This New York Times graphic discusses a scan of six different men, all of whom were 5 feet 9 inches tall and 172 pounds. Their body shapes were very different. I think the focus on BMI taken in the article is a mistake. For years, knowledgeable people have understood that BMI is nothing but a rough guide that assesses populations and that body fat and muscle percentage are more important. It shouldn't have been a surprise that the BMI wasn't that helpful.
"How is it possible that the same B.M.I. can look so different? The simple explanation is that muscle and bone are denser than fat and some people carry more or less weight in their torso or legs."