Why I Went From Running to Marathon _My Body Endured, So I Started Enduring Life
“At the end of the day, running is running. So what makes a marathon any different?” That’s what I used to think.
Usually, running up to 10km is just “running,” 10–20km is “training toward a marathon,” and completing your first full marathon makes you a “beginner marathoner.” I’m somewhere around that level. But while preparing for a full marathon, I realized something: The difference between running and a marathon isn’t just the distance.
I. Starting to Run
In my early thirties, I barely took care of my health.
- Even brushing my skin lightly would cause redness,
- I felt exhausted no matter how much I slept on weekends,
- And colds lingered for more than two months.
So I decided to start exercising. I began by jogging around my kids’ schoolyard.
II. Running 3km
On winter nights, I used to “pretend to run” while circling a dark track. After about three weeks, the cold that bothered me every night completely disappeared.
I moved to the Anyang Stream trail and ran 3km a day, 5 days a week, for six months. Before I knew it, I had become someone who didn’t catch colds anymore.
III. Running 5km
During the rainy season, I used the weather as an excuse to skip running and signed up for a gym. The treadmill was boring, but eventually I worked my way up to running 5km. My pace slowly increased from 8–9 km/h to 10.
About a year after I started running, my skin improved, and the redness from tiny irritations disappeared.
IV. Running On and Off for 10 Years
Once my health returned, my “5 days a week” routine turned into 1–3 times a week. In summer it was too hot, in winter too cold—so I barely ran.
Still, after nearly 10 years of doing it on and off,
- 5km became my baseline, and I occasionally ran 7–10km,
- The old strong body odor almost disappeared,
- My skin improved even more,
- I rarely caught colds, and
- Most of my stress faded after a single run.
V. Beyond 10km
1. Increasing Distance
A friend encouraged me to join a marathon club, and I signed up for a 32km race. Training with the club pushed me past 20km on group runs. Soon, even when running alone, 10km became standard, and I sometimes ran 15–20km.
2. Changes
There were intensities I would have never attempted alone, but running with the club pushed my limits and built consistency. After about eight months, I could see real changes.
- I recovered better from drinking,
- I used to get tired after two hours of work—now I could work seven hours straight,
- I used to feel half-asleep if I didn’t get enough rest—now even 1–2 hours of sleep got me through the next day.
VI. Why I Turned Toward the Marathon
1. Growing Older
As I approached my fifties, I left my job. It was overwhelming.
“First, I need to rebuild my strength. If all else fails, at least my body will carry me.”
2. The First Time I Felt ‘Endurance Strength’
What I gained most while preparing for a marathon was the strength to endure.
- Your body moves when your mind needs it, giving you more productive hours,
- You can push through tasks you want to give up on,
- You track problems to the end instead of dropping them halfway,
- I used to snap at my family when tired—now I had the stamina not to.
3. Becoming an Adult
For people naturally strong and fit, this may sound obvious. But for someone like me, who used to be weak, every bit of improvement felt huge.
More than the sharp focus it gives, the most valuable part of fitness is “having enough strength not to collapse even when exhausted.”
Everyone has a different reason for moving from running to marathoning. But the health gained from running, and the stamina developed through marathon training, make a person more patient, a little more composed, and a little more mature.
Not just older— but truly grown.

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