I don’t know as I have not worked in the field but story time. When I was young there was a cheap judo class taught at the Y. I did that for at least a year I think. I actually came back to it and quit again. Anyway I did like it and like martial arts in general. I would pick up free classes at tae kwon do places (influenced a bit by a korean freind) heck even hop ki do (forgive spellings please). Degerberg would have free things and then lastly in college there was a jujitsu club and I did that for awhile. Anyway I was with a friend and the library had this thing of concrete stairs that lead up to it. Not real steep and kinda a path but the one set was standard steepness I think. Well I was not watching where I was stepping and kinda caught part of the edge with too much momentum. It all happened fast but my brain figured out what was happened and I guess I did the classes enough to have a bit of a reflex and I did a forward rolling fall down the stairs and the distance was perfect enough for me to end up standing at the base. My friends start laughing and I was yelling at him that I could have been really hurt. He replied it looked like I did it on purpose the way it came out. Ok so neigher hear nor there but I can say in learning to fall its a combination of being active enough to make sure you don’t hit vital things like your head and generally your bones. You basically want your meaty bits to absorb the shock. In addition though you basically want to relax into the fall. The more relaxed your muscles are the easier they can take the hit. Again not in the field so I can’t say for sure but many martial arts teach falling and honestly I think its about the most practical thing to learn in martial arts.