Axis rotation and centre of Gravity plays a huge role when executing kicks etc. I have been lately reading up on how one can improve 'stability'. One obvious answer is by practicing techniques over and over again but there are other exercises one could do to complement training. I found this link which seems useful http://www.livestrong.com/article/551760-what-helps-strengthen-your-center-of-gravity/ Are there any particular exercises you do (or get your students to perform) to help improve stability? Especially when executing jump techniques?