Instead of sending an email, get up and walk to a colleague’s desk. Personal interaction is good for your mood, too.
Drink more water! Besides keeping your hydrated, having to visit the bathroom will make you move.
Set an alarm to remind you to get up every 30 minutes. A simple egg timer or the timer on your smartphone can work. Even if you get up and stand and stretch every 30 minutes, you’ll be better off than remaining sitting.
Get a breath of fresh air a couple of times a day. Take 5 minutes and go outside. Then stretch while you’re out there.
Every time you move, you make your cells more responsive to insulin and your arteries less likely to stiffen.
If you can get your heart rate up for 15 minutes twice a day, even better.