Hiya,
I'm new here too, just joined last week, I'm 53, and I've found it increasingly difficult to lose weight. I think as we get older our bodies change, and I also think our bodies get used to a particular diet, so we actually need less food as we continue.
The other problem is that as you lose weight, you actually need fewer calories to sustain you, so you get to a point where you have to eat less again, to keep losing. This is all to do with calories in vs calories out, and our basal rate. Even if we stayed in bed all day, we burn a certain amount of calories, and the more we weigh, the more we use, so if you are losing weight on a certain calorie intake, if your weight drops, you won't be using as many calories, so that means you could stop losing weight or even begin to gain.
Hope this helps to explain it a bit.
Dieting is a constant fight with calories in vs calories out, so if you're not losing weight for whatever reason, its because you're not using more calories than you're taking in.
The theory is easy enough, it's putting that theory into practice that is so difficult!
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