P.E Chapter 9-Chronic Adaptation to Training Circulatory System

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jt.mcrae
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97718
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P.E Chapter 9-Chronic Adaptation to Training Circulatory System
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2011-08-20 23:18:37
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Chapter Chronic Adaptation Training Circulatory System
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P.E Chapter 9-Chronic Adaptation to Training Circulatory System
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  1. What are some chronic adaptations of the circulatory system?
    • Increase in left ventricle size and volume
    • Capillarisation of heart muscle
    • Increased a-VO2 difference
    • Lower blood pressure
    • Increase in blood volume and haemoglobin levels
  2. Explain the increase in left ventricle size and vlomue
    • Know as cardiac hypertrophy
    • Greater size equals a greater stroke volume
    • More blood and o2 is being pumped around for the athlete
    • Lower resting heart rate and sub max heart rate
  3. Explain capillarisation of the heart muscle
    There is an increase in blood flow to the heart muscle which allows it to pump blood harder and more efficiently
  4. Explain the increase in a-VO2 difference
    • Trained athletes are able to absorb more o2 from the bloodstream duting exercise
    • Due to increase number of mitochondria in uscel cells
  5. Explain the reduction in blood pressure
    • Due to increase ventricel size and capillarisation of the heart muscle, the heart no longer has to work as hard
    • Reduces strain on the heart
  6. Explain increase blood volum and haemoglobin levels
    • Blood levels may increase by 25%
    • Results in more red blood cells which in turn means that there is more haemoglobin in the blood
    • Equates to a greater amount of o2 being delivered to the muscles

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