In an Elite Marathon Runner, Performance in a Marathon Race

question 6

Multiple Choice

In an elite marathon runner, performance in a marathon race is limited by a number of factors. Among world class marathon runners, which of the following factors is considered to be critical for a high level of performance?

• A) Muscle ATP content
• B) Adequate fat stores
• C) High muscle glycogen content
• D) High muscle oxidative capacity
• E) High percentage of type II muscle fibers

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Definitions:

Blood Flow

The continuous circulation of blood in the cardiovascular system, delivering nutrients and oxygen to cells and removing waste products.

Resistance

The ability of an organism, material, or system to withstand or ward off a particular condition, substance, or force.

Cardiac Output

The volume of blood pumped by the left ventricle into the aorta in 1 minute.

Stroke Volume

The volume of blood pumped by one ventricle during one contraction.