Originally Posted by
Seattle Forrest
Running is a high impact sport. You have to build up your connective tissue. It involves form and economy in ways that don't exist in cycling. Take somebody with a lot of cardiovascular fitness from cycling or swimming or skiing and make them run a marathon, they're going to get sidelined by an injury before they get to 26.2.
If "finish a marathon" involves significant walking, sure, and reasonably fit person can do that.
This is a digression though, cycling is different. Microfractures? What's that?
Right, cycling is even easier. You can coast your way through significant percentages of a ride if you were so inclined. As I said above, it's cool like that. Makes 100+ miles really not that big a deal.