The step up at the beginning of each week so far has been a mental challenge - you get "used" to doing the previous week's splits, then you look at your new challenge and think "can I do this?".
This morning I proved I could!
My first five minute jog did feel like it went on forever, I definitely needed determination, then at four minutes my music dipped and the voice said "one minute left" - I was so sure at that point that it must have been the whole time that I slowed down, but no, I pushed for that last 60 seconds and completed it!
The other perceived barrier of week four was that the "rest" walks halved, but the programme must know what it's doing and after three weeks, we're learning how to regulate breath etc quicker.
I did feel shattered at the end of it, but also incredibly proud of myself - thinking back to the gibberish wreck at the end of week one run one, it's astonishing to see the change in a really short time.
That said, I'm really looking forward to my lie in tomorrow!