Competition bodybuilders do special maneuvers to reach an extremely low body fat for competition that go beyond steroids, like using clenbuterol and deliberate dehydration. This guy already has a wide waistline in competition, it's all downhill from there.
When I was a US Army Major in my mid-thirties my duties included teaching several periods of "Military Physical Conditioning" every week in college. And one of the things I had my students do was a caliper "pinch test" for body fat. I was shocked by the results. I came in around 10% myself.
There was some US Federal agency on campus, and they were doing a study about different ways to measure body fat. They wanted me as a subject because I was in the correct age range, and obviously active and in good shape. So I agreed. They wanted to compare different ways of measuring body fat.
The caliipered me, then I was submerged in a water tank. Finally they put me into some kind of whole-boday radiation detector, after injection with trace material. The results were all pretty consistent, about 9.5 %, which served to validate this new radiation method.
But I was advised that below 10% I ran some health risks, and was told to bulk up. After reassingment from ROTC that began to happen naturally, and it's been happening ever since.
Back then younger men were advised to ideally stay around 11-15%. I don't know what the target is now. I'm certainly way over it today, but coming down again.
What really shocked me was some of my young male students who looked really buff, with 6-packs and all, registered fat content in the mid-20s, as females do. And when I administered controlled strength tests on them, as I did at the beginning of each semester, they were way weaker than I was!
Guys bigger than me, 12 or more years younger than me, looking like an Adonis. But they were a fascade, all plaster. High school and college eating habits had made their muscles all marbled with fat. They weren't fat like having a beer belly spare tire, but the fat was there just the same, invisible, robbing their strength. It could be measured.
And we'd do exercises together and I could smoke these guys. I was in my mid-30s, some of them late teens and early 20s. They looked better than me, but couldn't perform worth jack-s*it.
You don't have to be an extreme body builder, which can look freakish. But you gotta work your muscles to remove hidden fat, and build muscle. That's what I stressed in my classes.