Soft

"But the harsh fact of the matter is that there is also an increasingly large number of young Americans who are neglecting their bodies—whose physical fitness is not what it should be—who are getting soft. And such softness on the part of individual citizens can help to strip and destroy the vitality of a nation. For the physical vigor of our citizens is one of America's most precious resources. If we waste and neglect this resource, if we allow it to dwindle and grow soft then we will destroy much of our ability to meet the great and vital challenges which confront our people. We will be unable to realize our full potential as a nation."
--John F. Kennedy