mrsnattybulking wrote: »
I don't understand the part about the thermic effect of digesting protein. If that's the case why wouldn't the low carb group lose more than the non low carb group under controlled circumstances... same cals etc? Like I understand they were all capped at 100g protein but if one were to consume MORE protein in relation to the same cals wouldn't they have a deeper deficit over time?
About the only time that TEF can become considerable is when you replace carbohydrates or fat with protein. For every 100 calories of carbs/fat replaced with protein, you’d expect to burn about 25 calories more (30 cal for protein vs. 3-6 for carbs/fat). So a doubling of protein from 60 to 120 grams/day might increase TEF by 80 calories/day. Triple it to 180 grams/day and TEF could increase by 150 calories. The 20-30% TEF of protein can become even more significant at extreme intakes. However, for the most part, such extreme intakes aren’t practical or used outside of the bodybuilding subculture. In all but the most extreme diets, protein stays fairly static and carbs and fats are shuffled around; the effect is typically minimal in terms of TEF.
ammo7 wrote: »
I have been okay with the fact that my TDEE will be lower as I continue to lose some more weight - that makes sense to me purely because I will be less heavy, so my body is doing less work to move me around, and because of increased exercise efficiency. However, I was worried about what he was saying in regards to the "greater than predicted decrease in resting energy expenditure of 250 to 300 calories per day." That really does seem like a lot - I would appreciate if someone could link me to more information about this.
I am also confused about the point he was making with the Oprah Effect. It seemed to me that he was including it as anecdotal evidence that being in a deficit can have a huge negative impact on metabolism.
But he did not address that those 10 pounds she gained would have comprised of increased water retention as she returned to solid foods; or the fact that a previously-obese woman who deprived herself of food for so long said she "returned to real food" which could easily have meant that she returned to her old habits that led to that obesity (plus maybe even a massive increase in food to satisfy cravings after so long!) which would have had a big impact on the scale.
AnvilHead wrote: »
More in depth discussion of TEF here from another source (Lyle McDonald): http://www.bodyrecomposition.com/fat-loss/metabolic-rate-overview.html
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