I worked in manual labor for 6 years to get myself through college. What is your experience?

Besides, just seek out the data instead of spouting glib anecdotes

As someone from the USA who really only sees road crews from time to time, is the prevalence of obesity in construction really that high? What kinds of construction. I imagine you couldn't replace residential roofs if you were too large, forever if your job consisted of mostly ground based walking tasks like... I have no idea. But maybe some types of construction have more obese than others.

I haven't known many workers in that trade but all my experience is with thin and deceptively strong men who look permanently beat up from years of labor and small accumulated accidents.