I was around 240# in high school and lifted weights 10 hours per week. I lost some weight after graduating and then lost a lot, around 55 pounds in 6 months, due to being broke. @175, all my ribs were visible and my mother was shocked when I went to visit. My father told me how stupid I was, (I already knew). They didn't know why and I didn't tell them.
Eventually got a better job and could buy all the beer and food I wanted and went up close to 260#.

I'm 6'2" with a big frame.

I was tested @13% body fat @ 220#