https://www.youtube.com/watch?v=4BOTvaRaDjI
I've had chronic low back pain for years, which I largely ignored until I started getting associated nerve pain in my legs. My lumbar discs are basically shot, the "lower back of an 80 year old" as my doctor says.
I've been doing this every day for 3 months and my back hasn't felt this good since I was in my 20's. Still got a pinched nerve that we're trying to figure out, but the low back is good. I can actually sleep through the night now, for starters.