Originally Posted by hhnngg1

Running since it's weight bearing, seems to automatically push you into at least that baseline metabolism increasing effort. It's why running can be so painful to a new person, but also why it's pretty unusual for any decent runner to be even mildly fatty - the fat tends to fly off with running with the baseline metabolic changes in the legs. It's not because of the megamiles run - cyclists routinely put in more calories burned than runners of similar ability, but the impact per stride is so high in running that even leisurely runs cause a significant baseline metabolic acceleration.