I suffered from this for quite a while and finally found a Parkinson's article. A rest or nap without sleep does not help.
The comment was our body needs to recharge and at least a 1 hour sleep nap midday does this more effectively. Depending on my day I will sleep for one hour between 2 and 4 pm.
I was amazed when the body would let me sleep as truly needed. The vast majority of days it is 1hour 15 minutes, but there are longer naps as the body needs it sometimes as long as 3 hours.
This did not solve it after one day, Slowly changing my daily pattern to include a one hour nap after two weeks I noticed a change. My body decided how much sleep I needed not I. The naps no longer were everyday one hour but ranged from from 1 to 3 hours. The body decided what it needed.

Yes I had to darken the room, put soft music on and sleep on top of the covers.

Good luck to all and may today be better than yesterday if only by an inch.

I get b12 shots monthly always low. See dr every 30 days have lab work. Amazing what they find with it. Diabetes etc it’s u against u fight to stay healthy and safe. Low b12 is not good

I’m going to ask my dr to test my b12 in my next blood workup

I started taking vitamin B12 when I wake in the morning and have energy most of the day

My little experiment didn’t work. I am now very weak now. Parkinson’s has won again. I did notice more off times and an increase to stay in the bed. The only difference I discovered is that coffee is my new best friend, now my over all body has increased weakness and my center of gravity is worse. We shouldn’t try to go backwards with Parkinson’s. Happy thoughts to everyone…Gordon