My lower back has started hurting. The pain is around the small of my back and varies from a dull ache when I have been standing or sitting still for a while to a sharpish pain when I "bend in the middle". For example, standing with feet together bend down to touch my toes. I've had it for a couple of weeks now and it has really affectedmy running (only been out 3 times in a fortnight). I have been swimming to try and compensate but I really need to get back on the road. I am seeing a massage therapist about it tomorrow so hopefully that will help. I have also been doing lots of core work (crunches, leg rasies, side ways crunch things on the hyperextension machine, and hyper extensions). Any idea what it could be or how to make it go away? J.