Cool ad thanks, I jut wasn't sure what the story was, It looks really good for the MA but I didn't know.
You can use single head to training many throwing techniques. http://imageshack.us/a/img685/5167/singleheadbow.jpg http://imageshack.us/a/img577/7338/singleheadlegtwist.jpg http://imageshack.us/a/img840/8890/singleheadsweep.jpg http://imageshack.us/a/img718/1716/singleheadleglift.jpg http://imageshack.us/a/img221/1374/singleheadknifehookv.jpg http://imageshack.us/a/img687/1138/earthweight.jpg
chi shi is very important part of your martial arts training specially used in karate. It gives very impressive results.