I'm not sure how well today's swim went. I thought the first 200m warm-up went well at 62SPM but no data. It seems that the failing watch battery led to a corrupt file. I then did some sets at 63SPM with bilateral breathing but found that I was running out of breath by 6 lengths. I tried faster and slower cadence and much the same. It did feel successful to do a sort of 2-3-1 system to keep some symmetry and reduce the time between breaths but perhaps more complex than needed.
Just before stopping I tired a 'powerful' set with RHS only breathing but trying to push with my arms as much as possible. Don't know how the pace was!
Oh well, at least I was in the water for half an hour or so.
Back home I changed the battery but couldn't retrieve the file...