Did w8r1 last Thursday and stopped after about 10 minutes. I kind of stumbled a bit and felt an ache in my upper thigh. I carried on a bit and it happened again, so I stopped. I'm not a wimp, and I did consider "running through it" but decided to stop in case I made it worse. I went home and got my cheap Aldi roller out and spent 15 minutes flopping about on the floor like a demented walrus. It did seem to help.
So my idea was to wait till Monday and have another go. I'm not worried about the run I know I can do that, I just don't want to make it worse.
The other thing is I got a new pair of shoes and I wonder if that was the cause. I'm gonna do the run on Monday in my old shoes just in case, then do Wednesday in new shoes if Monday goes OK.