The journey of Seiunchin should be to first develop all the right technical aspects, making sure you dot all the I’s and cross all the T’s. There is no point being fast or explosive if you have poor technical habits as these will not serve you well in self-defence.
The best way to achieve this is to practise at home often (you might also practise before and after class). When you practise, go through the kata in super slow motion. Going through in super slow motion enables you to really think about each and every aspect of each movement. This allows you to perform it correctly, creating muscle memory and positive habits. It also allows you to identify poor habits (and correct them), habits that you may not have identified at regular pace. Going at this pace also means you wont pull any muscles or work up a sweat (so you can even practise in at work in your office).
Once you have practised it a few times in super slow motion, build it up to medium pace and then finally at regular pace.
