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.
There is no standard definition, and in fact, an overwhelming majority of Americans say they are middle class or upper-middle class or working class in public opinion polls. Hardly anybody considers themselves lower class or upper class in America. Itâs possible to come up with a definition of what constitutes middle income, but it will depend on how large a slice of the middle one prefers.