There are chair yoga versions of most postures to increase mobility, vitality and flexibility: sun salutation, forward bends, back bends, spinal twists, sitting mountain pose, eye exercises (helps computer strain) and breathing exercises (calms or energizes and increases concentration). If there aren't modifications for poses you enjoy, you can create your own. Some movement is almost always better than no movement.
We are also living in a world where in medication, exercises and other extracurricular activities can help us reduce stress. Perhaps, the need of the hour is to curb our stress down. It is absolutely an easy task to de-stress from the daily grind of a hectic schedule. There are plethora of options on de-stressing.