I got the time of the pool opening wrong; so I hiked and did non-banded PT exercises.
Short hike:

No, it never quite felt right, but it wasn’t as if it got progressively worse. I did have to stretch a few times; forward bends helped. The trail: sort of an easy FPNC caliber trail; kind of nice and empty.
Then the 50 meter pool. Well, only 2 lanes for lap swimming due to a class.
500 meters in 12:52 (OMG)
400 meters of kicking, swim with fins
500 meters in 11:44
100 side.
That was enough for today.
Shoulder: a little bit sore, but gentle swimming seems easier than intervals.