I'm not sure because my fine/gross motor skills are exceptional - and I could use my head at the same time, as I tend to an ENTJ. Then again, I have speculated on being a borderline personality type, and typically tending to an ENTJ.
That's fascinating. It looks like the least philosophical/abstract people in the world, athletes, are coming up with their own way of defining the differences between people, and it lines up with ours.
Guess that means there's some truth in it.
Does not work for me. I've got mad gross motor skills. Fine motor, not so much.