"He was always frail back then, but now he is easily the healthiest among us." That was the collective realization at a recent reunion of 93-year-old classmates. The observation captured a striking reversal: the individual who struggled most with poor health during his school years has achieved the longest health span—the period of life spent in good health—among his entire peer group.
While classmates recalled a boy who constantly succumbed to minor illnesses, they found a man aging in robust, enviable condition. As one attendee noted, "All the friends who were so confident about their health when they were young have already passed away." The poignant exchange offers a powerful lesson on longevity and wellness.
Intellectual Vitality and the Power of Absolute Moderation
The 93-year-old singled out by his peers showed none of the typical markers of advanced age: he uses no dentures, requires no hearing aids, walks without a cane, and maintains a perfectly straight posture. Remarkably, he also recently published an academic volume referencing both Eastern and Western literature. He continues to write every day, maintains a lifelong daily diary, and occasionally delivers public lectures on extending one's health span.
When asked about his secret, he stated plainly that he simply never overdid anything. Longevity does not run in his family; both of his parents passed away before the age of 60. Because of his frail constitution since childhood, he grew up paying meticulous attention to his diet and physical limits. He drank alcohol only sparingly and never smoked. Knowing that overeating caused him discomfort for the rest of the day, he strictly controlled his portions. For exercise, he has focused almost exclusively on walking and swimming since turning 60. Moving his legs against the water's resistance, he noted, has kept his knee joints entirely free of pain well into his 90s.
Protecting Cognitive Function and a Parallel to a 106-Year-Old Philosopher
Preserving brain health was another deliberate choice. Having witnessed his family struggle through his grandmother's battle with dementia, he realized early on that physical health means very little if cognitive function declines. To counter this, he logs his daily life from morning until night in a memo-style diary. He records routine details—what he ate, the pocket money he gave his grandchild, where he walked—rather than focusing on elegant prose. Experts notes that remembering the day's schedule and the physical act of writing by hand are highly effective exercises for preserving cognitive function and preventing dementia.
While a single case cannot be generalized to everyone, this 93-year-old's routine shares striking parallels with the lifestyle of philosopher Kim Hyung-seok, who is currently 106 years old. Kim Hyung-seok similarly avoids overexertion and maintains rigorous intellectual activity. His physical routine also centers on joint-friendly exercises like swimming and walking. Every morning, Kim Hyung-seok consumes protein through eggs and dairy, replenishes vitamins with fresh fruits and vegetables, and walks up a sloped neighborhood road to preserve leg muscle strength.
The sudden passing of individuals who "never even caught a cold" frequently shocks loved ones, but middle-aged and older adults often compromise their health by overexerting themselves. Taking up intense marathons or grueling hikes later in life can overtax the cardiovascular system. Ultimately, physical and dietary moderation, paired with an enduring curiosity about the world and consistent mental activity, serve as the true foundation for a long, vibrant health span free of cognitive decline.
