Coaching for triathletes and endurance athletes
My approach

Personal Coaching

Besides good training schedules, many athletes need personal attention and feedback on how the training sessions are performed. These aspects are central to my coaching. If you have a question or would like to discuss a topic, I am always there for you. I am also closely involved in the execution of your training and you regularly receive feedback and tips about how your training is going.

The coaching is very varied. Some athletes are already very experienced but have difficulty making progress themselves, these athletes get help to make the next step with smart schedules. Other athletes may have done a triathlon before, but they are still searching how to tackle this, also in this coaching will help you enormously.

Read on for more information and if you have any questions please contact without obligation.


About me

I am David van Oosten, born in the Netherlands and a certified endurance coach with many years of (personal) endurance sport experience from regional to international level. Coached by one of the best trainers in the Netherlands.

Endurance sport is my passion, both doing it myself and helping other athletes achieve their goals.

I spent years struggling to find the right balance in my own schedules, I wanted too much and I trained too hard too often, which resulted in frustrations and injuries. Until a coach guided me and showed me how to train properly and smart.

I enjoy sharing the knowledge I gained during my coaching education and the experience I gained during all my years as an athlete.

Some personal highlights:

  • Ironman World Championships in Kona Hawaii
  • Full Ironman finish under 9 hour
  • 19x half distance - PB 4:06
  • Ironman World Cup 70.3 Port Elizabeth (South Africa)
  • Podium Challenge Almere - half distance
  • 2x Northern Dutch champion Olympic Distance
  • Many local victories
  • Marathon PB 2:47:21
  • Half Marathon PB 1:17:06 (in a half distance triathlon)
  • 10km PB 34:50

Click below to find out more about my vision on training

My vision

How does it work?

1. Intake

After a first introduction, I will send you an intake form on which you provide background information about yourself, Β your sporting past and your ambition. Personal things such as work / private life and which days you have time for training are also included. After receiving this information we will discuss this together during a face-to-face meeting (or by phone if a meeting is not possible).

2. Make your personal year plan

After the intake I will make a custom plan focussed on your goals and desires. We also will set a date on which we will start the training. At the start of the schedule I will schedule some tests so that I know what your zones are and the training will not be too heavy or too easy.

3. Weekly schedules

You will receive your schedules on a weekly basis in Trainingpeaks and you can upload your completed training sessions here, this can be done automatically using a cycling computer or smart watch. After each training you give feedback on how your training went. I get a notification of this and so I can follow how your training goes and I can adjust where necessary. I don't plan ahead more than a week so that I can always be on top of what you need at that moment.

4. Flexible schedule

Your schedule is not cast in concrete. If there is something unexpected then you have the freedom to reschedule training sessions during the week if that fits you better.

As your A-race comes closer, the training sessions will become more specific and if necessary we will schedule a coaching conversation to ensure that nothing is left to chance on race day.

5. Unlimited contact through Whatsapp

I think it is important that you can continue quickly if you have questions about your training / schedule. Whatsapp works ideal to answer short questions quickly, I always try to answer your questions immediately.

Individualized Training (Premium package)

Personal profile

Every athlete is different. However, the same zones are often used for every athlete, based on FTP. With individualised training, the training zones will be determined per athlete. Advanced software is used to create a personal profile for every athlete.


Multi seasonal overview

To continuously keep making progress, it is important to progressively increase the training load, not only in the current season but also over several seasons. To keep an eye on this, data from recent years is being monitored.

Smart workout targets

Classical trainingzones are made for the average individual, however every person is different and unique. With the use of WKO software personalized trainingzones and training targets are determined.


Strenghts and limiters

Strengths and weaknesses will be determined and a profile will be made. This profile can be used to train very goal orientated to the specific requirements of the event for which you are training.

Empty your battery

Do you train too hard? Or maybe you could have pushed a little bit more? For each training you can see how deep you have gone and whether more or less rest is needed.


Prediction of your bike split

With the help of Best Bike Split a detailed plan is made of your most important races. The race course will be uploaded and the software calculates how fast you are on that course. You can play with this yourself by, for example, adjusting your power or weight and seeing what your gain / loss will be on this course.

They preceded you

I've been in the triathlon sport for many years but I've never really trained with a schedule. I often doubt whether I was doing the right thing. Is the intensity right, am I getting enough rest, is the frequency good? Time for a coach! David looks at the possibilities and takes your wishes and goals into account. He is easy to reach when you need some changes or have doubts. Very happy with a coach like David and not unimportantly also an Ironman medal from Copenhagen in my pocket!

Sarah-Lynn πŸ‡³πŸ‡±

At the end of 2017 I started training under the guidance of David. By structurally and specifically training I have made great progress and have been able to win my first race. With David's support I know for sure that I can continue this progess in the future.

Sander πŸ‡³πŸ‡±

Since the beginning of 2019, David has been taking care of my training plan every week. The goal was to improve my personal records at different running distances and the main goal was to finish an Ironman 70.3 within 5 hours. The coaching was excellent with the use of Trainingpeaks, also when adjustments were needed. All goals so far have been achieved beyond expectations and that is why I am more than satisfied with David's coaching and the method he uses.

Ritske πŸ‡³πŸ‡±

After training on his own for 4 years, now trying to make big progress this year under the guidance of David. Improve myself in all areas wit help of a focused training schedule, so that I can peak at the right time. David's progress and feedback through Trainingpeaks motivate me to get the best out of myself.

Kim πŸ‡³πŸ‡±

After years of strenght training and occasional participation in a running competition, I was looking for a new sporting challenge. I had heard of the Ironman and decided at the end of 2018 to register for half an Ironman in Luxembourg. I didn't have triathlon experience, not even a racing bike. After six months of training, I lacked structure and knowledge I needed to prepare well. I found David and we quickly made an appointment. Because of David's personalized coaching and training schedules with challenging workouts, I was able to train in a structured way and I gained much confidence in the process. David prepared me for the Ironman 70.3 in Luxembourg in 4 months and it has now been completed. Thank you David!

Mark πŸ‡³πŸ‡±

For the first time in may years I train with a goal! I have been wandering in the dark for a long time but now I found motivation and a reason to train. And I have taken help, I think one should if you are like me, overtraining or undertraining. With David I have structure and everyweek there is something new. Fun and motivational!

Susanne πŸ‡ΈπŸ‡ͺ

My goal - to be a finisher of Ironman Kalmar 2020. David and I had contact during the summer of 2019 and it became very natural that he would be the one to coach me towards my goal. David is genuine and talented. He’s also very involved in my training. David started coaching me in August and after just a couple of weeks with structured training I noticed a big difference. Above all, my running and endurance have improved and I’m looking forward to getting even better! Even though it’s distance coaching, David is always present. If I ask something I always get quick answers.

Anna πŸ‡ΈπŸ‡ͺ

I started training for triathlon in 2018, not knowing how to train exactly. Some swimming, cycling and running, then it should be fine. But my results were disappointing! Everyone flew past me, and that had to change! I came in contact with David and together we discussed my goals. Everything has now been worked out in TrainingPeaks, and I get new schedules from David every week. These schedules are specific to me and very challenging. The right motivation for me to get the best out of myself!

Jaldert πŸ‡³πŸ‡±

Before I started training under the guidance of David "I juts did something and hoped for the best". Every training as fast as I could and always looking for the max. Overload and overtraining were on the lure. Since a few months I train under the guidance of David and I am now much more focused on technique and training in different heart rate zones. This approach is really starting to pay off because I am faster and fitter than ever. The highlight so far was the Ironman 70.3 in Zell am See, Austria. On to the next challenge!

Perry πŸ‡³πŸ‡±

I started training with David as a relevant novice to the sport in mid-2019, with Ironman Barcelona as my goal for October of that year.
He came with an extremely professional approach to training and with the way it was structured, I never felt drained or over trained. Along the way David was also always available for questions and feedback and I felt extremely supported throughout the process.
The goal leading up to IM Barcelona was to finish in 12 hours 30 minutes and I managed to do it in 10 hours and 40 minutes, surprising even myself. Can’t recommend David enough!

Bryce πŸ‡ΏπŸ‡¦

After years or training and racing without specific training I asked David to coach me to find out what more I have in my capabilities.

The workouts David prescribed have helped tremendously and working with structure has made me a stronger cyclist. David works very structured but is also flexible when needed and there is room to give my own thoughts into the process.

Anton πŸ‡³πŸ‡±


    Basic For athletes who want strucure and coaching


    per month
    • Personal annual plan
    • 2 Weekly schedule
    • Weekly contact through whatsapp/messenger
    • 50% discount on 1 lactate threshold test
    • Weekly terminable
    Contact me

    Professional For performance driven athletes


    per month
    • Fully custom made for you
    • Daily feedback on your workouts in Trainingpeaks
    • Data driven coaching with WKO5
    • 1 free lactate threshold test per year
    • Prediction of your time using best bike split
    Contact me


    Personal coaching is more than writing schedules. This package is suitable for athletes who want to be coached and who want frequent contact. We start with an intake meeting to determine your goals and to make a plan towards these goals. You receive 2-weekly training schedules in your TrainingPeaks account.


    Driven to perform and try to get better every day, looking for your personal limits. If you recognise yourself in this, then this package is best for you. This package distincts itself in daily contact and feedback and highly data driven coaching with the help of WKO5. Both as an athlete and coach we can expect the best of each other. You don't have to be a professional athlete for this package, it's your drive which counts!

    • Only for serious athletes who are willing to train on a daily base
    • You have to give daily feedback on your training (in TrainingPeaks)
    • Powermeter required
    • Trainingpeaks Premium account required (you can get discounted pricing through DVO Coaching)


    Complete customization for performance driven athletes. I expect a lot from you and you can expect a lot from me. Together we give everything to achieve great performances.

    Student discount

    Are you a student? Then you get 25% discount on all packages.

    Frequently asked questions