Here is something nice for your lower back after heavy deadlift days.
Donnie Thompson demonstrates various back stretches using rubber bands.
You don’t even need to be fully suspended. I sometimes attach a band to a pull up bar, wrap it around my lower back while I lay on the floor. Or, another way to do is to just load up a dip belt with some plates and hang from a pull up bar. Feels awesome.
For more rehab drills see Mobility101.
Update: Dmitry Klokov also does some Spinal Decompression. Not with bands, but with a special apparatus.
We have a poshmachine here; no idea, who brought it here, but we use it on a regular basis, it’s really cool. You’ve seen that I do deadlifts on a daily basis. Due to that the muscles are so toned-up, that they don’t let the backbone stretch, to space the vertebrae, and let them take the proper position. Massage or hanging on a horizontal bar ease up this condition, but this exercise this machine really helps you feel how vertebrae go into the proper position.
Update: The Chinese also like to do it. Read Larry’s Chinese Weightlifting Experience.
Update: Another method from Russia.