Effects of Aerobic and Anaerobic Exercise on the Ventilatory and Circulatory Systems

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Effects of Aerobic and Anaerobic Exercise on the
Ventilatory and Circulatory Systems

• Anna Burkhead
• Suzy Borgschulte
• Biology 151L

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Circulatory System Variables
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Ventilatory Variables
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MECHANISM and PREDICTIONS AFTER AEROBIC
EXERCISE
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MECHANISM and PREDICTIONS AFTER ANAEROBIC
EXERCISE
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DIFFERENCES BETWEEN AEROBIC AND ANAEROBIC EXERCISE
No additional oxygen introduced to body during
anaerobic exercise
Amount of O2 bound to red blood cells increases
more dramatically
When breathing resumes, obtaining O2 is necessary
immediately!
Humans do this by inhaling
Once O2 in lungs, need to distribute it to
tissues - fast!
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MATERIALS
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SUBJECTS
All volunteers were fit female Duke students
between the ages of 18 and 22
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PROCEDURE
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RUNNING.
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AND JUMPING.note the noseclips!!
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DATA BMI, Pulse, and Blood Pressure
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Are the differences between mean values
SIGNIFICANT??
STUDENTS t-test assuming equal variance between
samples
Null hypotheses are rejected if the p-value
generated from the t-test is less than 0.05.
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Pulse after aerobic and anaerobic exercise
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BUT WHAT DOES IT ALL MEAN???
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PERCENT INCREASES OF ALL VARIABLES
PULSE
BREATHING RATE
TIDAL VOLUME
TIDAL VOLUME
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• During exercise, oxygen is depleted from the
  system, causing a deeper tidal volume to
  compensate for lack of oxygen.

• Breathing rate will also increase during exercise
  for this same reason

• However, since oxygen is a need after both types
  of exercise, tidal volume experiences the most
  increase because it is the first step in
  supplying the oxygen.

• There must be a trade off between getting more
  oxygen to the muscles and hyperventilating. The
  diaphragm can only contract and relax at a
  certain maximum rate, this limits the breathing
  rate and at the same time avoids CO2 buildup.

• Athletes or highly fit individuals have a higher
  tolerance to the higher rate of breathing during
  aerobic exercise, allowing them to maintain lower
  pulse and blood pressure while transporting
  sufficient oxygen to needy cells.

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Correlation between BMI and resting breathing rate
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• Anaerobic exercise did not last as long as
  aerobic, so the pulse did not increase as much.

• Blood pressure increased by approximately the
  same amount after aerobic and anaerobic exercise.
  Restricting breathing during exercise does not
  significantly affect blood pressure.

• This contradicts the mechanism! Perhaps
  anaerobic exercise causes the body to want to
  breathe before any significant effects can be
  seen in blood pressure or pulse. So subjects
  didnt hold their breath very long.

• Since no oxygen is drawn into lungs during
  anaerobic exercise, there is no reason for pulse
  to increase theres not sufficient oxygen for
  transport to muscles.

• Perhaps pulse increased several moments after
  breathing was resumed, when oxygen was once again
  available to transport.

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Correlations between BMI and pulse
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Sources of Error and Possible Corrections
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The Final Summary

• Pulse, systolic blood pressure, tidal volume, and
  breathing rate increase after aerobic and
  anaerobic exercise.

• No variable showed significant increase in value
  between post-aerobic and post-anaerobic exercise

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Animal Physiology SO HOT RIGHT NOW!