This morning I happened to run across this news item. Here is the headline:
Traditional neck muscle resistance training may not protect athletes from head injuries
Medical Research News : Tuesday, 10-Jan-2006
And the site with the news item
http://www.news-medical.net/?id=15348

And the report itself is here
http://www.nata.org/jat/readers/archives/40.4/i1062-6050-40-4-310.pdf

I like the head accelerator shown on page two of the report. The crash test dummy dude looks unconcerned with his dark shades. On a more serious note, I realize this study has to do with soccer but I strongly suspect it has some value for boxers/wrestlers. I also realize it is only one study and one study per se does not prove anything. But I found it interesting nonetheless.

Yours in mad science,
Brian