I swear I remember reading somewhere that fat is to some degree necessary for heavy lifting. By this I mean "world's strongest man", there was an infograph on 4chan that showed standard "strongest man" body sizes (generally relatively round) compared to a body builder, and it said something to the effect that the body builder might be more chiseled but the muscle was less functional. It was years ago though and I have no idea how I'd find it again, but do you have any idea what information I might be recalling? Was it outright horseshit or some edge case scenario? To be clear, from what I recall, it definitely wasn't talking about normal exercise in either case. It was a comparison of "strongest man" competitions vs bodybuilding competitions.