Chapter 6 Adaptations To Aerobic Endurance Trainijg Programs Flashcards
What is the Frank-Starling mechanism?
As the ventricles of the heart stretch, they contract more forcefully
How is electrical current conducted through the heart?
From the SA node to the AV node to the AV bundle to the Purkinje fibers
What is the range of blood volume delivered per minute from cardiac output?
5-25L/min
What is the difference between rest in cardiac output between an average person and an endurance trained athlete?
Not much
What is a rough estimate for maximal cardiac output for an endurance trained athlete?
~40 L/min
About how much less stroke, volume and cardiac output do females have compared to men?
~25%
What is one MET?
3.5 mL/kg/min
What is a metabolic equivalent as it relates to oxygen?
Resting oxygen uptake
What is running at a nine minute mile approximate in METs?
11.0
What is average VO2max for a college age male?
~40mL/kg/min
What is a High VO2max, of a cross-country runner, for example?
60-65 mL/kg/min
How does the unit for VO2max compare to METs?
It is the same
How long do altitude training adaptations take?
About 14 days
What is mean arterial pressure?
Average blood pressure throughout the cardiac cycle
What is equation for mean arterial pressure?
[(SBP - DBP) / 3] + DBP in mmHg
What is the equation for the rate pressure product?
HR x Systolic blood pressure
What are two enzymes that are upregulated because of adaptation to aerobic training?
PFK (glycolysis) and oxaloacetate (Krebs cycle)
How does the amount of fat burned at submaximal heart rate change with adaptation to aerobic training?
A higher percentage of fat will be burned at submaximal heart rate
How is blood lactate affected at submaximal intensity with adaptation to aerobic training?
Decreased blood lactate at submaximal intensity
How is running economy affected by adaptation to aerobic training?
Running economy improves
