Will ask Dr next visit. But CK not an issue with reduced intensity&duration. I just mostly buy-in to the slow-it-down-a-little-bit (if you want to enjoy it for many more years) theory. Sorta like - speed is not my friend, no crashes on the slopes, keep the rubber side down, backpacks less than 35lbs - if the dream is to kayak with the orcas.
As to the full work-up = presently on 2nd neurological work-up with new neurologist. Rheumatology was within limits. At least I pass basic health indicators with no meds and get outside daily.