I would assume that thinking does take calories, and so does having an impulse and then overriding it.
Kurzban on that:
...Clarke and Sokoloff remarked way back in the nineties that a “fashionable” view “equates concentrated mental effort with mental work,” but that “there appears to be no increased energy utilization by the brain during such pro-cesses.”52 A more recent review concluded that it is “unlikely that the blood glucose changes observed during and after a difficult cognitive task are due to increased brain glucose uptake.”53
Now, I'm not an expert on the brain's consumption of glucose, but you don't actually have to be an expert physiologist to not
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.