There is definitely some science/magic going on here. Five/six weeks ago I struggled, puffed, panted and generally dragged my a**e around for 8 x 60 second runs. My breathing was all over the place, I was fast then slow and genuinely believed that this would be another flash in the pan for me trying stuff and jacking it in. However, today I did W5R2 and it was actually ok - again!! I say again as I say on every run that I won't be able to do it and every time I actually can and it's actually ok (although not so sure for the next!!). My breathing is ok, my legs and knees are fine and I didn't die! I know 2 x 8 minute runs is nowhere near the goal on W9R3 but it is massively hugely fantastically amazing for me. So, there must definitely be some science/magic that is working on me in my area!!!