Active duty Air Force here. I'm in aircraft maintenance and there are a few fats here and there, but it's a pretty physical job so most of them are either in some sort of position where they are riding a desk all day or just exceptionally lazy. There's really nothing we can do about them if they are passing their PT tests whether legitimately (very rare) or by obtaining a waiver from the doc for an exemption of one or more parts of the test (99% of the time). The test is a 1.5 mile run, 1 min timed push-ups, 1 min timed sit-ups, and a waist measurement. Unless they are stacking up PT failures, and even then they usually have to fail at least 4 within a 2 year period to get kicked out, nothing can be done about them other than looking at them like the disgusting disgraces to the uniform that they are.