I was thinking about just this yesterday (although not just in the context of cycling, more wider fitness).
I’d like to do the C2C over 3 days in the next couple of years, solo and carrying all I need (B&Bs though, not camping which just isn’t for me).
I want to clear the Loughrigg Terrace climb with no stopping for breathers, photos, in case someone needs the gate holding open that I can’t see, etc.
I have a load of getting faster goals too, sub 10 minutes on a climb near me, knock 5 minutes off my Cragg Vale time and the like.
Out of cycling I want to get a 200kg deadlift back and be able to do a single solitary hanging pull up. The latter will involve more losing weight than getting stronger.