what no one tells you about running

What No One Tells You About Your First 10K.

After 10 weeks of training, I survived my first 10K.
Not everything was rainbows and runner’s highs, but it was worth every step.
So… what would I do differently next time? Here’s the honest, slightly sweaty truth.

Yes, a good playlist matters, making time for running is hard but doable, and yes mindset, both physical and mental is everything
But here are three lessons I learned the hard way


🥖 Lesson 1: Fuel Like You’re Not Just Going for a Walk

There were days I ran after eating way too little, and I felt it.
When I wasn’t properly fueled, my energy dropped, my mood sank, and my body just said nope.

🧠 Science Insight: Fuel = Endurance

A 2023 study found that in long-distance races, nutrition intake during the run can significantly improve performance.
Specifically, each additional 100-calorie gel taken during a race allowed runners to run 0.5 to 0.7 km farther in the same time, with a 7.75% performance increase when taking five gels versus none.

This means your body is burning fuel, if you don’t have energy there is no pace. 

Lesson learned: You need to feed the engine.


💧 Lesson 2: Water, Magnesium, and the Basics We Ignore

Sounds boring, but staying hydrated and taking my vitamins (especially magnesium) made a real difference.
When I forgot, my legs cramped, and recovery took longer.

Lesson learned: water is not optional. Neither is recovery.


🐢 Lesson 3: To Run Fast, You Have to Train Slow

This was one of the most surprising takeaways from my training plan.
Some days felt too slow, like I wasn’t pushing enough. But on race day, I saw the results: I didn’t burn out early, and I kept my pace steady.

Slower training builds aerobic endurance  which is the foundation for running longer and stronger.

Lesson learned: Trust the process.


🩹 Updated Lesson 4: Running Hurts (In Weird Places)

Let’s be honest: running hurts, and I’m not talking about being tired.

At kilometer 6, my feet started bleeding. Yes, bleeding.
Turns out your shoes matter (a lot), purple toenails are no joke (but I kept mine!), and the burning sensation from clothes rubbing against your skin?
Let’s just say I now understand why running stores sell anti-chafing creams. They’re not upselling, they’re saving lives!

Lesson learned: Choose your shoes. Protect your skin. Respect the chafe.


🚀 What’s Next?

Now that I’ve crossed my 10K finish line, what’s next?  A half marathon? Another 10K? Or… early retirement?

Honestly, I really like running now, but for now I will just do it for fun.
Maybe by the end of the year I’ll train for a faster 10K (we will see).

The most important lesson overall is that running in your 30s doesn’t have to be fast, flawless, or fancy. It just needs to be yours.

👉 Thinking about starting to run? Or already on your journey?
What’s one thing you’d do differently — or recommend to someone new? Drop it in the comments 🏃‍♀️💬

💬 Want more behind-the-scenes from the journey?
Follow me on Instagram @TheRunningChapter  for real moments, playlist inspo, and new running updates.

 

👉Missed the last blogs? Find Them here:

 

The Running Chapter

Hey there! I’m Juliana García, 31yo, and I recently moved to Switzerland to pursue my master’s degree. Between adapting to a new country, balancing studies, and figuring out life here, I’ve somehow decided running was a good idea! But how does running fit into a busy life? Is being hungry all the time normal? And seriously- what am I supposed to think about for an entire hour while running? More than just a fitness challenge, this is also a journey to connect with people, explore Switzerland, and see if I can survive a 10K without regretting all my life choices. So, if you’ve ever wondered whether it’s too late to start running—or just need a partner in crime for the struggle—let’s do this together!

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