Nothing significant
You don't gain calories from sitting. You gain calories from eating.
To gain one pound is 3,500 calories.
well it is artaficial flavor. (some are) you barly gain calories. probally 0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 calories
That would be very unlikely, because when you burn more calories than you eat you tned to lose weight and people usually only gain weight when they have excess calories that are not being used by the body.
If you gain muscle while exercising, you can gain weight, otherwise it is pretty hard to, unless you are eating too much fatty foods or too many calories.
Fast food is typically very high in calories (the average fast food meal normally has about 1,000 calories), and any calories a person doesn't burn off ends up leading to weight gain. If they exercised the calories off, then it wouldn't make them gain weight. But most people normally don't burn all the calories they ate at that meal. However, fast food every once in a while is fine, and won't make you gain.
You gain weight by taking in more calories than you use. Eat fats or sugar (i.e. nuts and fruits) you gain calories, if you do not use the energy produced by those calories you gain weight, it is stored as fat in your body.
Gain, stupid.
If you eat more calories than your body burns in a day, you will gain weight on your adderall xr vacation. This website will help you out. http://walking.about.com/cs/calories/l/blcalcalc.htm
The short answer is 7700 extra calories will make you gain 1kg of fat
You gain weight when you consume more calories than your body burns. Alcohol has a lot of calories. If you don't increase the amount of exercise you get to balance the increase in calories you will gain weight from drinking.