my epic cycling journey

For the last couple of years I’ve felt like I was ‘almost 50’. Today I turn 48, and I realize I’m still Two Full Years away from 50. It’s like stepping into a time machine. I’m not quite in the best shape of my life, but I’m getting there.
High school still wins, & for a couple of years in my early 30’s I was a gym rat (stair master/aerobic classes). Endurance has been easy enough to build, but still struggling with cardio. Trying to do more hills to work on this.