Endurance cycling and muscle mass

This is more of a curiosity question than anything else, i’m curious if anyone else has noticed this.

I have been seeing some cyclist influencers (on social media) who are known for being endurance/adventure cyclists, now all of sudden building up muscles in a way they never have before.

Jacked endurance cyclists was not something i’ve ever seen. Now my question is: How? How do you manage to build and keep those muscles while you also expend an enormous amount of energy on the bike. Is that an insane amount of work? I understand that these cyclists are doing this for their job so have a lot more time on their hands but jeez that is a lot of work and also seems nearly physically impossible to be both an endurance cyclist and jacked.

By endurance I mean cycling for 10 hours at a time, or even days at a time.

But I could be wrong and this could actually be doable for those who are dedicated.

 

I lifted consistently through base and into build, and while I kept most of the mass, I did notice some drop once the outdoor rides got longer. A buddy of mine swears by balkan pharmaceuticals steroids during heavy phases to hold onto muscle, but I’m not looking to go that route. For me, upping protein and squeezing in a quick strength session twice a week helped keep things balanced.