Have you ever finished a workout and not really understood why it went badly (or surprisingly well)? Have you ever wondered if that feeling of fatigue was related to sleep, nutrition, stress, or just a bad day?
The truth is, the mind forgets quickly, but paper (or a digital file) doesn’t.
Keeping a training journal is one of the simplest and most powerful tools to become more aware of how you train, what works, and what takes you further away from your goals. You don’t need to write a novel; a few lines a day are enough, but with consistency.
Why Does Writing Help You Run Better?
Writing is an action that provides clarity and makes you more self-aware. I’m not just talking about task lists (which are also fundamental), but truly about making notes to understand yourself. Putting your feelings, actions, and desires down on paper helps you see more clearly what’s worth keeping and what you can let go of.
Training isn’t just “going for a run”; it’s a process made of choices, attempts, mistakes, and improvements. Writing these things down helps you organize your feelings, data, and goals.
When you’re running or working out, you are in the action. You feel like you notice everything: your breath, the fatigue, your pace, but as soon as you finish, that feeling often fades. You’re just left with judgments: “it went well” or “I didn’t push hard enough.” But why did it go that way?
The journal forces you to stop for a moment and take stock, to observe and ask yourself:
HOW DID I FEEL BEFORE I STARTED? HOW WAS IT DURING? WHAT WORKED AND WHAT DIDN’T?
Over time, connections start to emerge among those lines. You’ll notice that maybe you sleep poorly every time you work out late, that your quality sessions go better in the morning, that certain foods weigh you down and certain playlists empower you.
How Do You Start?
The best way to begin is not to wait for a perfect format. When you jot down a couple of lines about how your workout went, you’re already doing something very important: you’re observing yourself from the outside, and it’s precisely from this perspective that the best insights come.
A little extra tip? Write by hand.
Not for romanticism, but because manual writing activates neurological processes related to memory and understanding. In a way, it strengthens the connection between what you feel and what you do.
You don’t need anything complicated: you can start by simply noting kilometers and feelings, and then, over time, you can add other useful elements:
Session goal (long, recovery, quality…) How you felt before/during/after Hours of sleep, pre-workout nutrition Weather, surface, any recurring discomforts or thoughts Perceived exertion (e.g., scale from 1 to 10) Level of concentration/effort Free notes
Write however it comes to you; use adjectives, draw emojis, invent your own personal rating scale. The important thing is that it makes sense to you.
Write Down Goals, Not Just Workouts
The journal is also the perfect place to focus on your goals. At the beginning of a season, a training plan, or even just a new month, you can stop and write down:
Primary goals: the race or races you want to be ready for Secondary goals: the practical improvements you need to achieve them (more mileage, more consistency, better technique, more strength.)
From there, you can reflect each week on what you’re doing to get closer to those goals. You can build a small plan and, day after day, return to the journal to stay on track. You’ll be surprised to discover how motivating it can be to reread the words you wrote during weeks when you felt you hadn’t done enough.
Your Own Personal KPI
In the business world, KPIs (Key Performance Indicators) are used to measure results.
A training journal, at its core, is exactly this: a key performance indicator, but a personal, flexible, and human one. It doesn’t judge you or give you a grade; it shows you the path, helps you see how you’re growing and where you can improve.
Over time, the journal becomes a kind of mirror: it doesn’t judge, it reflects. It helps you identify key moments, signals not to be underestimated, and habits that benefit you. And when things get tough, flipping through it can remind you how much you’ve already grown.
What about you? Have you ever kept a training journal? If so, what form does it take? If not, would you like to try?