Re: Kokyu Nage techniques do they work?
Do a search for "Ki" on this board, and you'll get more than enough info I think, if you can wade through the bickering.
I just put up an article about the basis for developing a body in a martial context (in the training section), and that stuff applies directly to developing "kokyu" power.
From my own experience I'm pretty sure that
a) its not timing
b) while breath can be used to help train it (from a physical perspective), it is not just the "breath"
c) it is a physical skill
d) you can train the body directly to develop this skill within 2 years if you know how.