What a bleak picture! It is dark and depressing and fortunately, I don't occupy it very often, but a little angst every so often helps to write poetry and poetry is my sanctum sanctorum
For example, I was wallowing in self-pity when i wrote this poem, my vision of life. When I was finished writing, I liked the result. I had my poetic-high and I was ready to take on the world.
There is a gate with no fence
But it's shut tight and locked
So I stand on the outside and wait
My life is a thread cocooning the lock
But the clock in the yard's running late
And that clock has its hands on the gate.
How is it, given our prognosis, that not all PWP suffer from depression! Some do, others do not.
Depression can be a fact of life for some PWP. It can be depression brought on by being tagged with PD or the clinical depression that, for some PWP, is a symptom of PD. I have never been depressed (touch wood) but I have seen it and it ain't pretty. The advice of the experts is to exercise. Pull yourself up by the bootstraps and suffer the joy of running, weight training, walking, swimming. You know the drill.
Good advice, but what if you are barefoot?
I attended a lecture a few decades ago in which the lecturer, a distinguished professor from Syracuse, advised that if you have a need to exercise, but would rather be sedentary, drink a bottle of coke. Your blood sugar will shoot up and when it does, within a half hour, get moving and that liquid motivator will last beyond your blood-sugar-high.
I imagine there are better ways of obtaining the energy to get moving, but they won't taste as good.
Whatever is your motivator/motivation, just do it; exercise, then exercise some more and heed the words of Socrates who wrote:
It is a shame for a man to grow old without seeing the beauty and strength of which his body is capable
Take ownership of your body and keep it tuned up and you will be amazed at how it responds, but don't bother complaining that you don't deserve having PD. ("It is so unfair"). You may as well be howling at the moon.