There are a large number of people who have terrible fitness and are 50+ pounds overweight. Many people smoke. I don't have numbers on the correlation with soci

There are a large number of people who have terrible fitness and are 50+ pounds overweight. Many people smoke. I don't have numbers on the correlation with socioeconomic status, but I'm pretty sure that worse fitness and smoking correlate with lower status to a degree (can't recall the news articles on such things, I've read occasional notes on such things). That's borne out by my personal observation. So basically, if you take the intersection of "bad habits" and "physical work", you wind up with "worse body" as a result. On the other hand, careful maintenance of your body & health habits allows you to do better than your unmaintained colleague. It's hard, but doable.