There are plenty of jobs that are physical, yes, involving moving your body (postman is one that comes to mind) but they tend to pay less. And offer fewer benefits. Postman is a job that does pay well and does offer benefits. However, I see that in my community, they are looking for postmen (and women) who can work part-time. I'm guessing those might be temporary job in addition to being part-time. All this does is cut benefits but it fills the need for mail to be delivered!
If you want to make more money and you want benefits (in particular, health care), either get an job where you spend most of your time in an office or teach. Teachers tend to stand, pace and walk around the building during the day.
Even a traveling salesman spends most of his time sitting while traveling (in plane or car).