Dutch elite cyclist Tom Dumoulin surprised the running world on November 14, 2021 by participating in the 10K of the Groene Loper Run in Maastricht (The Netherlands) and immediately becoming second in the sharp time of 32:38. In an ordinary cotton shirt and without carbon shoes, he seemed to run at ease with the leading group. The winner Wouter Simons,...

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Video recording of Alex Dowsett’s world record attempt at the Aguascalientes Velodrome (source UCI.org) On November 3, 2021, cyclist/time trialist Alex Dowsett attempted to improve the world hour record for the second time on the highland track of Aguascalientes Velodrome in Mexico. In 2015 he captured the record with 52,937 meters. After that,...

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In our book The Secret of Running we explained the power of the 4 energy systems of our human motor. The table below gives a summary of the maximum powers that are theoretically feasible with the world best athletes. First, we refresh for you what energy systems our human engine possesses and the fuel we have in the process. We conclude with a consideration...

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We are impressed with Stryd’s Race Calculator. Last week we published Ron’s experience at the Berlin Marathon. As we all know, it was hot in Berlin which caused many runners to run a lesser time, including Kenenisa Bekele (2:06:47 versus 2:01:41 in 2019, so 4% slower). We noticed in the evaluation of Berlin that Stryd’s Race Power...

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Nike ZoomX Vaporfly Next% 2 (Nike.com) We recently received the following interesting question from one of our fans, namely Eddie : “I am happy to read your articles.  Read some articles about the Stryd and the Nike Vaporfly.  The Vaporfly is about 4% more efficient than a regular shoe. I myself use the Asics Nimbus. My Critical Power is 324...

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