Hannibal the can.......

Well, the first time I put this thing on, my wife looked at me funny and said I looked like Hannibal the Cannibal...you see, it's this head strap thing that has a chain on it also where you put weights through so you could do neck exercises. It sure as heck looks funny cause it's made out of leather and underneath the leather, it has some sort of lamb wool, cause it sits on your head, velcroed to your forehead, so it's gotta be comfortable right??!! Then the chain hangs down where you slide the weights through and you do neck raises, simply to strengthen my neck muscles so maybe I can see my way into and out of turns without taking my head for a walk along the ice if you get my drift. So after every set of weights, I slap this thing on, with 20lbs, lay on the hamstring bench to simulate the skeleton sled, and visually put myself through one of the tracks I will be racing at this season. I actually do the courses in order that I will be racing them and for entertainment value for the gang at work, (that's where I work out), I also include all the steering motions, grunts and groans, the pretend hits into the walls, etc........it's so touching, they used to come and ask me if I was okay afterwards, he he, but now they are used to my training methods.
The question I have, since I am by far a scientist, is how much pressure in pounds is actually exerted on the body, specifically an unsupported body part such as my head hanging over the sled in this case, while in a turn exerting a force of 3g's. In other words, does holding up my head in such a turn equivalate (yes I make up my own words) 20lbs that I am training with, or should I be training with maybe 40lbs or 10lbs....now if someone can answer that question, I would be impressed!!