Great thread! Me personally, I can only strike using the instep or the shin. Whenever I try hitting with the ball of the foot, I always end up striking with my toes. Is there a trick to hitting with the ball of the foot?
There are quite a few serious women competitors coming out of Japan right now, in particular a woman by the name of Megumi Yabushita. Search for her on YouTube if you're interested.
Do any fellow karateka have tips for an individual who wants to desperately improve as a fighter and overall martial artist despite a jittery personality?
Finally found a link that shows the Machida/Hogar fight from UFC 67. Apparently Machida fights with Shotokan and Brazilian Jiu-Jitsu. All I can is that this fight was good!