massage and the stroke patient
I strongly recommend consulting with his PT, MD, or other supervising medical professional. If he's been cleared to resume activity, you can probably engage him in some form of bodywork - but first you want to know about any potential concerns that might not be immediately apparent.
My preference would be to engage your father in active bodywork, such as Active Isolated Stretching (and strengthening!) or Muscle Energy Technique. He needs to be worked slowly, gently, and above all
frequently. I would also give him plenty of "homework" to practice on his own 2-5 times per day.
Frequency and duration of practice in the inital recovery phase are critical to rapid and full recovery. He needs to do most of the work on his affected side, but he should do all movements on his other side as well.
He will experience a lot of frustration at first, but the payoff in long-term results is tremendous if he puts in the time and effort. An intensive approach has been highly developed by Edward Taub, Ph.D., with outstanding results.
For more information, google "Taub stroke rehabilitation" and learn about their approach. The Taub Therapy Clinic site is here: http://www.taubtherapy.com/
I also recommend the book,
The Brain That Changes Itself by Norman Doidge, MD. Your father might also find some inspiration in it.
Hope that helps!