Originally Posted by
adrien
Well, grudgingly, running. But...
You are way more likely to hurt yourself (knees) running, and you won't lose any weight if you can do neither because you blew out a joint.
I ran for a while -- could do 8-9 miles at a time at one point. but then I couldn't go up the stairs without pain for 2 days. Doctor, brilliantly, said "stop running".
Bike is more fun for me anyway, because it's a machine you get to drive, and you can go much, much further. I still run every so often (business trips, etc.), and it reminds me how much I hate it and how much I miss my bike.
+1 Running does more, however,
My knees appreciate bicycling.
I can spend three hours riding pretty easily, I could not run for that long.
Bicycling is more fun.
So do whatever you prefer. I have made my choice.