Everyone loves a bit of mental toughness. Coaches will often tell you they only want athletes who are mentally TOUGH. Athletes strive to develop their mental STRENGTH. Sports journalists write and debate about which athletes are mentally TOUGHER than others.
In fact, mental toughness has become one of the most commonly used phrases in sports. I should point out here that I have no evidence whatsoever to support that last statement, but it seems like it’s probably true. Just search twitter for mental toughness or mental strength and you’ll see what I mean.