Originally Posted by
purple
As would a 10-mile runner cycling 30 miles. The 3:1 ratio is only applicable with a third point of reference, be it swimming, roller-blading, or Frisbee. The runner and cyclist, compared using a tertiary reference, would have similar endurance.
I usually only run 5-6 miles when I go running and I ride 25 miles without breaking a sweat, but I do train for half marathons.