In a small, picturesque village, a couple was widely admired for their astonishing vitality. The husband, an impressive 102 years old, and his wife, a sprightly 98, were both in remarkable health. They worked tirelessly on their farm every day, their youthful energy defying their years.

One afternoon, a curious visitor arrived at the farm, eager to learn the secret behind their longevity. He found the old man chopping wood, shirtless, his sweat-covered physique looking decades younger than his age.

Introducing himself, the visitor exclaimed, “I hear you’re 102 years old!”

“That’s right,” the old man replied with a warm smile.

“Incredible! You look amazing!” the visitor marveled.

“Thank you,” said the old man modestly.

“Do you mind if I ask—”

“How I’ve stayed so healthy at this age?” the old man interjected knowingly. “Help me carry this wood to the house, and I’ll tell you.”

The visitor eagerly agreed, and together they hauled the wood inside. Once they were settled, the old man began to share his story.

“You see,” he said, “I’ve been married for 75 years. Early on in our marriage, the wife and I made a little agreement. Whenever we had an argument, the one who lost would have to run 5 kilometers.”

He chuckled before continuing, “We’ve had a pretty typical marriage, so I’ve been running 5 kilometers almost every day for the past 75 years. That’s why I’m in such good shape.”

The visitor, still puzzled, asked, “But if that’s the case, how is your wife in such great shape too?”

The old man grinned mischievously. “Oh, that’s simple. She usually runs after me to make sure I finish the whole five!”