On the 'just do it' principle, I started C25K wearing normal clothes and in walking boots. Today was supposed to be a run day. I usually put on my running stuff first thing but today I couldn't face being hot and then ending up not running after all (which I knew was a possibility today) so it was only the sport bra and then normal clothes. The dog needed her walk and I thought "Shall I change?" and then realised I'd probably just give up on everything by the time I'd changed and the dog would lose out. So just set out for a walk instead... and then on the riverside path I thought "No, I want to run now, not tomorrow morning" My active sandals are very comfortable. So off I went and it was great, polished off my 30 minutes so easily it was like it wasn't really happening. So there you have it - sandals, jeans, knit top. The funny thing is the dog gave me exactly the same "Have you gone completely mental?" look she gave me when we started C25K!