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.
First, although a country may be able to have an absolute advantage in producing very good, it's not possible for a country to have a comparative advantage in producing every good. In the previous example, China had an absolute advantage in both goods -- 2 pounds of rice versus 1 pound of rice per hour and 3 bananas versus 2 bananas per hour -- but only had a comparative advantage in producing rice.