The question about sprinters.. doing weights a certain way promotes the recruitment of fast-twitch muscle fibres which means and more explosive and powerful and ultimately, fast athlete. It is the same reason why boxers do weights and have big upper bodies.
The full comment was actually, 'you can't put muscles on your chin, I've looked into it and it can't be done. However, if a fighter does have issues regarding his punch resistance, you can get around it by only putting him in with feather-fisted opponents'.
Click on post reply and there is a little icon (insert image) with a mountain and sun. Click on that and put the link to the image. Use imageshack to host the image.
Click on the little paperclip and manage attachments and upload the image. Then in your message click the paperclip and then click on the file name. I think it only lets you upload 1 image this way though.