While perhaps not the missing link you would commonly think of, let me explain how the existence of one may account for a lack of progress for yourself. The pursuit of optimal or elite level aesthetics is one where you don’t start off with all the habits you need to get it done right away. Suffice it to say that achievement of such a goal is rather elusive like Bigfoot himself. It is an ongoing process where you build upon habits and what is initially hard to do becomes easier over time. Personally, I’ve built upon small habit changes, improvements, and tweaks to my regimen over the course of years to arrive at where I am currently. And it’s because I built these habits into my lifestyle, and into my daily routine, that they are no longer difficult to achieve.