I've just done w3 run3 and I'm quite enjoying this running lark. Haven't made excuses or put off any run and pretty much ran every other day since i started this. I do it at my own pace....slow! I feel good, the odd achy bit here and there sometimes but not painful and I feel fitter and more awake already! I don't sweat buckets but i do go red my skin feels hot and my heart rate increases and I have an after run glow, all normal! But....i have this very odd thing happen after every run when I just cannot get warm. I eat my tea and then spend around 2 hours shivering to the core. I layer up, get under a wool blanket and have heating or wood burner on and still feel frozen. My skin is warm to touch and my feet feel warm but I feel frozen on the inside....to the core and I physically shiver with the odd teeth chatter. It happens every evening i run and it is the only negative thing. I can live with it no problem but i just wondered if anyone else experiences the same.