muscle, or poor diet, they have a high percentage of body fat. Often, skinny fat people are at risk of certain medical issues as listed: Raised blood sugar, leading to insulin resistance or diabetes.
Waist Circumference
If most of your fat is around your waist rather than at your hips, you're at a higher risk for heart disease and type 2 diabetes. This risk goes up with a waist size that is greater than 35 inches for women or greater than 40 inches for men.
There are some genes associated with obesity and overweight. In some people, genes can affect how their bodies change food into energy and store fat. Genes can also affect people's lifestyle choices. There are also some rare genetic conditions that can cause obesity, such as Prader-Willi syndrome.
A few people have high BMIs but don't have much body fat. Their muscle tissue pushes up their weight. Kahan points to very muscular people, like football players or body builders. “Their BMI shows up pretty high, and yet their body fat is actually pretty low," Kahan says.
Normal or healthy weight is indicated by a BMI between 18.5 and 24.9, overweight is between 25 and 29.9, and obese is 30 and above. For the majority of people who are less than 6 feet 4 inches tall, weighing more than 200 lbs would place them in the “overweight” or “obese” category, according to BMI calculations.
The phrase 'skinny fat' or metabolically obese normal weight (MONW) is used to describe someone who appears to be lean, but actually has a high body fat percentage. If they were to calculate their body mass index (BMI) or even weigh themselves, they may appear to be healthy, but this can be deceiving.
Your body composition may be another reason why you are still gaining weight while in a calorie deficit. If you have a higher body fat percentage and lower muscle mass, then you are probably burning fewer calories than if you had more muscle mass.
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.