The science of "blocking" roundhouse kicks: Part 1
Here are a couple of questions that were recently posed on the Traditional Fighting Arts Forums by "Kframe". I thought it would be useful to post them here along with my answers: "Ok, now here is a great question with regards to the round kick and movement. We all know that moving up the circle past the apex will cause the round kick to lose a lot of power. How far does that movement have to be fore it starts losing power? How much power does it lose in the first few inches past the apex?" A roundhouse kick loses force exponentially the moment it passes the apex. How much is lost in a few inches? It isn't easy to say definitively, but I'll give it a go in a minute (I'd need my brother to do some more precise calculations). Let's just say that even a few inches and I think you'll have lost more than the kick was worth. That's exactly why the Muay Thai defences below involve body shifting sideways (ie. "taisabaki" or "