Yes, this really is a thing, although it is the popular press giving it the name “Skinny Fat”.
Weight and Body Mass Index can be within a healthy range. Clothes still fit comfortably and clothed you look great. But, naked in the mirror you look a little flabby or not as toned as you’d like. This can be down to carrying more fat than muscle thus having a Body Fat percentage which is too high.
There are several ways to calculate the percentage, the most common being with the use of callipers but a simple test you can do using a tape measure will give you a rough calculation. Personally, I like to use both methods!
The calliper method gives me a percentage of 26.5, the tape measure method, which you can try here gives me a percentage of 22. This isn’t all completely definitive as ideal figures depend on more than just your age as activity levels, height and medication can be factor, too.
BODY FAT % ADJUSTED BY AGE FOR MEN
BODY FAT % ADJUSTED BY AGE FOR WOMEN