I have the problem.
I will wake up and my heart will be beating at 150 bpm or higher.
It is hard to fall asleep and easy to wake up, because I usually have palpitations and other symptoms.
Looks like I'm the first to respond to your pole.
Given I do not suffer from the problem I responded because I am a candidate. I suffer from AFib, full-time, and am currently using only "rate control" and anticoagulant.
My HR right now is between the mid 70s and 80s, as I said AFib. I take 100 mg of Metoprolol in the morning. Without the beta blocker I'd likely be running about 130 and up/down variations. Again, because of AFib.
I do not find the high HR a problem, but the inefficiency, I believe due to AFib, of my heart does make me tire easily when I am physically active. Walking and biking are not the joy they used to be..and forget any more running.
Hope this isn't too far off topic, and my sympathy to your frustration...try to focus on something you enjoy or that challenges you mind, that may help...as should exercise while engaging in mental distractions...sometimes I just day-dream, sometimes I try to solve math/algebra problems in my head while walking or biking...hope I don't crash : >)