Completed week 1 R3 last night and feel great... For years I have felt achy and sore just getting up out of chairs etc (and I'm embarrassingly young for that to be the case) but I can really feel that changing! In fairness, probably more to do with the stretching afterwards than the runs themselves, but anyway!
Biggest dangers on last night's run was dodging round folks looking for pokemon and swallowing several hundred midges...