Our expert says:
Well, on paper, running burns more, you're right. It obviously depends on the person and how hard/fast they are running vs cycling, but you're looking at 15kcal/min for running and maybe 12kcal/min for cycling.
So that hour of running, going 12km, would be equal to more or less 900kcal (there's obviously a bit of a guess here), while the cycling is 750 to 800 kcal.
The thing is, exercise is not solely about calories burned. I think what you're discovering if that you have a very specific strength for running, but perhaps not for cycling. That may be due to muscle specific factors. Cyclcing is a more "static" and local muscle exercise than running, totally different contraction and I think that may be it.
So I think in your case, you could address that cycling by getting fitter for the bike, which will happen, and then you can do 60min on the bike and feel the same. But I think the key is to do what you enjoy, and don't get too hung up on that numbers game, because that's one of many components to exercise!
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