While fidgeting may be a major part of one’s resting energy use
, thinking uses up energy
, too. The neuron
s in the brain aren’t very good at holding their own energy for long, so glial cell
s in the brain constantly transfer energy to the brain cells, energy taken from the blood
. So if you keep your body steady but try solving a differential equation
, you’ll probably find yourself losing more energy than while sitting and doing nothing at all.
Of-course, TV excites neurons in the primary visual areas, but perhaps that’s, on average, as far as it goes ;). We may lose less calories watching TV because we're not using our brains to think, only to watch...