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Teaser for September CEU presentation to TWU fitness staff.

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  1. 1. Cardiovascular Physiology<br />
  2. 2. Overview<br />Anatomy and Background Information<br />Controlling Respiration<br />Heart Rate and Cardiac Output<br />Effects of Disease<br />Aerobic Exercise<br />
  3. 3. Gas Exchange and Transport<br />Partial Pressure<br />Transporting Oxygen in Blood<br />Transporting Carbon Dioxide in Blood<br />
  4. 4. Partial Pressure<br />Body’s supply of oxygen depends upon the concentration and pressure of oxygen in ambient air.<br />Concentration in ambient air:<br />Oxygen 20.93%<br />Nitrogen 79.04%<br />Carbon Dioxide 0.03%<br />At sea level, the pressure of the above is sufficient to raise a column of mercury to a height of 760 mm<br />
  5. 5. Cardiac Output - Exercise<br />Cardiac output increases in proportion to exercise intensity.<br />This is due to an increase in heart rate and stroke volume.<br />Trained have greater exercise cardiac output due to greater stroke volumes.<br />
  6. 6. Cardiac Output - Trained vs. Untrained<br />At Rest:<br />Max. Exercise:<br />Adapted from McArdle, Katch, and Katch<br />
  7. 7. Myocardial Infarction<br />Inadequate blood reaching heart muscle, causing necrosis of heart muscle<br />Does not go away with rest<br />Onset usually preceded by severe fatigue for several days<br />Occlusion of 4-6 hours will result in irreversible damage<br />
  8. 8. What a Coronary Artery Occlusion looks like<br />Arrows indicate occlusions. From http://www.rjmatthewsmd.com/Definitions/myocardial_infarction.htm<br />
  9. 9. Aerobic Exercise<br />
  10. 10. Factors That Influence Performance<br />Maximal oxygen consumption<br />Lactate threshold<br />Fuel utilization<br />Muscle fiber characteristics<br />Exercise economy<br />
  11. 11. Interval Training<br />Allows for a greater volume of exhaustive work to be performed.<br />Benefits:<br />Teaches race pace<br />Can improve anaerobic metabolism<br />Can improve maximal oxygen consumption<br />Increases speed<br />
  12. 12. Interval Training Variables<br />Intensity of the exercise<br />Duration of the exercise interval<br />Length of recovery<br />Number of repetitions<br />

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