I've been doing it since January 2020, which is crazy now that I wrote it down. But I lost 100 pounds that way and I don't know how to be healthy otherwise. I bike, climb, hike, play in three bands and do a pretty physical job, I often do multiple of those things in a day without issue.
I don't know where I was going with this, but I don't find it to be unhealthy, in fact I feel like I was probably closer to death before.