Back on the Bike!
Back in the day, I used to ride my bike a lot. Like, every other weekend I'd be off on a 60, 80, or even 100km ride (my personal maximum). But after having a kid and getting busy with other projects, my bike riding took a back seat, and I only tended to get out once every six weeks or so. It's amazing how quickly your stamina drops off, because these days, I can barely manage to get up to 40k without wanting to pack it in. Granted, this is based on recent rides during the punishing summer heat, but still - my legs ain't what they used to be.