I'd been afraid of this one, it feels like week 5 is when it all gets real. So did day one this morning, and it was only a mild ouchie. I'm certainly noticing an improvement in my fitness in that my recovery during and after the run is quicker, and that my mood is getting a boost too.
I have to say I'm not exactly relishing the thought of the long run at the end of this week, but I feel that if I persevere, and keep in mind why I'm doing this then I'll get through. Wish me luck for the weekend though, that's when it's happening!