11.   There is a strained youthful vigor to the area, a palpable sense that the cow town has evolved into regional capital.

12.   This is where George Banks, panicked at the onset of grandfatherhood, seduces Nina on the floor by the dishwasher to prove his youthful vigor.

13.   All those memories can still be revisited, and while I have aged, the city has regained its youthful vigor.

14.   Injecting new genes into aging muscles can restore youthful vigor and strength, according to a laboratory study of mice.