Athletes typically ride about 7-8 stages, or until a break point in your blood lactate values has been distinguished. This break point area is known as your lactate threshold. You are said to have crossed lactate threshold when blood lactate concentration increases by at least 1 mmol/L in two consecutive stages.
Middle class. The middle class is a class of people in the middle of a social hierarchy. In Weberian socio-economic terms, the middle class is the broad group of people in contemporary society who fall socio-economically between the working class and upper class. The common measures of what constitutes middle class vary significantly among cultures. A sizable and healthy middle-class can be viewed as a characteristic of a healthy society.
However, it also says the middle class includes three subcategories: 1  Working Class. People in this group typically have blue-collar jobs â the kind where you work with your hands â and are paid on an hourly rather than a salaried basis. 2  Lower-Middle Class.