I haven't ridden since ... Thursday. Was going to ride in today but eh. I've got a (slightly longer) trip across town after work, I'll ride that.

I have no idea what A-fib is.

I'm sure my heart is getting stronger; I just find it weird that I'd have ... cardiac abnormalities ... a few months after I started with cardiac-demanding exercise. I mean the first day, yeah ... I went from sedentary to 8 miles each way, and when I got to work I was ungodly exhausted (I could not walk, my legs refused to move much... stairs were no go, it wasn't happening) and my heart (or the area of my chest around it) felt like a brick, like an overworked muscle that's cramping. The ride home was, interestingly, much easier than the ride to work (hey, I adapt fast).

As much as I complain that I didn't ride this day or that for whatever reason, I do that 3 days a week and without feeling like my heart is going to blow a valve; my heart is definitely stronger than it was back then, I should not be having problems.