Body Resistant, misconception or fact?

No, it's not true. How would it? Body fat is energy. When you eat too little then your body takes the energy stored as fat to survive. It would not make evolutionary sense to rather die than take energy from fat stores in periods of famine. Your body wants to survive and does everything possible to do so.

Let me say that I agree with the others: What matters for weight loss is calorie balance, the relationship between calories eaten and calories spent via being a living body that moves. Further, I agree that it's impossible to know what others *really* do, and they may be inaccurate even if they believe every word they say (like they leave out the pretty-frequent times they skipped breakfast because they were running late, or the touch football with the kids on weekends, or whatever.)

I also think it's possible for us to misunderstand or misinterpret our own situation, in the form of things like imprecise logging (there's a learning curve!), or thinking of what we do as being our normal practices but forgetting or glossing over some "minor" unusual things like that weekend when it got too hard so we over-indulged, or the time(s) we felt like we were coming down with something or got to bed late, so slept later and skipped the morning workout . . . or simply didn't get enough sleep/nutrition/calories so dragged through the day.

However . . . a couple of things.

I do think it's possible, via cycles of extreme yo-yo dieting, to train one's body to expect famine, and slow things down to conserve energy. The effect would be small, but potentially non-zero. The mechanisms may be subtle. They would be things like reduced spontaneous movement (fidgeting, basically), perhaps sitting more when we might otherwise have stood or moved, maybe generally resting/sleeping a bit more, perhaps feeling cold more often, slowed hair/nails growth, etc.

Some of those things can become habits that persist after the diet. For example, if one reduces some regular non-exercise hobby activity - gardening, say, or playing drums - it may feel like it happened because on "lost interest" or "didn't have time anymore", and not be resumed again. If we get used to watching TV or playing computer games more because we felt dragged out by evening, we might continue those TV/gaming habits because we're enjoying them, and they're now habits.

Besides that, multiple cycles of extreme yo-yo dieting can result in losing unnecessarily much muscle mass alongside fat loss. While a pound of muscle burns slightly more calories at rest than a pound of fat does, that effect is tiny, like 4 extra calories per pound per day. But I suspect that a weaker person is going to find various forms of movement less easy, less fun, and probably do them less. If weight regain happens, they're then moving a bigger body with that reduced muscle, perhaps making it even less pleasant to move, so movement less likely. (Starts to sound like it could become a slow negative spiral, eh?)

A pattern I've seen, among women my age (65) who've done many cycles of extreme yo-yo dieting over decades is this: Go on a very low calorie diet (VLCD), probably a faddy one with some sub-optimal nutrition. Often, it's been some salad-intensive thing, lower protein, low fat. To that, add a bunch of cardio (aerobic dance was a classic example), and no strength training (wouldn't want to "get bulky"). Obviously, that's going to be unsustainable for very long. So, lose maybe 10-20 pounds (unnecessarily much of which was muscle), give up, "go back to normal", regain. "Normal" eating is often high carb, high fat, still low protein, low nutrient generally, and exercise often drops out of the picture entirely. That's like a custom-designed recipe for losing muscle mass, regaining fat. Probable result, after multiple cycles: Getting less capable/active over time, with down-spiraling body composition.

The good news is this: All of this is under our near-total control. We don't have to try to lose weight so fast that it's physically destructive and stressful. We can consciously strive to get enough nutrition (especially protein) in those adequate calories. We can pursue a well-rounding exercise program, one we enjoy that's sustainable, ideally with both cardiovascular and strength challenge to it. We can consciously put more movement into our day, in non-exercise ways. Some of the things that had been lost can be regained, via effort.

So . . . might your cycles of yo-yo dieting have you losing slower than others who didn't do that sort of thing? Perhaps by a bit. But there's still some calorie level where you'll lose weight (kg a month sounds OK, to me). Use those calories to get overall good nutrition.

Try to get more movement into your daily life. Consider this thread:

http://community.myfitnesspal.com/en/discussion/10610953/neat-improvement-strategies-to-improve-weight-loss/p1

Keep going with your cardio/strength exercise; keep it always a little challenging, but not exhausting (that's counter-productive). You can make progress. Comparing yourself with others is not helpful. You are where you are, and you can do what you can do. The only reason to focus on obstacles (like a "slow metabolism", which isn't mostly really a real thing) is to figure out how to get over, around, through or otherwise past them. Otherwise, they're just a reason to feel bad emotionally, or an excuse to give up altogether.

This article is decent, and evidence-based:

https://examine.com/nutrition/is-my-slow-metabolism-stalling-my-weight-loss/

Here's the thing:

What is their job? What is their life circumstance? What are these people doing all day long and eating all day long? The gym and self-reporting of meals are not the whole story, EVER.

If you ask me my workout routine I'm going to tell you I do the occasional 10 minute youtube workout video a couple of times a week and lift some weights maybe once a week for another 10 minutes. I won't tell you about the running because I"m only TRYING to get into it and it's for fun, anyway.

My LIFESTYLE however involves a LOT of moving around - like 10-12 hours or so a week of walking, sprinting, or hiking. It isn't exercise routine it's what I do in life. I also sit around and jiggle my leg and fidget and live 3 flights of stairs up from the street to the front door AND my bathroom is up a flight of stairs from my living room. Sound inconsequential? Sure, but they're all calories burned. (Also, I pee a lot. That's a lot of stair climbing)

If you ask me what I've eaten today I'd tell you two cups of coffee with milk and hot chocolate, cottage cheese with fruit, candy and chips. What you *don't* see is that the milk is unsweeneded almond milk, the hot chocolate is reduced calorie (meaning each cup of coffee was 70 calories) and the candy and chips were a combined 200 calories (look I haven't eaten real food yet, I've been busy). If you're doing math assuming standards the coffee is 200ish calories each, 200 calorie candy bar and I dunno 300 calories of chips.

This stuff makes a big difference in perception and if you don't live with someone 24/7 you can't know and they can't self report stuff like 'time they're walking around their house' and 'how much do they fidget' and 'what do they do while they brush their teeth, stand there or wander around'.

The BRAIN is resistant to weight loss in a way dt changes that drive appetite https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2926239/. There are also changes that seem to slow your rmr slightly and change skeletal muscle efficiency.https://pubmed.ncbi.nlm.nih.gov/7632212/.

That said, it seems to be individual how hard these compensation mechanism kick in. What we see in the research is, people who maintain long term weight loss is, DIETARY AND EXERCISE compliance. https://pubmed.ncbi.nlm.nih.gov/19828901/ . Basically, find a lifestyle that helps you overcome these mechanisms and stick to it.
There... That will be $99.99 US..... I take cash, precious metals, or indentured servitude.... lol

So you've lost 0.78lbs a week and at your current weight 0.5% of body weight a week would be slower than that at 0.735lbs a week.

You have done great and you sound to me like someone who is ready to self sabotage out of a misguided notion that you should have done better.

How many of your **kitten** friends have maintained their weight loss for 3, 5, or 10 years? What is then the relevance of the various diet regiments they follow and of the short term success they see?

You have lost 50 lbs. More than 50 lbs. You are way healthier than before your loss.

a) be happy

b) worry more about maintaining the weight loss than about the bonus of losing more.

Time will pass either way. It will pass either with you working sustainably towards small improvements, or with you fighting tooth and nail and being unhappy.

c) most people who feel they are not losing fast enough are probably NOT currently engaging in what they envision their final post weight loss type of eating, moving, and exercise will look like.

it is past time for you to consider what your future take on eating, moving, and exercising will look like.

If you currently plan on making major changes when you get to maintenance after a major weight loss... I would give that a double think to ensure it's a good idea.

You're better off introducing any changes while you're still attempting to lose weight and you have the extra deficit push to help your experiment.

Since your op seems, I feel, to imply that you are engaging in more exercise activity than what would make your happy, I remind you that the survey of the weight loss registry participants (peopke who have lost and maintained the loss of a lot of weight) seems to indicate that the majority of long-term maintainers have chosen to incorporate at least one hour of movement in their days with a majority again engaging in something as basic as walking--not necessarily ZX90-boot-spin-Bumba-till i drop, or what have you.