Olympic swimmer Sharron Davies offers 5 inspirational excercise videos for office workers.

Posture and neck and shoulder flexibility (4:04):

Triceps and exercises to improve back flexibility (3:28):

Quad flexes, calf stretches, and ankle rotations (5:13):

Simple leg and ankle exercises (5:37):

About staying healthy in the office and demonstrates some dips, seat raises and bicep curls (5:16):