kempoinfo.com

So my genius put itself on display recently…About 20 years ago I was told that good core muscles would help my back pain. Naturally, i went to work with sit ups and what not to work my abs. However, it was not until recently that I learned (not even figured out) that I need to engage those muscles as I move in order to protect my back! Pure genius.
Well what does this have to do with a kiai? I never had problems with my back while training. I think the reason is that through the kiai we engage our core muscles and therefore protect our back. Almost as good as the magic of qi!!