It could also be heavy bones. Although I guess that wouldn’t get you to a 90.
Also, I think white muscles (fast-twitch fibres) would be have a higher specific weight (due to lesser capillaries), which could also make someone heavier without looking fat.
I’m not sure. Unless you are 1.90m tall or very buff, 90kg puts you in the overweight category.
It could also be heavy bones. Although I guess that wouldn’t get you to a 90.
Also, I think white muscles (fast-twitch fibres) would be have a higher specific weight (due to lesser capillaries), which could also make someone heavier without looking fat.