Glad you asked! You have to plan for it!
Walking is wonderful!
We are made for it.
We're so worried these days about the least little hint of perspiration, or scent of an exercised body! Don't be!
A quick cleanup and changing your top gets you back at the desk smelling like, well, you!
What about lack of opportunity or space?
Got stairs? Stair climbing is a great way to build and tone your butt and legs. Get creative. There's a lot of ways to do steps. Lots of calories get burned and legs get slimmer!
Try standing up while you eat. The right type of lunch will make this easy and you burn calories and strengthen the little stabilizing muscles while standing.
Before you know it, you'll be a shadow of your former self!