I don't recommend practicing these skills, because they are killing skills and destructive, so they are not recommended. If you want to be healthy, you'd better practice static qigong or yoga. Although practicing static qigong and yoga won't make you feel amazing, it is good for your health, better qi and blood, and better spirit. This is the way to keep fit, I recommend it.
Hard qigong is not very practical. You can watch more martial arts movies, thinking that the martial arts masters in them are so powerful that it is impossible to practice hard qigong in reality. If you meet a rogue, two or three people can easily hit you with a small iron pipe. If they have knives, you are even more defeated. Although hard qigong looks awesome in front of everyone, from my point of view, it is 250, which is the work of a reckless person and a short-sighted person, so it is amazing.