The opposite of Moderation. An all or nothing attitude. Grinding is extreme.
Sometimes doing extreme things is motivating (i.e running 30km @ 5:00 with Lili, or getting back from Vegas @ 7:00am and going to work (also with Lili)), but ultimately behaviour like this is sporadic and inconsistent. I should strive towards moderation for a more balanced life-style. That being said, there is a time and a place for being extreme and it is much more fun and impressive than doing things in moderation which is the entire appeal.