Hi all. I was dubious about taking up running at all, knowing that I have a degenerate disc in my back and having had a prolapsed disc removed in the 1990s, but decided to give it a go and am very glad I did. All has been going really well and I completed week 4 on Thursday but have been suffering from sciatic symptoms on my bad side ever since (mostly numbness and pins and needles rather than pain). I'm wondering whether the symptoms are due to tight ITB muscles rather than the pre-existing disc problem but am wondering whether I should start week 5. I have been fast walking on my rest days and started using a foam roller yesterday. Any thoughts?