There's a great sit-down exercise video available through PDF. "Motivating Moves for People With Parkinson's" by Janet Hamburg. I met her at a PAN forum, and she is as animated and jubilantly encouraging as the video portrays.

Information on how to obtain a copy can be found at:
http://www.pdf.org/Publications/motivating_moves.cfm

or visit Janet's website:
www.motivatingmoves.com

Peg