They had the vigor and alertness of country people who have spent all their lives in the open and troubled their heads very little with dull things in books.
This was a section that knew the chill of winter, as well as the heat of summer, and there was a vigor and energy in the people that was strange to her.
"Sentimental nonsense!" snorted Mrs. Merriwether with vigor.
Scarlett was surprised, too, at the vigor of Melanie’s attack, for she knew Melanie considered her husband beyond wifely reproaches and thought his decisions second only to God’s.
The healthy vigor which had carried her through the hard days at Tara stood her in good stead now, and within two weeks of Ella Lorena’s birth she was strong enough to sit up and chafe at her inactivity.
There are no more uses of "vigor" in the book.
Show samples from other sources
And we ourselves assembled here today, who are still most of us in the vigor of life, have carried the work of improvement further, and have richly endowed our city with all things, so that she is sufficient for herself both in peace and war.
Thucydides -- Pericles’s Funeral Oration
A group of loudmouthed white-haired old ladies, each trying to talk over the next, a few of them texting, the kind of elderly people who have a baffling amount of energy, so much youthful vigor you had to wonder if they were trying to rub it in.