As a society, America is getting fatter (your humble host as well!). That poses a real challenge for the services, as the standards of service haven’t changed. There’s only so many people to recruit from in America, and having a significant portion render themselves outside the pool of qualified applicants makes maintaining and growing the Army that much tougher.
This isn’t a problem that has suddenly appeared, either. We certainly faced it ten years ago when I was recruiting. Very often I would have potential recruits who were motivated to join, but just couldn’t pass the height/weight portion of the physical. We would work with them as best we could to slim them down, but our resources were limited, and the applicants often had limited time to devote to improving their physical shape.
In light of this, the Army is considering a “Fat Camp” for those recruits who are otherwise fully qualified to serve, but need to improve their weight and their physical conditioning. Many on active duty will bemoan this as further softening of the standards, but if the new recruits can get in, slim down, and meet the physical standards, I think it will be worth it.