Uchinanchu
Green Belt
Speak for yourself!While the OP video referenced CMA training let me state JMA/Okinawan - depending on the style and instructor's preferences and the training he had received - also had "quirks" in training & conditioning drills etc... But was it part of an established core curriculum, probably mostly not - more of an adjunct tradition?
Most of these methods IMHO have now become "myths" in part due to consumers (students' feedback and tolerance to endure any of this) and of course the bane of us all - lawyers & lawsuits.
Take something as benign as being corrected in a traditional karate class with the whack of a shinai - i.e., onto your quadriceps to emphasize you need to correct the depth of your front leaning stance. This probably doesn't happen much these days in karate classes in America, eh?
Also the advances in knowledge of exercise physiology science during the past four decades would put many of "bizarre" drills to bed if the had an outside peer review. We (martial arts practionors) don't live in isolated Okinawan fishing villages anymore do we?
As far as hitting trees, that's for wussies.
I remember watching a 1960s video of traditional Japanese karate - they had the instructor doing a demonstration by hitting an old stationary locomotive engine with his blocks, strikes and kicks - flesh and bone onto solid iron.
Just watching & listening to the "thunking sound" of these impacts - caused my limbs to get bruised. Thunk... Thunk... Thunk!
I guess I'm a very big wussie!! Heh!Heh!
I remember that video too. If I remember right, it was from the BBC TV show, Way of the Warrior. I used to do something similar with I-beams and water tanks at work when I was still in the service (ahh the memories...)