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INSCYD journey with German Swimming to Gold

Updated: May 24, 2022

One year after becoming the very first athlete of the German Swimming Federation to use INSCYD, Florian Wellbrock now is the very best marathon swimmer in the world.

At the beginning of this year we announced the start of the collaboration between the German Swimming Federation (DSV) and INSCYD. Together, we chose to take a small group of national swimmers to start with. With Florian Wellbrock and Sarah Köhler being part of this group, all recent olympic victories come from this initial group. After waiting 13 years for an olympic medal and 33 years for an olympic gold medal, DSV is now back in

the fast lane.


Over the last 12 months, INSCYD and DSV worked closely together. Testing protocols were developed and fine tuned, test data was discussed extensively. Example topics are: how can we use the INSCYD test results in training and racing, what does an ideal VLamax look like for a specific athlete and swimming distance and what lactate accumulation rate can the athlete sustain in the final of the race and for how long?


Florian Wellbrock first won the bronze medal in the 1500m in the pool. This is obviously a much shorter distance than the 10km open water marathon, where he won gold. The races also require a slightly different energetic profile. Performing at both races shows how well Florian understands the race demands and how to prepare himself for such varying efforts.

Florian (already World Champion back then) was not only the first to perform an INSCYD test, but also the athlete who collected the most INSCYD data over time, he often was a good use case example to discuss.


The INSCYD software enables coaches to precisely understand the physiological capacities of their athletes. Therefore coaches are able to identify strength and weaknesses of certain metabolic metrics of their athlete. A coach can easily leverage this information into practice to create the most efficient training programs. Two good examples are the ability to optimize pacing- and fuelling strategies. Knowing the exact maximal swimming speed you can sustain during a 10km swim ensures you that you never go too fast or too slow. Knowing the energy required for such an effort makes sure you consume enough energy during the race to keep up the speed during the full 10km.

The lactate accumulation graph for instance shows the lactate build-up or recovery at any given swimming speed. This can be used as a marker for fatigue accumulation.

“Understanding how training stimuli is created by the design of resting periods, intensity and load time can be best developed and showcased with INSCYD data.” – Head of Diagnostics, Dr. Alexander Törpel

Another example is the fat and carbohydrate combustion graph, which shows exactly how much fat and carbohydrates a swimmer burns at any given swimming speed. Combine this information with the glycogen content at the start (from the INSCYD glycogen calculator), and you know exactly how much you should refuel.

“We can now quantify the effect of the training and plan the next stimulus much more specifically.” – Head of Diagnostics, Dr. Alexander Törpel


When you look at recent races from Florian Wellbrock, you’ll notice how dominant his performance is. He’s able to plan and execute both his fuelling and has pacing strategy like never before. We encourage coaches and federations who pursue similar goals to get in touch with us. We look forward to getting to know each other. Book your free appointment now, or leave your contact details so we can reach out to you.

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