Most types of exercise are beneficial -- just minimize your risk of injury -- probably no skateboards. 

This is my morning  routine as of mid-2020.          (Note -- 2 or 3 reps not 10)

•     On floor – simple stretch, arms and legs;      (start 20 minutes after am C/L)

•     “Follow the leader” use right leg to “lead” left leg thru simple movements, focus on range of motion at ankle

•     Left foot doing movement independently 

•     Legs – left/right leg up (working out cramps prior to bridge)

•     Glute bridge/pelvic thrust (deep exhale)

•     Pelvic tilt (tight Levis concept, belly button to backbone) include pelvic floor (Kegel)

•     Dead bug (extend diagonal arm/leg)

•     Left and right side planks

•     Roll over to hands and knees  

•     Child pose – arms out, head down      

•     Cat and camel – arch back up and down

•     Alternate leg extended, from crawling position

•     Simplified push-ups

•     Roll to standing  (alternate left or right as lead leg, retaining ability to get up from the floor as long as possible) 

•     Step/lunge forward, arms back (alternate feet)

•     Step/reach sideways lunge (alternate)

•     Seated, edge of bed -- hamstring stretch, left & right leg

•     Seated, edge of bed -- bent leg stretch, left & right leg

•     Step-in-place,  (stepping/marching – up – down until upper leg will go horizontal)

•     Stride-in-place – stepping forward-backward, with weight transfer to foot; turn body toward forward foot, away from foot on backward, alternate legs (until weak foot/leg moves smoothly).    

•     Half-mile walk

Some people like to exercise/walk to music.  An alternative is to use a cane by touching the floor/pavement lightly (not as support) to signal the slower foot/leg to move.

Haven't completed reading and/or don't understand the application of the results of some of the following.  

Genetics and heritable risk  --  The information on genetics and Parkinson's is complicated and research appears to be moving in various directions -- I tend to focus on publications less than 5 years old. 

• Genetics in Parkinson disease: Mendelian versus non‐Mendelian inheritance   Link  

• Missing heritability in Parkinson's disease: the emerging role of non-coding genetic variation   Link   

•  Identification of novel risk loci, causal insights, and heritable risk for Parkinson's disease: a meta-analysis of genome-wide association studies  (Link  --  May have to obtain from library)

• PD and Genetics, info for genetics counseling  -- PD Overview 

• The Global Parkinson's genetics program:   GP2 Global PD Genetics 

• xx 

Research on future treatments --  Medications currently available for PD treat the symptoms, they do not affect the progression of the disease.  The PD community is eager to find a medication that is disease modifying or neuroprotective. 

• Disease-modifying strategies include: decreasing aggregation of alpha-synuclein, using GLP-1 agonists to decrease neuroinflammation, compensating for GBA mutations by enhancing lysosomal activity, inhibiting LRRK2, and inhibiting c-Abl.   Link to site. 

Articles may be in publications that charge for a copy -- you can obtain free copies thru a library or directly from the author.