First of all, let's not talk about usefulness, just say how many people can stand this kind of fitness? Like a psychopath, hang your head on a rope and rely on your neck for all your weight. I can only say that you survived this exercise, which means you are lighter. What's the difference between this and hanging? I strongly recommend it. Don't try this method if you don't have someone who has practiced specially like aunt, otherwise you may hang yourself rather than commit suicide.
So for the sake of your life safety, don't try, it is likely to bring danger.
We have already said the danger of this kind of sports, so let's talk about his sports effect. You hang your head, and the weight of your whole body is supported by your cervical vertebra. If the bone density is not high enough, your cervical spine will be easily pulled apart and basically cool. Of course, if you are not dead, you can really exercise the cervical spine and increase the bone density of the cervical spine, which can be said to be beneficial, provided that you are not cold.
I can introduce you to many ways to keep healthy. You shouldn't use this kind of exercise. It's really dangerous. Not everyone can adapt to this kind of exercise. This kind of exercise is not called exercise. If you play like this in the park in the middle of the night, you may be scared to death.
Personally, if you want to exercise, you must choose a suitable and non-dangerous exercise method. We all exercise for good health. Don't try those dangerous exercises, the effect is not very good, just like walking a tightrope. If you have the conditions at home, you can ask a fitness staff to teach you specially, so that your exercise is not only effective, but also safe. If you don't want to hire a coach, you can use the fitness APP. There are too many online fitness apps now. Although excellent courses need to be paid, some simple exercises are enough for you, at least they will not bring you danger.