03/09/2023
This conversation happens multiple times per day. People, usually women, receive their body fat % and then promptly overeact.
Usually their body composition looks like this:
Height: 155 cm
Weight: 55 kg
Body fat %: 35
Clearly, someone who weighs 55 kg is NOT fat. There is a name however for what they ARE.
SKINNY FAT
What is 'skinny fat'?
When you reach an acceptable weight, the wrong way, this is skinny fat. Usually, a skinny fat person has a perfect BMI, but they got there the wrong way (this is one of the major flaws of BMI).
Inside your weight are two kinds of mass: Fat Mass and Fat Free Mass (Mass without considering fat). If you reached an ideal weight (based on height) in a non-ideal way, it will be counter-productive. BMI (BODY MASS INDEX) considers all weight as equal. But in health, all weight is not equal. Generally, we want to see a higher proportion of muscle against fat. This will automatically create a healthy body fat %.
In our example above, our client has an ideal weight, low muscle mass, and relatively high level of fat. She is 'not' fat; but too much of her 55 kg is composed of fat mass. Inside the 55 kg is too much fat and not enough muscle. In other words, though her weight is low, it is composed inefficiently. She needs a better composition, proportionately.
Skinny fat is technically called sarcopenic obesity. This implies a relatively high level of fat alongside critically low muscle mass. One of the challenges of this condition is that society considers this attractive, but in reality it is not an ideal body composition. People who suffer this DO feel fat, do not look fat, and the results confuse everyone.
One thing to remember, body fat % is not the same thing as 'fat'. Fat is measured in kg while % is a ratio of fat mass to weight which considers fat free mass % at the same time, inversely.