Lots of athletes will say they were at 4% or 3%, sometimes 1 or 2%
I don't know what methods they're using... But they are either exaggerating or have had a misleading measurement of bf% done
These individuals may be lean, but nowhere near shredded
4% is as low as you're gonna get, and that's shredded to the max onstage amdulah aykutlu/munzer like conditioning