Quote Originally Posted by hitmandonny
Have read in to this a bit...Its fairly scientific but here's what iv translated.

"Chin" can be somewhat improved by a stable, balanced diet. (chin can also be negated by the neglect of the diet.)

The overall level of fitness will affect the ability to take punishment, development of the neck/ upper back muscles and shoulders will all be beneficial.
You're right, the only thing I would add to that is to keep your chin down at all times to avoid getting hit flush. Guys like Hagler could take huge punches, but his head was always down and he would very rarely get hit flush.