During the 60s, H.S. and grade schools that I went to had very tough P.E. classes. I don't recall any of my classmates being obese. Once we finished H.S., any one of us would have been physically fit and prepared for basic training/active duty - which is what basically happened during the Vietnam Era draft. We didn't abuse sweets and we seldom drank soft drinks. And if you needed money, you had to work to earn it. We might visit a fast food restaurant no more than once a week to once a month. And though times have changed, ironically, life back then was less monetarily complicated for our youth than it is now.