@adamwolf You pretty much describe what I have been doing so far. I also thought about this a lot. Here’s what I have arrived at:
- Would your doctor give you a sick note? Recovery is important. Don’t drag yourself through your goals if they conflict with this. If your doctor (would have) ordered rest then do so.
- What’s the spirit of your goal? Did you create it with the intent of simply not procrastinating the specific thing it’s about? Being sick is hardly procrastinating in my book. Also: I need a second opinion on legitness.
- If it’s a tiny thing to do (like a 7 min workout or tidying up the kitchen right quick) I’ll do it regardless though maybe a bit more lenient (in case of the workout).
- Lastly (and I am conflicted about this one): If it’s about tracking hours I put into something I ask myself how much quality work would I get done if I forced myself to do it. Or if I’d be better off getting some rest instead. Again, this one is not so easy. Sometimes there’s some easy thing to do that indirectly benefits the goal and can still be done despite being sick.
Maybe this is of some help 
Also kudos for surfacing this question! I find it super insightful to talk about these things.