What is the point of a Refeed?

Well in essence this is how it works. If your body is in keto the entire week and its burning fat for energy except for your workouts that are high intensity and require the use of carbs all of your glycogen stores are burnt up. Doing this refeed allows your body to replenish your glycogen levels and even supercompensates to some degree and stores more glycogen. The reason that you burn fat while doing this is because your body is already in fat burning mode. When its in fat burning mode its not gona just switch over to burning carbs as a source of energy as long as your refeed is kept shorter. They should be under 24 hours for most people but the lower bodyfat you get the more you can refeed. What happends when you take in all these carbs is your body basically goes holy shit I cant process all of this I need to get rid of it. So you body burns calories to get rid of all of the excess calories that you ingested. Since your body is in fat burning mode it uses fat as the energy source to get rid of these calories.