Are the 3/5ths of Americans who are not obese actually living a healthy lifestyle? Or are they just living a different unhealthy lifestyle?

Is a skinny homeless methhead with a great BMI healthy? Or the blue collar dude who has terrible blood pressure from chain smoking and pounding energy drinks on his way to the job site?

How many Americans who are not obese are on their way to becoming obese?

There are lots of paths to unhealthiness and overeating / eating poorly is only one of them