>>5631744Wrong. Your body uses ~4000 joules of energy simply being alive for 60 seconds. Compare this to running for an hour which burns ~3000 joules total.
Simply being alive for a day burns more energy than several marathons put together.
Exercise can increase your metabolism which helps to burn a bit more weight, but past that you are never going to be able to run far enough to lose weight simply by running about the place. Instead you have to balance the equation at the other end - the input.