The majority of OSHA regulations out there are meant to protect people in the trades. Let's not romanticise things: white collar workers have it easy when it comes to toils on the body. If you get injured, you can probably take a few days off, work from home, heal properly.

In the trades, you pop some Ibuprofen and suck it up. Sit out injured too long and you're out of a job, unless you happen to win some workman's comp lottery.

In addition, lots of risks with sedentary behavior are preventable: eat well, take frequent breaks, go for a walk after dinner, etc.