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2025 marks a permanent shift in how to renew your energy and enhance your Running performance. based on consults we had with over 900 individuals from all over the world we understand the challenges you're facing..

2025 marks a permanent shift in how to renew your energy and enhance your Running performance. based on consults we had with over 900 individuals from all over the world we understand the challenges you're facing..

The Truth Behind Why You Are Having Setbacks And How To Get Your Running Performance Back

Marlies Kort and Coach Baz - Founders - The CENTATHON System
a permanent shift
2025 marked a permanent shift in overall wellbeing, running and fitness approaches. On this page we share precisely why this shift is happening today, who we are, what we do to help you, and why it is urgent to start. A full breakdown, based on consults we had with over 900 runners from all over the world in the past 5 years.

This is what we hear most: "I train harder and harder, push myself, but I'm not really getting any better! It's like my performance is fading away. I feel low in energy, I'm not really motivated anymore. 2 years ago everything went effortlessly. That feeling is gone now. And I haven't actually changed that much in my way of training! It's so weird. I really don't know what's going on."
Underlying Reasons
Now here's a difficult yet transformational truth you don't want to hear. We have been deluded with deep rooted training mistakes and nutritional choices our trainers, personal coaches and dieticians told us the past 40 years.  Consider the underlying reasons for your lack of improvement. It's important to recognize that the issue is not just related to your training methods. In fact, your training approach hasn’t changed that much; you’re still adhering to the same routines.

At the same time, you may be experiencing a gradual loss of muscle and overall strength, along with some weight gain. You might have noticed unwanted visceral fat accumulating- and you probably attributed these changes to aging. 
Deep-rooted training mistakes traditional trainers and nutritionists told us the past 40 years
Tried everything
And you tried everything, haven't you? From adopting a straightforward, no-nonsense running-more-miles approach to increasing your training intensity and frequency, you’ve tried everything..

This includes following calorie deficit diets to shed pounds, and doing various online quizzes to identify the root of your issues. You may have even turned to high-tech running apps, purchased advanced devices like Stride, and experimented with popular running form programs such as Pose, Maffetone, and Chi Running. You’ve explored methods advocating for front foot landings, high cadence techniques, and quick-fix 30-day fitness challenges, culminating in the purchase of the latest $400 carbon-plated shoes—only to face yet another mild stress injury.

Despite all these efforts, you may still find yourself puzzled by the gradual decline in your running performance.
Puzzled by the gradual decline in your running performance
Another angle to your fading running performance
You may have concentrated on running as a solution to your performance issues, but it's important to recognize another crucial factor: your metabolic performance.

Your metabolic fitness and health serve as the fundamental drivers of your athletic capabilities. They influence your recovery, your body's ability to maintain a state of autophagy, and your overall energy production—both aerobic and anaerobic at a cellular level. Good metabolic health empowers you to effectively manage your weight and control the accumulation of visceral fat, while also supporting your cardiovascular well-being.

Moreover, a solid foundation in metabolic health is essential for enhancing your athletic performance, your VO2 max, building muscular strength, and sustaining energy levels. It also plays a significant role in cultivating mental resilience, helping you feel confident, motivated, and focused.
Western life getting in the way
Western life getting in the way
The decline in your metabolic health is not primarily due to intentional choices you are making. 

Rather, it results from the daily lifestyle habits and nutritional decisions that we often overlook. These choices contribute to a sense of dissatisfaction and a departure from how you used to feel. Many individuals are unaware of the specific factors leading to this persistent feeling of decline.

To effectively enhance your running, fitness, and overall well-being, it is essential to adopt a comprehensive approach that prioritizes your metabolic health. This involves implementing actionable steps and strategies that can be integrated into your daily routine. By focusing on boosting your metabolic performance, you can simultaneously improve your health, fitness levels, and athletic performance.
Athletic AND Metabolic overhaul
Today, a staggering 95% of Americans suffer from various health issues, including food allergies, joint problems, asthma, early signs of insulin resistance, obesity, osteopenia, high blood pressure, and pre-diabetes. 

The common thread linking these conditions is inflammation.

Inflammation serves as a fundamental factor in the chronic disease epidemic affecting our society, contributing to cardiovascular diseases, metabolic disorders such as fatty liver and type 2 diabetes, neurodegenerative diseases like Alzheimer’s and Parkinson’s, and even numerous forms of cancer.

We are all affected by this inflammation epidemic.

Recent scientific studies published in reputable sources like PubMed and The National Library of Medicine suggest that our chronic disease challenges are not as complex or unsolvable as they may seem. The narrative is straightforward: we have eaten our way into this, and we can eat our way out. Below an example a scientific study on how diet influences metabolic health on diabetes. We found hundreds of published studies supporting the same narrative.
Example (Elsevier Open Access) of one of many recent scientific studies on metabolic performance increase through non-medical intervention
The Energy Supply SWITCH
To regain your speed and enhance your running performance, we need to adopt a comprehensive approach. This strategy should focus on improving your performance from two perspectives at the same time: an athletic overhaul and a metabolic transformation. In the CENTATHON Longevity Running and Fitness system, we refer to this as the Energy Supply SWITCH (ESS).

A FUNDAMENTALLY new paradigm for enhancing your running and overall fitness. Traditionally, performance improvement has centered around new training methods and schedules. In contrast, with CENTATHON we emphasize on the significance of addressing the foundational elements that contribute to performance enhancement. This includes not only your training regimen but also the monitoring of key indicators and biomarkers related to your metabolic health. By gaining insights into these underlying factors, we can tailor a program that effectively improves your overall performance.
The Six Steps In The NEW Model - How we work
With CENTATHON, we have established a comprehensive six-step model aimed at enhancing your running performance through the integration of metabolic health. Each step is designed to build upon the previous one, ensuring a holistic approach to your improvement journey.
6 Steps in the NEW MODEL:

Measure: The first step involves assessing your current status. Using the CENTATHON Index and a set of measurable biomarkers, we will clearly define where you stand today. This foundational understanding is crucial for tailoring your journey.

Plan: Next, we will develop a strategic plan that outlines where to begin and how to effectively enhance both your running and metabolic performance. This plan will serve as your roadmap, guiding you toward your goals.

Implement: With your plan in place, we focus on structured implementation. You will receive our highest level of personal guidance and one-on-one support, ensuring you stay on track and motivated throughout the process.

Short-Term Results: You can expect to see quick progress early on, which serves as an encouraging indicator of your potential. However, we understand that rapid gains are just the initial step in your transformation.

Long-Term Results: As you continue your journey, we will analyze your ongoing results to identify areas for further growth. This iterative process will help you achieve improvements and changes that may have seemed unattainable at the program's outset.

Lifelong Ongoing Growth: Finally, our approach emphasizes the importance of continuous development. You will consistently make data-driven decisions that lead to new levels of achievement and new plans for ongoing growth throughout your life.
By following these six steps, you will not only enhance your running performance but also foster a sustainable approach to your overall health and well-being for life.
A sustainable approach to your overall health and well-being
Change your perception of lifelong running and fitness
Working with us in person and engaging in the CENTATHON Longevity Running & Fitness Program goes beyond simply enhancing physical skills. It represents a comprehensive transformation of both your running technique and overall fitness—an integrated revision of your athletic and metabolic performance.

Yes, you will run faster and you will complete another marathon, but you will achieve these goals without the need for endless, exhaustive long and slow 18+ miles training runs. Say goodbye to the gradual burnout associated with traditional training methods, and leave behind restrictive calorie deficit diets. These outdated approaches are no longer part of the strategy for improvement; they have no place in the new CENTATHON training system.

CENTATHON is not just another training plan; it is a transformative experience tailored to elevate every aspect of your life. This program will fundamentally change your perspective on lifelong running and fitness, setting you on a path to sustainable success and well-being.
A transformative experience tailored to elevate every aspect of your life
CENTATHON Longevity Running & Fitness
The CENTATHON Longevity Running and Fitness program has successfully transformed the behaviour and practices of runners across various ages, weight classes and fitness levels, ensuring highly effective steps into an enjoyable running and fitness based longevity journey.

You will not only get the knowledge how to transform yourself. You will also get a deep understanding of how to control both your athletic AND metabolic performance and wellbeing- which you can share with the people around you, your family, your spouse, friends, the people you love and concerned with.
A deep understanding of how to control both your athletic AND metabolic performance
numbers do not lie
Working on your metabolic- and your running performance requires an accurate and precise approach. In the CENTATHON Program we work with a highly efficient structure, with a balanced set of markers to actually measure and monitor your progress. 

We use quantitative evidence to make informed decisions. Numbers don't lie, such as your MHR (your Marathon Heartrate Sweetspot), your VO2max, your strength level (based on the CENTATHON Index System), your blood glucose levels, the amount of ketones your liver is producing, your acidity pH values, the level of autophagy you're currently in (the natural self-cleansing ability of your cells), and your systolic and diastolic blood pressure. 

You will learn to monitor and document those (bio-)markers in personal data-files we will provide, including the required devices for measuring all of the above mentioned bio-markers, together with our personal advise, help, our operating routines,  procedures and structures. Everything is included in the CENTATHON Longevity Running and Fitness Program.
Numbers don't lie (bio-markers example)
Numbers don't lie (running data example)
A unique chance to Work with the founders in person
CENTATHON is a full service program. Marlies Kort and Coach Baz work with all students in person, through online sessions you can schedule yourself, on any date and time convenient for you, via Zoom. We actually provide you with a complete set of devices and tools to monitor all bio-markers as described above: our celebrated CENTATHON BOX. And you will get access to our knowledge bases we developed over the past 2 decennia, the CENTATHON Resources Platforms you will get exclusive and unlimited access to. We will teach you the structures and routines to record and document your numbers progress over time, for life.
Bastian Zwaan MSc (Coach Baz) received his degree from the Technical University of Delft, The Netherlands, on Ergonomics and Human Factors, the science of human interaction and design. Bastian (66) is certified neuro-assotiative top-coach and co-founder of CENTATHON, CENTATHON Longevity Running and Fitness, the CENTATHON Longevity Index and The 9Mile Marathon Training System, together with Marlies Kort.
With an avg. CENTATHON Index Score of +30(!), a VO2max of 48, autophagy GKI index score of 80, full Ironman finisher, 1 mile in 8mins and a 4hr marathon finish time Coach Baz wants to be a living example of how the CENTATHON Daily Routines help to improve both lifespan AND health-span. 
Marlies Kort, busy mom of 2, creator and founder of The 9Mile Marathon training system, and co-founder of CENTATHON, CENTATHON Longevity Running and Fitness, the CENTATHON Index together with Coach Baz.

Marlies (52) studied architecture and interior design, and she is a certified running and fitness coach for 30 years. In 2015 she became World Champion Ironman 70.3 in the Female 40-44 category and she won numerous Ironman 70.3 races such as Aruba, Miami, Tennessee, Panama, Boulder, Cartagena, Austria, Puerto Rico. Top10 marathon finishes in a.o. Boston, New York, Miami, Rome, Berlin, Curacao and Rotterdam. Her running pb's are impressive - Marathon pb Berlin 2h47, Half Marathon pb 1h16, 10k pb 35:12 and 5k pb 17:02
This is how we work
In the CENTATHON Longevity Running and Fitness program you will have direct access to us, the founders Marlies Kort and Coach Baz, in person. You will get exclusive access to:

✓ 60min 1:1 online ZOOM Strategy Sessions, every 10 days (you choose any date & time convenient for you), with us, in person
✓ Whatsapp 1:1 hotline chat-on-demand, with the founders Marlies Kort and Coach Baz in person (24/7 - anytime)
✓ quick 12min 1:1 online ZOOM Catchup Calls, on any topic you need us for (for as often as you want)
✓ fully personalised 2-months assignments and activity/training schedules (we will design for you), to work your way up the CENTATHON Longevity Index, both athletic and metabolic
✓ 1-year plans with clearly defined longer term goals based on measurable quantified results, again both athletic and metabolic
✓ weekly 60mins ZOOM Group Calls, lead by us in person, with lectures and Q&A with like-minded CENTATHON students
✓ access to our knowledge bases, the CENTATHON Running and Fitness Resources Platforms, with numerous articles, training videos, training schedules, instructions, guidelines and dozens of relevant medical sources, teachings and scientific research by medical professionals to further deepen your metabolic knowledge and understanding. Our resources platforms are continuously developed and extended with relevant content we constantly aggregate and curate for our students.

We work on a monthly basis, and you can cancel anytime, no questions asked. 
First Results In 2-3 Weeks
The CENTATHON system allows to measure and quantify the progress you are making in terms of quantitative evidence based data. This applies to both athletic- and metabolic performance. Our students show first results after just 2 or 3 weeks. Improving their running, their strength and improving measurable metabolic indicators such as your state of autophagy- immediately resulting in better sleep quality, a clearer mind, energy and recovery. We have seen dramatic (metabolic and athletic-) results after just one month. Most LASTING progress and transformation is made after 2-3 months. 
Our students show first results after 2 - 3 weeks
New Routines
Our aim is to help you develop new routines and reach a new level of metabolic and athletic balance based on the CENTATHON Index. Many of our students who work with us for a year have secured their new routines and habits for life. Currently we have students who are working with us for 3 years and more, reaching new levels of controlling and securing their metabolic health and their athletic performance on events like half- and full marathons, Ironmans, ultra's and Crossfit style events such as bootcamps, ultra obstacle races and multi-day multi disciplinary outdoor events. Even in their 50's, 60's and 70's. The main reason for working with us a longer period of time is our personal coaching, guidance, accountability, involvement and trust to help stay on the right track- our gentle way of continued reminding of the bigger-picture which is to build the foundation for a happy and healthy life, now and later on. 
What's Next
We're are excited to offer exclusive complimentary 1:1 Zoom consultations. This is a wonderful opportunity for us to connect, get to know each other, and explore wether we're a good fit for your needs. 

Choose any time convenient for you:  CLICK TO SEE AVAILABLE TIMES
When you sign up for your call be sure you are in a quiet place (no multi-tasking, driving, no restaurant etc.) and be exactly on time. Our time is valuable and our time is very limited. And we bet yours is too. Please make sure to reschedule your call if you are unable to make it. You can do so by clicking on the reschedule link in the confirmation email we will send. 
Is it worth the cost?
With the CENTATHON Longevity Running and Fitness program we tackle the fundamental question that you face during your lifetime: "What can I do NOW to improve my running, fitness, quality of life and my longevity?" For students dedicated to collaborating with us in person and willing to put in the work, this program has the potential to significantly alter the course of both your healthspan and lifespan.
We are unable to determine whether the advantages of this program justify the cost, especially when considering the long-term benefits over your lifetime. And, in particular, if you amortize the cost over your life as you should amortize the program benefits over your life. 

Nevertheless, we can confidently state that we developed this program with the explicit intention that the long-term benefits unquestionably outweigh the cost!
Above and beyond what is available for free
CENTATHON weekly (student only) group calls
It is of greatest importance to us to offer all of this without depending on paid advertising. To achieve this, our operations are fully supported by our members, and in exchange, through the CENTATHON Program, we provide carefully curated content, video tutorials, vision, strategies, lectures and new paradigm shift insights with a 100% unbiased, open view, free from influence, guidance, or control of others. Please note that this service does not provide medical, professional, or licensed advice and is not a substitute for consultation with a health care professional. You should seek medical advice from a qualified health care professional for any questions. When you are in doubt please always consult your doctor or a health care professional first. The information on CENTATHON is for informational purposes only and may not be appropriate or applicable for your individual circumstances. 
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