No, doesn't feel like an injury at all, more just sore and a bit weaker than they were before. I reckon its just the post exercise stuff... so going to the treadmill was a good idea. I only did 20 minutes on an easy walk, but I thought I'd better get back on the horse... tomorrow I aim to do more than the 20 minutes on the treadmill, I'll aim to do the cross trainer as well but I'll leave the rowing machine that hurts thinking about it!!