I got super into biking recently, having gotten back on my bike at the beginning of last season, starting out struggling to make it the quarter mile around the block (about half of which is uphill of course) and ended my first season with an 8 mile record. This season I'm already up to 12 miles as my furthest ride without a break (just yesterday I did 10 miles which included climbing over 250 feet of elevation)
Anyways point is, I decided last second to do a 5k on the 4 of July and upon returning home I told my neighbor who was outside about it. And he's fucking ripped with a 6 pack and he gave an awkward smile and said "I don't think I could even finish that" and it was really crazy reminder of how much some folks focus on strength and entirely ignore cardio