How did most classic bodybuilders have or maintain slim waists

Slim Waist Workout Routine – Fitness Volt

What are the benefits of building a wide and thick waistline for bodybuilders? - Quora

What causes the distended waist on bodybuilders? - Quora

I've seen some bodybuilders build a wide looking waist. I don't want my waist to get wider than it already is. How can I avoid this? - Quora

The Smallest Waist in Bodybuilding

From Symmetry to Conditioning, Here Is What Bodybuilders Are

What happens to the bodies of bodybuilders when they get old? - Quora

Why do modern bodybuilders have big round ugly-looking belly? - Quora

How do bodybuilders maintain their body? - Quora

Proportions of a golden era bodybuilder : r/bodybuilding

Golden era vs modern open proportions : r/bodybuilding

Chris Bumstead Steroids Chris Bumstead's Workout, Bodybuilders

How to maintain bodybuilding - Quora

See the Dramatic Changes In Bodybuilders' Physiques Over the Past