Let us know if this works? And, what other things are working for you to maintain mobility and health? Have you found any other links to exercises, stretching, yoga etc that work for you?
Link to Chair Yoga videos:

Gloria
**Important - everyone and every-"body" is different, consider first whether this or any exercise routine is correct for you. Listen to your body and your doctor. The effects of adrenaline from exercise (and stress, cold, heat etc) can cause problems with OT and all tremors.