A trend goes viral not because it's already everyone's reality —
but precisely because it isn't.
How are people in their teens and twenties drinking, smoking, and exercising these days? Is it different from when I was that age — born in the nineties?
The media seems to have a clear answer. The "sober curious" movement is surging. The "today's workout complete" culture is everywhere. Running crews are taking over city streets. Gen Z, we're told, is the generation that puts health first.
"But when I opened the data, it told the exact opposite story."
The Korea Disease Control and Prevention Agency's National Health and Nutrition Survey (2023), the Youth Health Behavior Survey (2024), and the Obesity Fact Sheet (2025) — the numbers had nothing to say that matched the trend headlines.
A trend is not a mirror of reality. It is reality's shadow. The moment something gets called a "trend," it is already a confession that most people aren't living it.
| Indicator | Figure | Change |
|---|---|---|
| Obesity rate, adults in their 20s | 32.0% | 22.7% → 32.0% (over 10 years) |
| Obesity rate, men in their 20s | 43.9% | Nearly half are obese |
| Obesity rate, women in their 20s | 22.1% | 18.2% → 22.1% (+3.9%p in a single year) |
| Indicator | Figure | Change |
|---|---|---|
| High-risk drinking rate, men in their 20s | 15.4% | Actually higher than a decade ago |
| High-risk drinking rate, women in their 20s | 10.3% | The exact opposite of the "sober curious" trend |
Source: KDCA National Health and Nutrition Survey 2023, Obesity Fact Sheet 2025
| Indicator | Figure | Change |
|---|---|---|
| Smoking rate, men in their 20s | 28.8% | 34.8% → 28.8% (declining) |
| Smoking rate, women in their 20s | 12.1% | 8.9% → 12.1% (+3.2%p increase) |
| Smoking & drinking rate, teenagers | Declining | The only improving group (policy effect) |
"Over the past decade, people in their twenties have deteriorated across every dimension — physical activity, diet, alcohol consumption, and obesity."
— Korea Disease Control and Prevention Agency, official release
While articles poured out about running crews taking over cities, the actual physical health indicators for people in their twenties were deteriorating across the board. Trend and reality were pointing in exactly opposite directions.
Korea's fitness market is worth roughly 600 billion won; the health supplement market, roughly 6 trillion won. For these industries to make money, they need one message: "You are not healthy right now — buy this and you will be."
The real audience for "sober curious" and "today's workout complete" trend articles isn't the reader. It's the advertiser.
"Obesity rates rising among people in their 20s" — that runs once and disappears.
"Gen Z's sober curious revolution!" — that's a new article every week, plenty of people to interview, photogenic content, and ad revenue to boot. The glamorous minority gets the spotlight; the majority ordering takeout on the couch never becomes content.
When you work out, you post a proof shot. When you don't, you post nothing. What's easier to recall feels more prevalent — this is availability bias.
"Seems like everyone is exercising" — that's the illusion. In reality, the people who aren't vastly outnumber those who are.
Reality gets worse → longing for an ideal grows → you consume that longing as content → it ends with "I'll do it someday." Actual behavior never changes.
While "slow aging" YouTube videos accumulated 100 million views, the actual obesity rate among people in their twenties climbed from 22.7% to 32%.
Once upon a time, exercising was simply part of ordinary daily life. Now we live in an era where finishing a workout has become an achievement.
The fact that "completed today's workout" is worth bragging about is proof that not exercising has become the default. It would have been as absurd to the previous generation as posting "Ate food today — complete!"
A trend is not a mirror of reality — it is reality's shadow.
Flip "the opposite of reality is trend" around and you have a powerful tool. A trend lets you read reality in reverse.
Of the hundred people consuming a trend, maybe one or two actually execute it.
Simply shifting from consuming a trend to executing it makes you rare. While everyone watches health content, just work out. While everyone talks about AI, just use it.