Originally Posted by
Branko D
VO2max is similar, so oxygen consumption at threshold to VO2max is similar, and hence energy expenditure is similar. In the end it boils down to basic physics.
400W is not only sustainable for 4 minutes. Running a marathon in 2 hours and small change is a 400W kind of effort. Maybe slightly less for a very light runner.
Yeah I see what you mean. But it doesn't explain the power output differences between cycling and running. I guess when seated on a bike you can turn more of that V02 max effort into output power than you can running. I know I certainly can anyway!