Wearing a headguard in boxing won't stop your head from moving at all when struck, your head will still jerk back if you get hit with a good punch, obviously.

The theory apparently is that since the headguards they use offer some sort of support to the neck, they slow the head's movement down more quickly after the initial jerk. Whilst the skull's movement suddenly stops, the brain keeps moving and crashes into the inside of it, like a person not wearing their seatbelt carries on moving into the dashboard during a car crash.

If the person is not wearing a headguard, the skull slows down at more like the same speed as the brain, thus causing less of an impact of the brain onto the inside of the skull.

What we really need is a headguard that can fit in between the brain and the skull!

So it would seem from my understanding that if any of us sorry lot are planning to enter a boxing match we should not wear a headguard, lol