Still swimming, and now with the physio's permission, on two sessions per week. This week I've passed a threshold as I was one length over 2500m.Currently I'm doing a warm up and then a long set of 2 easy lengths followed by a harder one, until tired. A decent 800m today in a little over 20 minutes.
I finished with lengths of bilateral breathing alternated with lazy breaststroke but they were slow today (that is not under 45 seconds each). A build up of fatigue I suppose.
Importantly I'm doing more, pushing a combination of speed and endurance and my arms seem to be coping. Don't over do it!