Just about to start week 3.
To provide extra incentive, I've registered with Park Run and downloaded my barcodes.
I extended my last 3 sessions to 5k, and I'm checking results of my local Park Run to see where I would have finished.
Next to last of 180 at present!
It can only get better!
Good luck at park run today 
After a week and a half of c2k5 I knocked 2 mins off my parkrun time.. i didnt go to Parkrun last sat but I'm hoping for 1 minute off today too. You can do it! ✔
Well done..but please take care.. extending runs at this point is not a good idea. If you intend doing Park run soon, then please use it for whichever run you are on at the moment.
The running muscles need a long time to build and hidden damage is just that...hidden.
Check out this post too..
healthunlocked.com/couchto5...
A great deal of advice for new runners, to get you to Graduation injury free.
You’ll never be last at parkrun, not that it matters, parkrun is fab, it expects nothing of you, other than to go along and join in, going along as you want, walk/run etc. Lots of people do the programme at parkrun and do the warm up/down walk as part of it, and walk the rest.
The only thing I would say is parkrun is for everyone, they’ll be gazelles and racing snakes, plodders, all shapes and sizes, walkers, don’t fall in the trap of thinking you ‘have’ to be a certain speed, you don’t, parkrun is yours to use as and when you wish, and above all enjoy.
Come back and tell us how it goes
Mx
It sounds as if C25k is not demanding enough for your ability, which is what I thought when I did the plan five years ago, so I ran the entire thing flat out, which I now realise was the classic newbie runner mistake. Because I have learned so much more about the physiology of running in the intervening period, I wrote this post to try to point out the errors in my former approach. healthunlocked.com/couchto5...
We all bring differing levels of fitness to the start line, but if you were a non runner before you started then taking it slow and steady really is the safest approach as it takes many months of running for your body to adapt and your injury risk to reduce significantly.
Please read that post and in particular the links towards the end to the stories of two runners who thought that they could just go out and run as hard and as far as they were capable of, without any repercussions.
Too much, too soon is a recurring theme on this forum.
Take care.
I just downloaded my barcodes too - makes you feel like a proper runner! 😁
I'm not a runner, but I'm a very keen walker. For the past 10 years I've been doing 10 miles twice a week on the local moors. I do walk quite fast, but it wasn't straightforward to step up the pace. Consistently taking deeper breaths didn't come naturally, strangely enough. It seems strange that the body doesn't instinctively do whatever is necessary to get the extra oxygen it needs.
just signed up for a quarter marathon
Completely useless runner signing up...
Signed up for my first run. 
Eek! Just signed up for a 10K!
Signed up for mad dog 10k
