This is a somewhat common phenomenon in the martial arts that practice Tai Chi/qigong/reki
I used to teach a martial art that practiced this. In our meditation, you visualize glowing energy flowing through your body into your hands. After several months, it happens fairly naturally. Among more experienced practitioners, the skin temperature difference is very noticeable.
When we practiced this, we conflated it with hitting harder, which anecdotally seems to be true, but I'm not sure why.
My teacher claimed that doing the meditation and slowly working your way up to hitting harder materials would increase bone density in your hands, though I have no proof of this.
I'd love to see more western science studying these phenomenon.
I used to teach a martial art that practiced this. In our meditation, you visualize glowing energy flowing through your body into your hands. After several months, it happens fairly naturally. Among more experienced practitioners, the skin temperature difference is very noticeable.
When we practiced this, we conflated it with hitting harder, which anecdotally seems to be true, but I'm not sure why.
My teacher claimed that doing the meditation and slowly working your way up to hitting harder materials would increase bone density in your hands, though I have no proof of this.
I'd love to see more western science studying these phenomenon.