I'm quite lucky in that I have a real office and locking door, instead of a cubicle or shared workspace, so I find myself after my lunch-time walk, locking the door and stripping down to my skivvies until I stop sweating. It is not ideal.
I do bring a t-shirt and sports bra to work and I've come to the conclusion I have to bring a hair dryer and possibly work-out capris to wear, as it's only going to get hotter on my lunch-hour walks. I keep deodorant and some powder spray in my filing cabinet.
I thought I'd start this thread to see if anyone has any tips or tricks to keeping a professional appearance while trying to get fit.