And most people actually suck at it. Source: I do martial arts. Also, my Grandma taught me knitting same principle applies: If you start doing it with your fine motor skills, letting those influence your gross motor posture, you’re going to cramp up in no time. Easy and relaxed does the job, move from the shoulders (or even belly), don’t even move your fingers just keep them static knitting doesn’t really require you to move them. Doesn’t matter when all you’re doing is opening a door or such but for repeated movements, or forceful ones, or ones that need to be stabilised against adverse forces (like a block) it becomes crucial.