What Have the Laboratory Studies of Endurance on Stationary Bicycles

question 5

Multiple Choice

What have the laboratory studies of endurance on stationary bicycles found regarding caffeine consumption?

• A) Caffeine can significantly improve work output at doses of 300-500 mg
• B) Caffeine can double endurance at 80 mg, the amount in a can of Red Bull
• C) Caffeine does not appear to improve performance
• D) Caffeine does not work as well as it did in studies of marathon runners

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Definitions:

Output

Represents the total amount of goods and services produced by an economy over a specific period.

Average Variable Cost

The total variable costs (costs that change with the amount of output produced) divided by the quantity of output produced.

Fixed Cost

Costs that do not vary with the level of output or activity, such as rent or salaries.

Marginal Cost

The increased cost incurred from making one more unit of a product or service.