riverman wrote:
...
C) Not experiencing back pain currently, but with a history of it.

I've a history of lower back pain since junior high. Not coincidentally
that's when I started training to run in competition. The "cure" is
simple enough, but somewhat time consuming. If I want to run any
distance at all I have to maintain strong abdominal muscles and I have
to stretch both piriformis muscles COMPLETELY before a run. It took
me many years and many VERY good pills ;-) to figure out what a
piriformis muscle is, but now that I know the only time I get back
pain is when I don't stretch them well.

--
Ken Fortenberry