Kevin,
This is a good thread. Im about 5' 6" and being a girl , i face opponents who are alot stronger than me , but aikido is not about who is stronger. It is about using someone strength against them. I think this is why most women choose aikido over other martial arts. (but dont get me wrong its for men too) . If u go try out aikido i think u'll better understand what im saying . Only u can decide if its for u.
hope this helps
-Paige