FWIW, I've worked with numerous "high-level developers" who were quite fit. Not all of them had 19" biceps like this guy, but they were all pretty athletic. I'm talking a former pro cyclists, a jujitsu coach, someone who competed Iron Man competitions well into his 50s, an ultra marathon runner, a parkour gym owner, a pro tag player (yes this is a thing), a competitive TKD sparrer, plus lots of people who work out everyday just to be healthy. My last job had a team "strong man" board where people would post up their bench/deadlift/squat numbers.

It's pretty common for great developers to have interests outside of computers.