Power vs. Duration respectively Speed vs. Duration analysis has a long history in sport science.
Power-Duration relationships have become very popular and also very useful in managing training & performance in endurance sports – particularly in cycling. It provides a relatively easy way to get an idea of the performance of an athlete. Watch the webinar:

Besides a significant amount of knowledge and scientific data on this topic, the physiology behind the power duration relationship seems to get little respect in its application to training. As a consequence, benchmarks such as critical power and moreover W’ are often misused and misinterpreted.


– The creation of a Power-Duration relationship

– The effect of different ways to capture data in the power-duration curve.

– The physiological origin of critical power

– W’ (FRC) – what is W’? How is it energetically composed and how does it change?

The Presenter

Sebastian Weber, coach of 4x time World Time Trial Champion Tony Martin has worked with best athletes and Teams in the sport for more then a decade, including: Peter Sagan, André Greipel, Andrew Talansky, Cannondale, Katusha, Lotto, HTC-Highroad.


Sebastian is a consultant to several organizations, includung the french national swimming federationcycling ireland, Team JUMBO-VISMA, german swimming & speed skating federation,  and numerous private coaching business in europe and the US. He has his roots in coaching amateur and recreational athletes and founded the STAPS coaching & testing business in 2006.