OK then let's lock a bunch of us in a vacuum thermos like in that "DEVS" show, have them eat a reasonable diet of 2k calories a day, have them walk on hamster w

OK then let's lock a bunch of us in a vacuum thermos like in that "DEVS" show, have them eat a reasonable diet of 2k calories a day, have them walk on hamster wheels and hope they will produce > 2k calories worth of energy. Scale out, profit! Spoiler alert, this will not work.