Can someone please explain this to me?

sucks doesn't it. Genetic lottery, the fact you are 10 years older. She is obviously at a calorie deficit, she might be burning lean muscle though and could end up skinny fat.

Honestly? I wouldn't worry about anybody else and just be satisfied that you are making progress.

"If you compare yourself with others, you may become vain and bitter; for always there will be greater and lesser persons than yourself." ---Desiderata

When you get down to calculating, watching the amount of calories you eat is usually enough for anyone to lose weight regardless of exercising or not. Though by exercising you are keeping more muscle than a person who is going solely on a diet but nothing else.

Her age may have something to do with. Your metabolism slows as you get older, so maybe it's taking a little more effort for you to lose weight. BUT like the previous poster said, I also believe that the slower the weight comes off, the longer it will stay off, so keep doing what you're doing. I'll also bet that you're healthier than your sister even if she weighs less.

Her age is definately a factor. And each one of us is different - she may have a high/higher metabolism. And she may not be "working out" but she may be more active during the day which can burn more calories.

- Do what you can to boost your metabolism (build muscle, drink green tea, eat often, eat protein, etc.)
- Workout but be active as much as possible during the day (I have a Body Media Fit Link and I have am overall higher calorie burn when I workout AND focus on being active the rest of the day
- Log all calories

And lastly... don't compare yourself to anyone else (even though it's difficult). Be the best "You" you can be. As someone else said, she may be skinny, but is she healthy and toned/fit?

Congrats on how far you've come. Enjoy your journey!

~j

Everyone's BMR (Basal Metabolic Rate) is different. Its how many calories you burn in a day, simply standing still. Considering your diet and training, you are gaining muscle which tends to be denser than simply adding on fat, meaning it weighs more. So therefore you can workout on a regular and really lose 10 pounds but since you gained 5 pounds in muscle, it will look as if you barely lost anything. I usually stick to the method of eating only 200-300 calories over my BMR and then burning that amount in calories plus 1000, maintaining your same daily work out schedule. Meaning on a daily you're eating around 2000 calories and burning 3000.

For BMR, weight, height, and age, play a major role into how much you actually burn on a regular. If you were my age, weighted 170 lbs, and stood 5' 11" then you would burn about 1800 calories/day. A person of the same but 10 lbs lighter would only burn 1700 calories/day. However, if the same person was just 5 inches taller, at 170 lbs, they would burn 1800 calories/day as well. Age barely has a factor in your BMR and a 10 year age difference, would only change your burn by 50+ calories.

Now the thing to note about beer is that most beers add about 100 - 300 calories to your daily diet and a light beer has nearly less than 5 and almost zero grams of fat in most cases. Beer also fills you up. You can consume several cans and only a few calories of food, and still meet your BMR. The "belly fat" and extra water it adds will just as easily go away, if you eat on a diet, working to not consume over your BMR, even without exercise.

Its not about what you eat its about how much you take in and how much you burn off. On most days I bike 40 to 60 miles/day. And I eat EVERYTHING. Pizza, 3 McDonalds Double Cheeseburgers and a Medium Fry, Fried Rice... But I stick to my rule and always burn 1000 more than my intake. And days I don't excercise I know I can eat this until I reach around 1300 calories for the day. Because I will still have another 800 calories that my body will burn off by simply laying in bed watching cartoons.

You can find more about BMR under APPS>BMR.

Honestly? I wouldn't worry about anybody else and just be satisfied that you are making progress.

"If you compare yourself with others, you may become vain and bitter; for always there will be greater and lesser persons than yourself." ---Desiderata

^^^ This! So many times in the past with Weight Watchers meetings I would get frustrated and jealous of other people's success or the fact that they made "life" after losing 10 or 20 pounds while I had closer to 200 to lose. I still struggle sometimes, but I am really trying to just focus on me. What happens to them has nothing to do with me --

you do you and I'll do me

So. . you're saying I can still drink beer!?

Congratulations on your weight loss!

I am often irritated by the same ordeal! I can eat healthy and increase my activity and lose next to nothing. I can watch a friend drop weight with little effort. Genetics, body type, and your metabolism are probably working more in her favor. My family genetically holds weight. I've also found that stressing over weight loss tends to slow me down. Its weird, different stressors do different things to me.

Even though you're eating healthier, are you eating what you need? For instance, I lose faster when I limit carbs, but a high protein diet kills my gut (IBS). However, my friend can limit carbs and eat nothing but protein and drop pounds quickly. Pay attention to the breakdown on your daily food report, and see if you can't figure out a good combination for yourself.

Exercise doesn't contribute as much to weight loss as most people think. Remember the saying, "Get fit in the gym, lose weight in the kitchen."

But I agree with everyone else: don't compare your progress with others'; focus on your own success!