I am so pleased I have just completed W4. I may repeat it as I am puffing a bit and really really cannot imagine going for any longer. Also I did W4R1 on the treadmill and feel I ought to do all three runs outside. I don't know why I think that, its just me, I think I enjoying being outside more. I'm a bit concerned about doing this as the weather gets warmer. I got so hot and uncomfortable today and I don't want that to put me off. Maybe I will have to go out early mornings before it warms up too much.