54 years of age here and I cannot seem to get past the 12 mile mark
due to my left lower back muscle. It is not a disc problem for I had
half of it taken out 13 years ago. I have to stand up on the bike and
stretch forward to relax it but quarter mile down the road there it is
again. I am thinking that maybe the muscle is weak and needs strength
so anyone experienced this and what exercises or whatever is done
to rid myself of this albatross?