All wildlife records in the speed of energy metabolism belong to small birds. For example, birds weighing 20-30 g spend about 1 kcal per hour, if at this time they feed, clean feathers, sleep, fly from a branch to a branch. About 25 kcal is obtained per day.
If a person had the same high level of exchange, then his energy would be simply incredible. In order to spend it, any of us would have to raise a load weighing 420 kg to a height of 1 meter within a day 80 thousand times.