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A modern way to train for the marathon

Marius Bakken, M.D. Olympic distance runner (2000, 2004)

Train Smarter.
Race Faster.

Marathon plans are everywhere. Apps generate them. But the 100-Day Marathon Plan is different. It uses Italian Periodization and Kenyan Intensity control to get you to the finish line faster – and healthier. Structured so it's easy to customize for any runner, regardless of age, gender, speed, or skill.

One-time payment • Lifetime access • All 8 goal plans included

“Marius Bakken has used his unique experience as a world-class runner to put together one of the most comprehensive marathon products I have seen.”
Jack Waitz, Coach to 9× NYC Marathon Winner, Grete Waitz
RB
MS
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★★★★★

Trusted by 4,600+ runners since 2009

100 Day Marathon Dashboard

Current Goal

Sub 3:30 Marathon

The Science

Why Generic Plans Fail

Most marathon plans just add miles and hope for the best. Or they give you one-size-fits-all schedules that leave you feeling anxious and unprepared on race day. The 100 Day Plan is built on two proven training methodologies – the same principles that produced Olympic medalists and world-class performances – adapted so any runner can use them. This is not theory. It comes from 5,500 lactate tests and two decades of Olympic-level experience.

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🇮🇹

Italian Periodization

When Stefano Baldini won the 2004 Olympic Marathon, it wasn't luck. The Italian coaches had developed a periodization system – a "negative taper" approach – that produced remarkably consistent performances at the highest level. I studied this system extensively and built it into the 100 Day Plan.

Instead of random weeks with no clear direction, the plan moves through 5 distinct training phases. You start with short, sharp 5K/10K work to build raw speed and neuromuscular capacity. Then you extend into half marathon pace efforts that develop your aerobic ceiling. Only after that foundation is in place do you move into marathon-specific work – long runs with pace segments, race simulations, and the final taper.

This step-by-step build from the 5K to the marathon is what separates this plan from programs that have you thinking about 26.2 miles from day one. You arrive at the marathon phase already fast and strong – not just "conditioned" from logging miles.

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🇰🇪

Kenyan Intensity

Most runners make the same mistake: they go too hard on their hard days, and too hard on their easy days. The result? Overtraining, injuries, and plateaus. The Kenyans avoid this by controlling intensity with precision – and so does this plan.

Every workout in the 100 Day Plan uses specific heart rate and pace targets. You never train harder than 10K pace. That sounds counterintuitive for a marathon plan, but it's exactly why runners on this program recover faster, stay injury-free, and keep getting stronger week after week instead of digging themselves into a hole they can't get out of.

The key is accumulating a large volume of quality work at controlled intensities – what I call "threshold running at Kenyan effort." The workouts change from week to week, so your body never adapts to a single stimulus. This approach, backed by over 5,500 lactate tests I've conducted throughout my career, builds the kind of deep endurance that shows up when it counts most: in the last 10 kilometers of the marathon.

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Trusted by Marathoners and Running Experts

"Marius Bakken has used his unique experience as a world-class runner to put together one of the most comprehensive marathon products I have seen. The 100-day Marathon Training program is covering all topics to improve as a runner. Marius experience and knowledge of modern training techniques will benefit runners, from the beginner to the experienced marathoner."
Jack Waitz
Husband of Grete Waitz, 9 time NYC marathon winner

A Complete Training System

This isn't a PDF you download and forget. It's a comprehensive platform with day-by-day guidance, video coaching, and smart tools.

Detailed Daily Programming

Every single day is mapped out. Distance, intensity, and purpose. No guessing.

Training Calendar

Smart Calculators

Input your stats, get your exact pacing and heart rate zones.

Pacing Calculator

Precision Guidance

Exact intervals and "Tips from Marius" for every key workout.

Interval Session Detail

Video Coaching Vault

I walk you through the system personally. 15 instructional videos.

Inside Look

How the 100 Days Break Down

A systematic progression where every week builds on the last.

Weeks 1-2

Introduction

Short, intense intervals (e.g., 45/15s) to wake up your neuromuscular system and prime you for faster running.

Weeks 3-6

Development

Building VO2 max (5K/10K focus) and then extending into longer threshold efforts (Half Marathon focus).

Weeks 7-13

Specifics

The Core. Long runs with marathon pace segments and extended threshold sessions. The phases converge here.

Weeks 14-15

Taper & Race

Reduced volume, maintained sharpness. You arrive at the start line fresh, not fried.

Performance Toolkit

Every tool you need to remove the guesswork

Train with absolute confidence using calculators, guides, and bonus materials included with the plan.

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Manual + Plan Flexibility

  • 120-page digital manual with the full method, session templates, and execution rules.
  • Flexibility Guide: adjust the plan to 60 to 150 days without losing structure.
  • Bonus materials that answer the practical "what if…" questions.
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Calculators

Quick, practical tools to personalize training and race execution.

  • Pace calculator for training and race splits.
  • Nutrition calculator to plan carbs and fluids by body size and intensity.
  • BMI calculator as a simple sanity-check metric (not a performance "score").
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Race + Resilience Guides

  • Race-day nutrition strategies (what, when, and how much).
  • Mental training techniques for pacing discipline and late-race focus.
  • Injury prevention protocols to keep training repeatable week to week.
  • Recovery optimization guide (sleep, easy days, and load management).

What Happens When It Works

Real results from real runners. Scroll for more →

★★★★★

"Marius Bakken has used his unique experience as a world-class runner to put together one of the most comprehensive marathon products I have seen. The 100-day Marathon Training program is covering all topics to improve as a runner. Marius experience and knowledge of modern training techniques will benefit runners, from the beginner to the experienced marathoner."

Jack Waitz
Husband/coach of Grete Waitz, 9 time NYC marathon winner
★★★★★

"Most marathon schedules are rigid. The 100 Day Marathon Plan deals with flexibility and gives runners options. I especially enjoyed the marathon race-day tips and how you combine the Italian and Kenyan schools of thought into one program. I like the use of Lydiard-like periodization with a build up from the 5K to the marathon itself. All types of runners would benefit from this type of marathon work. That's the best thing about this program: It's for everyone! It builds you up for the marathon, step-by-step instead of getting you to think about the marathon from day one. I've never seen anything like this before"

Duncan Larkin
Running Times Magazine writer and 2.32 marathon runner
★★★★★

"Hello Marius this is a letter of thanks to you. On Sunday in the London Marathon I set a new life time best running 2.47.34. I should point out to anyone reading this that I have been running for 17 years and Marathons for 11 years! I am now 49 years old and going by what many runners say should be slowing down, yet on your program I ran 3 mins 39 sec faster than last year and 1 min 18 sec faster than my old P.B. set way back in 2003 when I was only 42 years old! AMAZING!!! I felt stronger than ever before in the last 6 miles and overtook runner after runner in my charge for the line, infact I think only one runner went passed me in those last 6 miles! I have found your 100 day plan enjoyable and challenging, but at the same time because you never train harder than 10k pace I was able to recover quickly and not overtrain and dig myself into a whole I could not get out of! Also because your training plan changes from week to week I found my body kept getting stronger throughout the entire program! I had no injuries or illness, a very good sign that shows how sensible and clever your program is! I now intend to follow your training programme up to next years London marathon, where I believe I can continue to improve and run 2.45 or better at the age of 50! I'm happy to recommend your 100 day marathon plan to anybody who is serious about running faster, if I can do it then anyone can! Thanks again Marius, you have reversed the aging process for me:)"

Rick Bowker
Southport UK. PR at the Liverpool half marathon of 1.18 ' 2010 at the age of 49 (1 month later went on to run 2:47 in London)
★★★★★

"To illustrate what Marius' program did to my shape: During the 12 weeks of training towards New York Marathon I "tested" myself weekly on the SRM race (3.3k). The 10th of August at the start of the schedule: 12:39, the 7th of September: 12:13, the 12th of September 11:25 and the 12th of October 11:16. That means an improvement of 11%! On a marathon this is equal to almost 30 minutes improvement on only 12 weeks of training. On the starting line in New York my weight was reduced to 71 kg, 10 kg (20 pounds) lower than it was 12 weeks earlier. The feeling was amazing. Especially the feeling of being extremely strong the last 10 k. For a relatively untrained person just some months before to pass 250 runners (and only getting passed by 3) on the last 10 k and a finishing position of 517 out of 37 000 was an experience of a lifetime."

Martin Samdal
2:58:52 NYC Marathon 2005
★★★★★

"It is extremely well organized and informative. I almost feel compelled to run a marathon just to follow your program. Your knowledge on the subject is extremely evident in your writing. I love how you explain the combination of Italian and Kenyan Marathon Training Plans. I loved it. Very professional."

David Tiefenthaler
Coach and owner of tips4running.com
★★★★★

"I find the 100 day plan very useful. Especially the combination of a running schedule and tutorials of the basic training ideas and other elements which provides insights on how and why the schedule build up the way it is. I also like the emphasis on the flexibility of the schedule and on the positive tone throughout the plan. It really helps the newcomer to be confident that it is possible run a marathon without running mile after mile day after day. I of course like the 100 day plan because it most importantly provides results. Follow the plan and be sure to have the best possibilities to have a great run. Compared to other plans I have followed (Stockholm 21K program by Anders Szalkai) the 100 day plan isn't that complex with a lot of different elements in each training session. I have completed 6 half marathons and have a PB of 1:39. My long time goal is to qualify and run Boston marathon, which will require a marathon under 3:20. One of the best part of the 100-day plan was the FAQ part. This gave the opportunity to interact with a coach and other runners on different elements of the plan. This made some of the runs easier to understand and also provided with additional information from runners in the same training level and situation as yourself."

Geir Engen
NATO officer and 1:39 Half Marathon Runner
★★★★★

"Hi, Marius!! Remember me? If you don't, you can read all the previous posts from this conversation. I'm writing straight to you by email, because I didn't find that "statement palce" on your site anymore ;) I wrote you last September about my new PB 2:57:12. Now I have same kind of news for you :) About 3 weeks to go I ran at Copenhagen Marathon and my time was 2:51:16!!! So I'm getting faster and faster, thanks to you!! I kept 4:00/km pace to the 30-35km, but in the final 10k or so I had to slow down a bit, because my legs started to feel very heavy.. I think I'm going to run couple of fast-finish long runs to be better next time ;) Now, I have planned to run sub 2:50 in next October!! At Vantaa maraton 14th of October!! I also attach one picture from last the final straight!! Thanks for great plan!! I will continue 2:45 -plan.. -"

Mikko Jarvinen
From Finland
★★★★★

"I'm a 2:20 marathoner that had become very curious about the Italian Periodisation (negative taper) since Stephano Baldini won the 2004 Olympic Marathon. I immediately went searching for his approach. Quickly, I was mind-boggled by how much of a consistent performer he was. The Italians must have discovered a format for marathon success. For years I've studied but not until buying the 100 Day Marathon Plan approach did I truly understand the simplicity of it. Marius has broken it down and made it easy to understand and to take anywhere. The addition of the heart rate monitor parameters (at Kenyan Intensity) make it doable by anyone, anywhere. I honestly have enjoyed all of it. I know Marius was able to get the best out of himself and his running and medical knowledge should be followed. Wonderful program. I personally loved the heart rate effort zones. I live in a place that has rare ideal weather and to be able to run without becoming a slave to the watch has given me a bounce in my step! Every runner would benefit from this program!"

Marty Dalton
2.20 marathoner
★★★★★

"I am a 69 year old marathon runner who has run 186 marathons including 3:14:45 as a 55 year old. I purchased the 100 day marathon plan and this is my experience: I noticed already in the three introductory weeks of the program how my legs got lighter and the times pr km started to go down. For example the Zone 1 easy runs to my job was at that time 6.15-6.25 pr km. Now, ten weeks later, that same effort is down to 5.20 pr km. Because I write a daily training diary and have done so since 1978 I can clearly see how my training times are radically faster then they have been in many, many years since starting the 100 day marathon plan. What has struck me as considerably different with the 100 day marathon plan then any other program I have used is the great variation in the training, for example in week nr 7 the type sessions where you run for 60 minutes with variation between Effort 2 and 4. In addition to that I've had great benefits from your "Special Strides". Today, only 6 days after a marathon where I did a 30 minute year best following the plan, I feel fully recovered. I would recommend the program to anyone, when the results for me are so dramatic - who is not a top athlete, I suspect it will have even greater effect on better runners. In addition to that, I believe most joggers will benefit from this kind of structured program."

Per Oscar Holm-Olsen
186 time marathoner and 4.06 marathon (30 minute year best) as a 69 year old following the 100 day plan
★★★★★

"I just run Marine Corpse Marathon in 3:03 - 11 min off my previous PR following the 100 day marathon plan! I want to run Palm Beach Marathon Dec 6 and would like to break 3hr. ....five weeks weeks later : Hi Marius, soo excited as I said on 25th of October I did a 3:03 in Marine Corp. I just did Sunday Dec.6 a 2:57 PR in the Palm Beach Marathon, Thanks!!!! Took off 7 min in weeks and broke that sub 3hrs and feel great! Thanks!"

Carrie Pustilnik
3:03 Marine Corp Marathon October, 2:57 Palm Beach December
★★★★★

"What I enjoyed most of the plan was the ease of picking a schedule and fixing the workouts to my work schedule. I am a District Chief with the Laredo Fire Dept. and work 24 hours and 48 hours off. Most of my runs were early morning. The plan took out a lot of guesswork on how to prepare for my first marathon. When I researched a marathon plan there was a lot of skepticism about how it is almost impossible to run a marathon if you havent had a good base for over a year. Another thing that the plan did was inspire me to RACE my events not merely survive them. Upon completion of your program there was no doubt in my mind that I would not finish my first marathon. The question turned from, will I finish into how fast will I finish ? I could have run it at a lot slower pace and sprint at the end...but I still have that competiveness that makes me compete.. even if it is only competing against my own set times. My trainings/results improved me by about a minute in a 5k to 3 minutes on 10K. My favorite sessions were the long runs where I would use them to listen to good music and relax. I would recommend this plan to anyone willing to put in the time it takes to train for a marathon. From novice to advanced runner. I am proof that what seemed as an unattainable goal at times can be attainable taking one day at a time using your plan. Like I've mentioned before, this inspired me to try to go faster and qualify for Boston."

Ruben Vegas
District Chief, Laredo Fire. Dept. Ultimate Goal: Boston Marathon Qualification
★★★★★

"Hi Marius, First of all thank you for the 100 Day Marathon Plan, for always answering my questions and for all of your advice. Today, my participation on the Utah Valley Marathon went pretty well. I made a PR of 3hr 24 min 37 sec, and I earned my shirt that says Boston Qualifier yeah! :). It felt so good. All the workouts you gave me help me to push through the hardest miles, I never hit a wall, and was able to walk on my water/sports drinks stations and pick up running with no problems, I took the Imodium ( only one tablet) and had no stomach proplems. I only stop once for the porta potty for No 1. I did feel the muscle stiffness from mile 22 to 26.2, but my legs never stopped responding. I was able to finish strong and will certainly recommend this training to my runner friends. It is fun, it helps you stay very focused on every session of the training and the risk of injury is very low. I loved all the tips you give to avoid muscle cramps, stomach problems, drinking prior and during the marathon, self massages, etc. Thanks again! Best Regards"

Diana A. Anderson
3.24.37 Utah Valley Marathon
★★★★★

"I started running 3 years ago for fun. Since then I have finished 3 marathons and also run shorter road races. My personal records are 10k 36:50 Half 1:22:10 Marathon 3:01:07 The 100 Day Marathon Plan is clearly explained and makes following the plan very simple. It takes the guesswork out which makes it harder to overthink the training and just go out and run. I especially liked the self massage part, I had not seen it in any program/book and I think it could certainly help to recover faster. Who would benefit from this type of plan ? The program seems written for people that have little background in running terminology and how the body responds to different stimuli in training."

Francisco Rosa
3:01 marathon runner

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Meet the Coach

Meet Your Coach: Dr. Marius Bakken

I've spent most of my life trying to understand what makes runners faster. As a competitive runner, I ran 13:06 for 5000m and was fortunate enough to make two Olympic teams. I also trained as a doctor, which gave me a different way of thinking about the body and training.

Back in the late 1990s and early 2000s, I became fascinated with threshold training. I did thousands of lactate tests—mostly on myself—and kept experimenting with different approaches. Some of what I learned eventually found its way into what people now call the "Norwegian method" or "double threshold" training.

The 100 Day Marathon Plan grew out of that work. It's the same basic principles, just adapted for marathon runners rather than track athletes. Nothing revolutionary—just an honest attempt to apply what I've learned over the years.

  • Medical Doctor practicing in Norway
  • Two-time Olympian (Sydney 2000, Athens 2004)
  • Developer of threshold-based training approaches

"Give me 100 days, and I'll show you what your body is truly capable of."