Not just by doing it once, like you've been saying. You need to keep doing it-- continually reduce your caloric intake and/or increase your activity. If you don't, then you *will* slowly regain the fat you lost. The body will act to preserve its fat stores.Except that nothing you said after that contradicted me. You seem to think that because the body combats what it percieves as starvation, you cannot lose weight by moderate restriction of caloric intake and moderate increase in activity, when the evidence you presented says no such thing.
Also, with all due respect, your target goals are way off. 2-4 lbs a week is insane, and cannot be maintained for any lengthy period, healthily. You can't burn more than 3.5 lbs of fat per week under a strict fast. If you're losing 2-4 lbs a week, it cannot all be fat-- and fat loss is the goal.
The problem is that you can't just reduce your calories and increase your activity once. You need to keep doing it-- once you plateau, you need to alter things even more. Or, you can switch over to an even healthier diet, which promotes fitness over weight loss. At any event, you certainly cannot hope to maintain a weight loss of 2-4 lbs a week and expect to remain healthy!I say you can lose fat by not eating so much and by raising activity. [Actually, I say that as long as you take in less than you use, you lose fat.] If the problem you have with that is temporary plateaus and "what happens if you eat nothing up raw sugar," then I think my point stands.
Think if it this way. Everyone you know tells you to eat quickly. From an early age, we're taught to "eat up before it gets cold!" Media images have people eating quickly and going on the run. In short, our entire culture reinforces the idea that eating fast is a good thing.Or having the willpower to not eat really quickly. That doesn't require a huge cultural shift; just willpower. I mean, are you really suggesting willpower isn't enough to lose fat because people cannot make themselves eat more slowly without shifting their entire culture?
Willpower alone cannot combat a huge cultural movement. If you want to take a full hour to eat your lunch-- the healthier choice-- and your boss tells you that you only have thirty minutes, how can willpower overcome that obstacle?
*raises hand*No, fat people are lazy. In 99 out of 100 cases, people are fat because they're too lazy to get off their fat asses and do something about being fat. People almost always know what they need to do, and it's not "plateaus" or "strict vegetarianism" that's keeping them fat: it's being fat lazy Americans. They sit on their asses, eat way too much really bad food, and then complain that losing weight is hard. Anyone who has walked an hour a day, every day, for six months, and not lost any fat [while maintaining a healthy diet] can come and bitch to me about how hard it is to stop being fat. Anyone else needs to put up or shut up.
I train in martial arts. I also have a toddler, who seems to have skipped over walking and gone straight to running. I have to keep up with her, keep up my training, and keep up with everything else. My BMI is absolutely outrageous-- 39 or 40!-- but my body fat percentage is only 24%, which isn't that bad for a man my age. By the BMI standards, I'm grossly obese. By body fat standards, I'm somewhat overweight.
I've had nutritionists and dieticians go over my diet, and I've studied this subject extensively. (Got a perfect 4.0 in Nutrition, actually.) While there are many things I could do to improve my overall health, the fact is that I haven't lost much fat despite increasing my excercise and reducing my diet. And really, there's absolutely no reason for me to do so-- as long as I keep up my excercise, and maintain my level of fitness, I'll be better off than dropping a bunch of pounds only to put them back on later.
Ironically, the reverse is true. The more dramatically you cut your calories, the more rapid and extreme the fat-storage efforts become. The added excercise only counteracts the slowing metabolism to a degree-- it's the resting rate that matters, and that's the rate we spend most of our time at. You can counteract this by adding lean muscle, but that actually involves *gaining* weight.Isn't the added exercise exercise going to counteract the slowing metabolism?And doesn't it depend on how much you have cut your calories by? If you cut them from say 3,500 to 2,500, then it seems like you will be losing weight for quite a while till you get to the point where 2,500 is enough to meet your needs. You'd lose about 90 lbs anyway.
As for 90 lbs... that's one hell of an unreasonable goal for most people. If you weigh 200 lbs and need to lose weight, you need to aim for a 5-10% loss in the first year-- in other words, about 10-20 lbs. That's less than a pound per week! You will lose more initially, then slow down a lot. For our hypothetical 200-lb individual, 5'0" with a target weight of 110 lbs, it should take at least 3.5 years to reach that point. (Possibly longer; at 10 lbs per year it could take almost a decade!) Nothing you have to do for a decade can be nearly as trivial as 32 makes it sound.