Check out that resting heart rate, yo.
And people say walking isn’t good cardio. It is if you walk fast enough and long enough.
(Yes, I know fitness tracker-based heart monitors aren’t the most accurate, but I suspect it’s accurate within a range. And I actually did calculate it the “manual” way (taking my pulse) a little bit after I took this picture (after my heart rate had calmed down a little; I’d just gone up the stairs) and it was 49, so.