LOWER TDEE THAN PEOPLE WHO HAVE NEVER BEEN OVERWEIGHT

kristinstephenson86
kristinstephenson86 Posts: 27 Member
edited November 2018 in Health and Weight Loss
I have read several studies about how the body makes it more and more difficult for you to lose weight by lowering your daily TDEE so that you have to take in a lower amount of calories than someone who has never once been overweight. Please research the topic first there are several scientific studies. I would like to see opinions about those informed of the issue. If you are just weighing in, but know you don't have all answers that is fine! But its nice to have opinions from those who are familiar with what I am talking about.
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Replies

  • Aaron_K123
    Aaron_K123 Posts: 7,122 Member
    edited November 2018
    TDEE is going to be based on up or body weight your muscle content and your activity level. Other factors if any are minor in comparison and are a matter of case studies or rare exceptions based on circumstances that are neither common or sustainable.

    If what you actually mean is BMR not TDEE then practically speaking if you want to raise your BMR without putting on significant fat the way to do it is to increase your activity, increase your caloric intake and put on some weight in the form of building some muscle.
  • NorthCascades
    NorthCascades Posts: 10,970 Member
    This isn't what you mean but a study showed that people in an energy deficit (aka losing weight) tend to fidget less and walk less, unconsciously. Moving less lowers your TDEE. Of course if you're aware of that, or just trying to be active while you lose weight, then you can choose to raise your TDEE.
  • Thanks everyone! And yes I mean BMR. And I ask because it's unmotivating thinking your body is going to make you miserable the whole way. Makes you want to give up.
  • annaskiski
    annaskiski Posts: 1,212 Member
    Short term Changes:

    Adaptation to Diet and Fat Loss

    When someone reduces food intake or in response to dieting, there is a fairly stereotyped response in the above systems. Due to less total food being eaten, less of the fullness hormones such as CCK, PYY, etc. are released. Ghrelin levels are also increased overall and don't decrease as much after a meal. Leptin, released primarily from fat cells, decreases which means that the brain responds even less to those hormone signals. The increase in leptin and decrease in ghrelin, along with the other hormonal changes, has a potent overall effect which is to increase appetite and hunger along with decreasing how full people get after a meal (at the extremes, dieters may be hungry shortly after finishing the previous meal). Those same hormonal changes also impact on the hedonic system with DA levels dropping (leptin plays a major role here) along with other changes. This makes tasty foods taste even better (think of how much better a cookie or piece of cake tastes when you're hungry) and dieters even notice and pay attention to palatable foods that much more easily. These changes can make dietary adherence more difficult.

    In addition to any short term changes in hunger, there are also longer term changes as fat is lost. In overweight individuals, for example, hunger increases by 5% and fullness decreases by 3% for every 2.2 lbs (1kg) of fat lost (13). The more fat is lost, the greater the effect. Although not well studied at the extremes of low BF%, hunger and appetite may be relentlessly high. In the Minnesota study the men became absolutely obsessed with food, talking about little else, near the end of the diet. This can be seen online in the behavior of lean athletes who are dieting who talk about looking at or posting pictures of tasty foods (which they call food porn) on social media.

    Lyle McDonald. The Women's Book (Kindle Locations 3064-3066). Lyle McDonald.


  • annaskiski
    annaskiski Posts: 1,212 Member
    The Adaptive Decrease in TDEE Although I will look at the individual components below, I want to start by looking at the size of the adaptive decrease in TDEE first. As with the changes in hunger, much of this is determined by initial and ending BF% along with the total amount of weight and fat that is lost. In the case of the Category 3 dieter losing a moderate amount of weight, the total adaptive reduction in TDEE might be no more than 15% below the predicted level which might amount to 150-250 calories per day. This can range from zero to 500 calories per person with people showing the larger adaptive drop both losing fat more slowly and being more likely to regain it after the diet is over. At the extremes of fat loss, much larger drops have been measured. In the Minnesota study, the men showed a total drop in TDEE of 50-55% or 1800 calories per day (and large variance between the men) as they lost 25% of their total weight (and an enormous amount of LBM). This means that 25-30% of the total drop, or 450-600 calories, was due to the adaptive component while the other 1200-1350 calorie drop was due to the weight loss.

    Lyle McDonald. The Women's Book (Kindle Locations 3112-3113). Lyle McDonald.

  • annaskiski
    annaskiski Posts: 1,212 Member
    Long section on RMR:

    Looking at the magnitude of the drop, a primary factor is still BF%. In the Category 3 individual losing a moderate amount of weight, the total adaptive drop may be no more than 150-250 calories. Of this decrease, perhaps 10-15% is due to the changes in RMR and this amounts to roughly 15-40 calories per day, an insignificantly small number. Even the dieter who experiences a 500 calorie total decrease will still only see the RMR drop making up 50-70 calories per day.

    Lyle McDonald. The Women's Book (Kindle Locations 3139-3142). Lyle McDonald.