I just finished W4D1. My body is complaining a bit, but not too badly. Mostly cramping calves and a sore heel. It's amazing, each first workout I think that I may have to stop and walk part way through. So far, I've managed to complete all the jogging intervals. Granted, I jog VERY slowly. But I manage. By the third workout of the week though, I find that it's not so bad. Just in time for the next challenge... Oh well. So far, I'm managing.
-T