Inversion is good for the spirit. A lot of yogis will tell you that every minute you spend upside down adds a minute to the end of your life, but don’t repeat this information in a room full of military dudes, because they will tell you how long a person can reasonably be suspended upside down before it kills you. So, I would say that, in theory, time spent upside down under your own power may improve your health. Or not. I have no studies on the subject.
When I taught a lot of yoga, I did a lot of handstands. These days, my wrists are not as reliable as they used to be, so I don’t do as many. Instead, I have an inversion table. My friend found it next to a Dumpster and, knowing my affinity for inversion, grabbed it for me.
Another fun fact about inversion is that it can decompress your spine, effectively making you taller.
But being upside down is just fun.