Here’s a video with Bajiquan practitioner An Jian Qiu. Bajiquan was the martial art of the Chinese Imperial Bodyguards. Notice how direct and explosive it is. This is a great example of it.
Later you can see him do some iron shirt training to toughen the body. Many martial arts contain this type of training in one form or another.
What I like the most about this guy is how the energy just explodes off his limbs. That’s real skill. I wouldn’t want to fight him.