Stress is a factor in all illnesses...why we got pd and others get allergies is too complicated to figure. I grew up in a dysfunctional family and so is mine now. The parent that didn't exercise died at 56 of pancreatic cancer. The one that exercised died at 84. The longer living parent was by a large margin the 'uptight' one. The one that died held it all in.

Exercise is medicine.
IMHO