Quote Originally Posted by Travs View Post
I've heard various throw-away comments, along the lines of "3 miles on a bike is equivalent to 1 mile running". I certainly found 50 miles on the bike somewhat easier than 17 miles on my feet. But then again I've never been on a 'proper' competitive bike ride or race...
I think somebody else asked about that elsewhere on here. There is no easy way to compare the two and a lot depends on the terrain you are running/cycling in. As most of my runs and rides are hilly I reckon that in terms of effort, distance is equivalent to 4 times and ascent approximately equal. That said, it would take me significantly longer to cycle 100 miles than run 25.