Today was another big post-baby fitness milestone: the first spin class! I took a blogger class via Blog and Tweet Boston, opting for the spin one with Catie Macken. I’d taken Azure Campbell‘s Flybarre class with Jen and my sister the week before, and that kicked my butt just as much as it did when I tried it for the first time earlier this year (with pregnancy modifications). It was great to see familiar faces like Danielle, Jessie, and Elissa when heading into the studio. I chose a bike in the back–was really glad that they let us choose our bikes this time. Spin felt a lot better than I expected it to. It really is…