To the poster, I'm not sure being lazy has anything to do with your height. That is much more genetics. I know that when my sons or I or husband are kind of in a rut, we feel like we aren't doing anything either for ourselves (our bodies like exercise) or our life (like work that we need to do (me: house work and that fun stuff and my kids: moving ahead in school work, my husband: job related extra things or house projects, etc.). It makes us all feel better when we 'get to it'. Make a list. You can overcome anything and that includes even being lethargic or reluctant to do what you know you'd like to or should do or being lazy.
Since I don't know what you mean when you describe this way, it appears you feel you have some control over it and I'd just exert your control over yourself and do more of what you feel you probably should be doing. :)))
Good luck
I've been thinking about this, and your characterization of yourself as "lazy" in your title. A lot of the time a person isn't lazy when they are doing something they like or care about, or have other motivation to do (such as when on a crash project at work that absolutely has to get done). It might be that if you can find a way to shift away from less motivating parts of your life, finding something you care about to do that gets you moving, you will start to walk off the weight without feeling like you are making yourself exercise. Sitting around can sap you of motivation and makes it easier to eat, which is depressing and causes you to feel even more uninterested in getting up and doing things. Try finding something more interesting or more fun, even if you cannot do it every single day try to change it up with your activities so you are out and doing something different.
Have you been tested for any medical issues that might cause weight gain or inability to lose? The first things that come to mind are hypothyroidism or type II diabetes. Just because you're only 25 doesn't mean you can't have a medical problem. The first thing you should do is talk to your doctor and ask to get your thyroid tested... ask for Free T4, Free T3 and TSH. There are medications that can help correct hypothyroidism.
You could also have something called insulin resistance, in which your body doesn't process certain carbohydrates correctly. That's a simple way to put it, but you can talk to your doctor and there are ways to correct this as well.
Stress can produce high cortisol levels, which can also be tested and treated.
It's true that making small changes can have a big impact.
Tell us what your diet and exercise level is like and what you've done so far to try and change it. And how heavy are you?
Hi, Jack, one thing to do is to fight the hopeless attitude. It really is possible to reduce. To test this, you can add small amounts more of activity (park the car a little further away or get off the bus one stop before the place where you are going, climb one flight of stairs daily, etc. depending on what is available) while also stopping yourself from one eating thing. That could be cutting out one dessert, or only having one of something when you usually have two, or cutting back on a sweet drink. Then see after a couple of weeks of this, if you can tell a difference when weighing on the scale. If you can see even a moderate change in your weight (we aim for a pound a week around here) you will be encouraged and see that being fat has a cure. If you're out of the habit of those two things (exercising, even moderately, and being able to tell yourself "no" to some food things) try getting back into the habit. You might right now feel like you need a more immediate fix, but seriously, even the small steps add up.