Aerobic vs. Anaerobic. To understand the relationship between weights and calories, you need to know the difference between aerobic and anaerobic exercise. Sustained aerobic exercise, like steady jogging or cycling, is low intensity and can thus be done for a longer period of time.
absolute advantage. In the theory of international trade, a country or firm has an absolute advantage if it can produce a product (good or service) more 'efficiently' (cheaply) than others. First suggested by the UK economist Adam Smith (1723-90) as an extension of his division of labor doctrine. See also absolute cost advantage and competitive advantage.
The theory of comparative advantage is essentially the idea that even though one entity may be better at producing a good than a second entity, it still may be beneficial to trade with the second entity if they have lower opportunity costs. Comparative advantage is most easily explained with an example. Clearly Country A has an absolute advantage in the production of both wheat and TV's. In the given time frame Country A can produce four times as much wheat or twice as many TV's.