Originally posted by cconstantine
You can also use weapons of different wood than Oak. I have a jo stick made of Hickory.
Technically speaking, hickory has better mechanical properties than Oak (its a hard wood like Oak, but it has finer grain, it's stronger, and more resilient.)
I believe I read somewhere that hardwoods are not considered good for training. Admitedly they are stronger and more resilient, but don't they have a tendency to be brittle rather than ductile therefore when they break they pratically shatter and splinter, rather than just spliting. I also understand that the hardwoods are bad for those using japanese white oak as they tend to cause more damage. So your nice hardwood weapon is ok but you can dent and damage your partners weapons.