I am sure this will have been discussed at some point but I can't seem to find a search option on here so I'm asking the question again.
I am nearly through my week 1 (finishes tomorrow) and for the last 2 runs I have had really bad pain/ache in my lower back on my left hand side. It was at the point yesterday that I stopped to bend and try and relieve the pain.
It seems to be worse in the walking stages than the running.
Anyone had the same problem and have a solution?