Recently I got into a heated debate about swinging arms when kicking. It all started with this video: The kicking starts around the 1:10 mark. Some say the video isn't working. Here is a link: h ttps://www.facebook.com/martialartsdrills/videos/885088858330865/ I say that there is no reason to swing the arms. I believe that the hands should be held up in chamber where they are useful for offense and defense. Swinging arms are useless unless you want to provide them as a convenient handle for a grappler. Those swinging arms also come in handy for getting you kicked in the ribs or the side of the head. I teach speed. That's my specialty so I'm looking at this from a speed perspective but also from the perspective of being effective. Nothing matters more than being effective. Those swinging arms have to travel back to chamber to be useful. That takes time which kills speed. The outstretched arms can't effect any defense and they cannot deliver a strike. The swinging arms put you in a slow and ineffective position. I was asked who I thought I was to counter 100s of years of martial art history and countless professional fighters: 1. I've never trained in an art (I've trained in eight) that wouldn't smack you on the head for swinging your arms like that. 2. The only time I see pros kicking with a swinging arm is when they are in a very dominating position in which they know that they can get away with it or when the potential reward outweighs the risk. And those are typically power kicks. Again, this is a speed drill. I also got lectured about power and how it is necessary to swing the arm to develop power: 1. THIS IS A SPEED DRILL. Not a power drill. 2. I don't think that the swinging arm is necessary to develop power anyway. You should be able to throw power while keep your hands where you can use them. I know that you will see Muay Thai fighters kick similar to this when delivering a power kick. Again, the video was a speed drill and MT fighters typically go to the arm swing when in dominating position and delivering max power. Any other time they have their hands up where they should be. Lastly I got lectured about how the outstretched arms are needed to maintain balance. 1. If you need to extend your arms to maintain balance you need to work on your balance. 2. What I said in number 1. So here's my stand: 1. To be effective you need your hands where you can use them. 2. Swinging arms do nothing good for speed or effectiveness. 3. With some minor adjustments in body mechanics you can throw full power with your hands in chamber. 4. Your balance should be developed to the point that you don't need to use your arms as ballast. 5. You should drill like you're going to perform. Drilling one way and expecting to perform another is a recipe for poor performance. 6. The kicking form in the video is pretty bad too but that's another debate. What say you? Edit: OK, I'll bow out of the power debate. I should have stuck to speed because that's what I do. I'm not a full contact guy and I've never trained MT. I only mentioned MT because I have great respect for MT and they are great at having their hands up when they need to be. I know that they use tremendous hip rotation for power like I mentioned above. For speed I deliver my kicks with a straight chamber aimed at my target and only a slight hip rotation at the end. Purely a speed kick. I still say, for me and anyone who wants to train for it, that you can kick with speed while keeping your hands up. Sure there is movement but they can be up. The body mechanics require a few minor adjustments but they all lend to faster followup kicks and strikes.