The game I play pads the weapons, not the people. That alone makes the game very rough. My body is constantly covered in bruises and I've had bones broken and all sorts of nasty injuries. Another prominent group and perhaps the largest in the US is SCA where the people are armored and the weapons are rattan. Anything using steel weapons people generally just call "live steel" and there are a few different orgs that do that. The largest one in the US being HEMA which strives for historical recreation and has the most anal history nerds you will ever meet.
I've fought in SCA. Despite going into it thinking the game would be more rough and more badass in some way, fighting with foam is much more rough. All the weight of the armor and weapons slows you down significantly. I kicked a lot of ass when I played that game and I think it's just because the background of how I fight is always lightning fast, so the muscular memory I've developed is just at a higher speed to where my body is moving more out of instinct than consciously thinking about my moves. Foam fighting produces better fighters than armored fighters for this reason.
I started fighting when I was 16. I'm 31 in the above video. I'm the guy wearing all black. Here in SoCal it's socially acceptable to be into nerdy stuff and all the people you see in the videos are pretty "normal." When I began fighting in TN the only people who would do this stuff were at the absolute fringe of society. There were lots of heavy drug users, people with violent anger issues who used the sport to deal with it, truly insane people, modern day nomadic drifters, people with scars from bullet holes on their bodies, ex convicts, and despite us wearing fantasy clothing ect it was quite a testosterone pit where fist fights would break out a lot. Someone broke my arm my first battle practice and I think he was legitimately trying to hurt me on purpose. At events there were tons of drugs, promiscuous sex, people vomiting everywhere from drinking ect... As someone who grew up in rich white neighborhoods and went to private schools I think it was good for me to suddenly be surrounded by such different people. The game toughened me up and it also gave more of a "give no fucks" attitude about my different eccentricities, which people find attractive.