When the time is right, I also suggest you send him this link, which is a motorized exercise bike SPECIFICALLY DESIGNED to help ease AND improve Parkinson's symptoms. This was a client of mine a few years back, and people with Parkinson's swear by this bike. It IS expensive and IS an investment. Parkinson's patients say that it takes dedicated exercise to experience relief. Physical therapists and neurologists support the efficacy of this bike. High repetition exercise helps to develop new neurological pathways that help heal and restore the body's physical functioning. Read the testimonials. The investment is worthwhile.. Parkinson's patients state that they feel they don't have a disability after buying and using this bike. It's very effective therapy.

Here's the bike:

Buy The Best Exercise Bike for Parkinson's Patients | Theracycle

Here's an article about how repetitive exercise, and especially high repetition exercises that this bike offers, helps the brain to heal and improve motor functioning:

Exercise Program for Neurological Disorders | Theracycle

Here's several video customer testimonials:

Parkinson's Video Customer Reviews | Theracycle