Running Power Experts Hans van Dijk and Ron van Megen

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2:00 meet life-long runner and retired professor of engineering Hans van Dijk

5:00 meet (also a) lifelong runner and engineer Ron van Megen

9:00 where does all that work that we do as runners go?

Overcoming running resistance (influenced by running efficiency)

Overcoming aerodynamic drag

Overcoming changes in elevation

11:30 running efficiency / energy cost of running (ECOR)

Potentially large interindividual differences: up to 20%!

Minimized through training

13:15 aerodynamic drag

Average runner CdA is 0.24 in free air and 0.20 while drafting

Eliud Kipchoge was down to 0.16 during his Breaking 2 attempt

18:15 changes in elevation

Running efficiency improves when running uphill and worsens when running downhill

20:30 factors that influence running efficiency / ECOR

Global, multi-year training load: more training tends to reduce ECOR

Experiment with: cadene, arm carriage, shoes, etc., to find minimal ECOR

Reduce weight 

31:30 factors that affect aerodynamic drag

Runner speed

Drafting

34:00 Hans and Ron’s models of run performance

39:00 using the stryd power meter to calculate running efficiency

Learn more about Hans and Ron and browse their books at their website.