Dips. On the edge of the desk, place palms on the edge on either side. Feet together, bend the elbows, slide forward off of the desk, dip down a few inches, and then push back up.
Forearms. Stand at your desk arms straight, place palms on desk with fingers pointed toward inside. Lower body slowly until stretch, hold for 15 seconds.
Magic carpet. Sit in chair with legs crossed and feet on seat. Place hands on armrests, suck in gut, raise a few inches above the seat. Hold for 10 to 20 seconds, rest, repeat.
Mermaid. Hold one wrist over your head with the other hand and pull it, stretching, keeping shoulders down, holding for ten seconds.
Push Up. Stand a yard or more away from your desk, with feet together. Place your palms on the edge of the desk a shoulder's width apart. Lower your chest to the edge of the desk, and push back up. Remember to exhale on the way up. Do 20 times.
Spinal Stretch. One hand on the desk, the other grab the back of the chair, twist, hold for 10 seconds.
Squats. Over chair. Try with one leg.
Stretch. Shoulder to ears; shoulder blades joining; holding a door frame and walking forward.
Shoulder Spin. Arm tries to reach the other one behind the back, between the shoulder blades, palm out.
Wooden Leg. Sitting in chair, extend one leg out straight and hold for two seconds. Then raise it up as high as possible, hold it two seconds. Repeat with each leg 15 times.