I was 6 ft 1 195 pounds when I graduated college. That put my BMI at 25.6. I was also a swimmer who worked out basically 3 to 4 hours every day and had a body fat percentage of 4 to 5%. No way could I get back to that standard.
The funny part is if you calculate my BMI at the time, I was well within the normal range by modern standards.
But at the saner time in American history, I looked like an emaciated beanpole and there was a genuine concern that I had a parasite or something because there was zero problem with my appetite (still isn't, unfortunately) and my fat percentage was probably near 0% with just a typical lifestyle (moderate exercise, sports and walking).