Been there, done that After 20 years of competitive xc skiing, I hate running Running (including endless interval trainings and really bad uphill runs with ski poles) is huge part of summer training (because of different muscles, bike is used just for fun and relaxations), so nowadays I try to avoid running as much as possibleSparky1231 said:Try running for 2 hours straight at a high tempo pace, see how you feel the next day.
Ok, so we agree that running is harder. Although I think road running and/or racing is one of the hardest things to do for distance, we'll take that out of the picture.primoz said:Not really Sparky. Running by itself is harder, at least for me. On bike you can go much easier, when cruising. But race is different, and for race, mtb is different for me then running race.
I agree running burns more calories when comparing equal length efforts (from the perspective of time such as an hour racing on the bike and an hour on foot). That is pretty clear from lots of research done. However, when I think of which is "harder" I am thinking from the perspective of suffering and pain during the race. For me, when racing a half-marathon, I would suffer some in the first half of the race, but the real pain would kick in during maybe the last third when you are letting it all hang out and your legs have been pounding the pavement for an extended distance already. In a 5k, it is just pure pain from the starting gun.Okie Dokie said:Gatorback..good points that both are tough..but running still burns more energy per time unit than biking. So taking aside everyones personal anecdotal experiences...and looking at it strictly scientifically running is harder. If you exert 100% effort for 2 hours apiece..you will have burned more calories running.
Another point is that in mtn biking downhills are more or less rest periods for the legs. Running the thighs get beat to hell.