I tried doing a search here, but didn't find anything directly on point. I did find an article by fish of doom, but I have to admit that I didn't understand it very well. I'm confused about the differences between karate punches and boxing punches. I'm a low level belt in isshinryu and have taken some Shotokan as well. In those arts, I was taught to keep the shoulders square when punching, the power seems to come from the forward movement. When there isn't any forward movement, the the power seems to come from the shoulders and lats, but it doesn't seem to be as powerful as a boxing punch with full shoulder, hip rotation. To add to my confusion, I picked up Iain Abernethy's applied karate dvd. His karate punches look very close to boxing punches! I also found a blog called 'way of least resistance' which has an entry saying that there is a difference between the two punches. A karate punch has less force than a boxing punch, but that is by design to leave fewer openings when attacking or countering. Finally, there seems to be a difference between the reverse punches of shotokan and isshinryu. Shotokan has hip, shoulder turn but Isshinryu doesn't. It's power seem to still come from forward movement. Can anyone take a stab at explaining this a little? Do these punches have different purposes, ie a knock-out vs not getting hit? Is an isshinryu punch just an "arm punch"?