A lot.
First and foremost, what your body looks like reveals your eating and consumption habits. This might also be indicative of your work, your social class, and also, the degree of personal freedom you got, or your own personal values.
The funny thing is that there is certainly some sort of variety here; for example, I know that a lot of poor immigrants tend to be on the obese side. And also, a lot of working middle-class people also tend to be obese. Or over fat.
Construction workers
At the old LA fitness gym I used to go in Providence Rhode Island, I’ve actually noted that a lot of the fit guys are construction workers. Why? Their work is seasonal and intermittent, which means that they have a lot more free time to just go to the gym work out and hang out.
It seems that a lot of modern day office slaves tend to have poor physiology, eating habits and exercise habits. Even the average tech worker, they tend to be skinny, emaciated and weak looking. Also lacking melanin in their skin.