The Principles of Periodization - The Secret Running Tip to Peak Performance
Periodization (planning your training in blocks that each have a different goal, instead of repeating the same week all year) is how you peak for the right race at the right time. Below: how to cut your programme into blocks, what you can learn from the way elite runners structure their year, which runs really count and which don't, and which type of running matters most for your race distance.Most runners do the same-old training all year round, then wonder why they stall. Apply these principles and you can outrun people who are, on paper, faster than you. Start with the blocks.
Running Tip #1: Cut Your Running Programme Into Blocks
Here's the core idea: you cut your running programme into different blocks, and in each block you devote your attention to specific types of running. You do this to prepare yourself properly for your goal race.
Different coaches approach these blocks — these running training phases — differently, and use different names for them. But it all pretty much comes down to the same thing. In general, I'd identify the following blocks:

It's also important to recharge every now and then. Take a short break from running, come back fresh, and you'll be ready to roar again.
Running Tip #2: Learn from the Big Boys
Pick up any serious running training book and it will inevitably spend a lot of time on periodization. That tells you everything you need to know about how important it is.
A great general training book — Daniels' Running Formula — explains periodization very well. Daniels tells you exactly how long each phase should be, depending on how many weeks you have before your race.
Per race distance, he tells you precisely what you should be doing. He identifies the following phases:
As you can see, this is not too dissimilar from the running training blocks I identified above.
Running Tip #3: Make Each Run Count - Or Not?
Here's where a lot of runners go wrong — and I'd encourage you to be honest with yourself about this. The tendency is to make every single run count. To go hell for leather, every time you lace up.
Why is that a problem?
A sensible training schedule alternates hard and easy days. A hard day is a quality workout — a tempo session, an interval session, a long run. An easy day is a rest day, a recovery run, or cross-training.
The thing is, if you're running every day without genuinely applying the concept of recovery runs, your easy days become semi-hard days.
And the knock-on effect is that your hard workouts suffer too. Because you haven't fully recovered, your hard session isn't as fast or as long as it should be.
You end up doing semi-hard after semi-hard after semi-hard — and that leads to sub-optimal performance across the board.
Knowing when to rest and when to go for it — that's one of the hardest parts of running training. But it matters enormously.

Running Tip #4: Know Which Type of Running Matters Most for Your Race
The tricky part — and this is where your periodization plan really takes shape — is working out what matters most in each block.
That depends heavily on the race you're training for.
If you're preparing for a marathon, your focus will be more on longer, slower runs. If you're preparing for a 5k, intervals become far more important.
That doesn't mean you skip intervals entirely when marathon training. And it doesn't mean you abandon long runs when you're building for a 5k.
But your programme will look and feel significantly different — and it should.
Periodization is key to running your absolute best. It's not about running hard, or running as much as possible. The trick is smart scheduling — putting the right type of workouts in the right phase of your race preparation. Do that, and you'll be surprised what you're capable of.
Need help putting a world-class running programme together? Check out my coaching service. I'd be delighted to start working with you!
Some Other Pages You May Like
Hadd's Approach to Distance Training
Base to Speed Training: A Transition Checklist
Can't Run Past Two Miles? How to Build Endurance to Go Further
How Long Should Your Base Phase Be?
8-Week Speed Training Mesocycle
Strength & Cross-Training Volume by Phase
Eight Running Workouts
Marathon Training Tips
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About the author
Dominique de Rooij (Dom)
Advanced Running Coach certified by Athletics Australia with 20 years of writing about running and over a decade coaching runners, from first races to marathons. Dom created PlanMyRace, a training plan generator for any race from 1500m to the marathon. Now over 50, Dom still loves trail running, parkrun, and the coffee after.
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