How Tim Wolvetang ran a PB at the Dutch Championships two weeks after a disappointing 100K World Championships.

Athlete at a glance

Athlete	Tim Wolvetang
Age	35
Profession	Anaesthesist
Background	Former triathlete
The challenge	A kinked iliac artery ended his triathlon career.
New sport	Ultra running
Ambition	Run as fast as possible over 100 kilometer
Result	7h27:19 at NK 100 kilometer

Sport can be very simple.

You train well, arrive at the start line fit, and have a good race.

And sometimes the exact opposite happens.

That is what happened to Tim Wolvetang in the summer of 2022.

This case shows that endurance coaching is not only about training plans and training data, but also about maintaining trust when an important race turns out differently than expected.

Everything seemed to be falling into place

After the end of his triathlon career, Tim found a new challenge in ultrarunning. A kinked iliac artery made it impossible for him to cycle comfortably in the time-trial position. For Tim, a passionate endurance athlete who loves long and demanding challenges, that was no reason to quit.

He shifted his focus to ultrarunning.

It started with a track marathon during the COVID period in 2h42. He then qualified for the 100-kilometre World Championships with a time of 7h38.

The build-up towards the World Championships went well.

Training went according to plan. The volume and quality of the sessions were where they needed to be. Consistency. No injuries. No signs of overload. No doubts about his form.

There was one uncertainty, however. Six weeks before the World Championships, Tim got COVID. For two weeks, he was unable to train. Although he was able to resume his preparation well afterwards, the question remained how his body would respond to a 100-kilometre race.

Still, both Tim and I felt that he was ready for a strong race.

The World Championships that went wrong

But sport cannot always be predicted.

At the 100K World Championships in Berlin, Tim started well. Until around 40 kilometres, when his engine began to falter.

His body simply gave up.

No injury. No clear nutrition issue. No mental collapse.

He simply could not continue.

In hindsight, a combination of factors seems likely. The COVID infection during the build-up. Temperatures around 30°C. High humidity.

But we never found a conclusive explanation.

That made the DNF even more frustrating.

Endurance coaching: what now?

After a disappointment like this, many athletes start looking for explanations.

Maybe the preparation was not good enough.

Maybe the training volume was too high.

Maybe there should have been more speed work, or more training mileage.

But sometimes a bad day is simply a bad day.

And that is where an important part of endurance coaching lies: distinguishing when a preparation needs to be adjusted, and when trusting the process is the best choice.

Because we saw no signs that the preparation had fundamentally fallen short, Tim came up with a remarkable proposal:

Run the Dutch 100-kilometre Championships in Winschoten. Two weeks later.

No endless analysis.

No turning everything upside down.

Just try again. It says a lot about Tim’s mental resilience.

The proof of the pudding

And so, two weeks later, Tim was back on the start line.

Warm weather was forecast once again. That made the race exciting and a bit frigthening. Especially after what had happened in Berlin.

But from the first kilometres, Tim ran in control.

Calm. Disciplined. Without letting himself be influenced by the disappointment of two weeks earlier.

After 30 kilometres, he was running as the third Dutch athlete in the race.

Around 60 kilometres, the second-placed Dutch runner was still several minutes ahead.

Then the race began to turn.

Where many ultrarunners lose time in the second half, Tim kept running strongly. His competitors began to fade. Tim did not.

Over the final 40 kilometres, he moved further and further away from his chasers.

After 100 kilometres, the clock stopped at 7h27:19.

More than eleven minutes faster than his previous personal best of 7h38.

Over a distance where every minute counts, that is a huge step forward.

But perhaps even more important than the finishing time was the confirmation it provided.

The preparation had worked.

The trust in the process had been justified.

Endurance coaching: what we have learned

Sport is not always logical.

Sometimes your preparation is good, and it still does not work out.

The biggest mistake you can make in that situation is giving one bad race more weight than all the months of preparation that came before it.

Good preparation increases the chance of a good result. But it never offers a guarantee. Endurance coaching is not only about training better, but also about learning to deal with the uncertainty that comes with performance sport.

Tim’s lesson is therefore simple.

Not every disappointment calls for a new approach. Sometimes, what it mainly requires is trust.

Trust in the work that has already been done. Trust in the process. And the willingness to stand on the start line again without turning everything upside down.

Two weeks after his DNF at the World Championships, Tim ran 7h27 at the Dutch 100-kilometer championships and claimed the Dutch national title.

Not because he had suddenly become a better athlete in those two weeks. But because he did not allow himself to give one bad day more weight than a good preparation.