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Originally Posted by HiMet4590 only way i see this working is if you've been in a state of ketosis for an extended period of time. Everyones bodies are trained to run on sugars nowadays, even though we are supposed to run off of fat. So, in 5 days of no carbs our bodies are totally converted to running off of fat??? i cant say i believe that, seems like the very second you start your "carb up" your body switches right back to sugars and kills the ketones and you dont achieve the ketones again until the end of the week and then you just kill them again with the carb up. So, for the majority of the week your body is looking for sugars for fuel and since they arent in your daily diet its just going to steal them from your hard earned muscle, because i also have a hard time believing a weekend of carbs will make enough glycogen to last throughout the week or even the next day no matter how big of an insulin spike you get
i just cant see the logic in this |
1. Bodies aren't "trained" to run on sugars. The body preferentially will use carbohydrates when they are available and will store some percentage thereof as glycogen to use for spurts of activity.
2. No, the body does not run purely off of fat in five days. The brain will run off of progressively more ketones until about the three week point where up to around 70 percent of the energy the brain requires is supplied by ketones and the remainder is provided by glucose. The rest of the body will run off of the breakdown of FFAs.
3. During the carb up the body does not immediately start to switch it's gears to only using glucose, during a carb up the body will still burn fat more so than on a regular diet.
4. The reenterance into ketosis does not take another week full ketosis can be reachieved within 24-48 hours of the carb up.
5. The carb up super compensates glycogen levels far beyond that of normal levels.
The only period where the body will be more dependent on carbs than fats is the initial first week where ketosis is induced. And glucose is a part of the daily diet, on the low end 20-30 carbohydrates and on the higher end up to fifty a day.