Le breton said:I agree with what you wrote there, even more so as I fall in that category of very poor runners who are decent cyclists.
However there is a type of running where a good correlation with VO2 exists : running uphill on fairly steep slopes ( > 8-10%). With little or almost no training I would normally finish in the 30-40 percentile in local (30-40 minutes) foot races, but on uphill races it would be more like top 10%.
Running upstairs is obviously also a good marker of VO2 and it looks to me like cyclists are better suited for that type of exercise than "flat" runners.
(actually running upstairs is the best cross-training exercise -for cyclists - I know of, and I used to do it often at work at lunchtime years ago)
agree when i was running it was easy to see some athletes who were very strong but who were poor runners.Good cyclists with a high VO2Max are more of a strength type of runner, running uphill or upstairs negates the technique involved in running fast and exchanges it for power. When running on the flat efficiency and optimum foot placement is key. Too short of stride your foot falls too far behind your center mass and you compromise the push off. Too long of stride your foot falls in front of your center and you end up having to use different muscles to kind of pull and then push during your stride not efficient. The key is being familiar with what is your maximum efficient stride length for the particular speed. The shorter the distance generally the shorter the stride, as you go up in distance your speed drops and so to maintain the maximum amount of momentum with the least amount of effort your stride naturally shortens. It is all about maintaining momentum. Going uphill momentum is trumped by power. The steeper the hill the more power required. Running upstairs suits cyclists more than efficient runners as it places a premium on power and strength.