Good re-use of meditation muscles. 1) If you're thinking about something else, you're off-task, and 2) breath as both focus mechanism and useful action.
I trained long and hard as a swimmer, so I'm used to the individual push-through. My problem is showing up or getting down to business. I find that it's a framing problem: you aren't there to get better, you're there to face your pain and defeat it.
"Getting better" or whatnot is a distant thing while you're at the grind. Lofty goals are pale and distant compared to the immediate, visceral pain you're experiencing. That's what you have to defeat, so that'd better be why you're there.
It's the old strategy/tactics divide all over again. Taking the beach sounds good back at command, but it's a different mind to show up and take the pill box without hesitation.