Besides the obvious increased caloric expenditure during aerobic exercise, long-term aerobic exercise appears to change what sources of energy we use during such activity. Studies examining trained and untrained people exercising have found that trained participants will rely more on stored fat during exercise than untrained ones. Additionally, you will continue to burn an increased number of calories for about an hour or so after stopping exercise (as your body uses energy to help recover).
you use a calorimeter. every 4000 calories is about 1 pound of weight. Answer: I'm astounded at the above answer. In all my life, and the past 27 years interested in nutrition, I've never heard of a calorimeter. I'm Canadian. I know Canada often lags behind the U.S., but for many years I've been counting calories by looking at nutrition charts on food and beverage packages or by looking at nutrient charts in nutrition books. This is easier said than done when eating a normal diet of a wide variety of foods. Counting calories is easy when living on a boring, probably unhealthy diet of maybe 1 food, such as 180 grams of granola (=840 calories), X 3 meals daily, = 2,520 calories. I've recently been eating such a wide variety of foods, that it's become too much of a nuisance to bother to add up all calories I've consumed every day, while trying to gain weight. But I still write down what I've eaten and drank and my new weight every day.
a calorie is equal to the amount of energy/heat needed to heat 1 gram of water i degree Celsius. Keep in mind that Calories (capital c) is equal to 1,000 calories
The foods that are at the top of the pyramid (fats) are the foods that you shouldn't eat so much of (that's why it's so small). The foods at the bottom of the pyramid (carbs) they recommend you eat the most of (that's why it's so big).
sugar, carbs u name it