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Nt1310 Unit 6 Lab 1

explanatory Essay
619 words
619 words
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Lab 6: pre-lab questions 1. Systolic blood pressure is the contraction phase of the arterial walls whereas diastolic blood pressure is the relaxation phase of the arterial walls. Mean arterial pressure is the average pressure in the arteries during one cardiac cycle. Pulse pressure is the difference between systolic and diastolic pressure. It represents the force that the heart generates each time it contracts. 2. Total peripheral resistance (TPR) is the resistance to blood flow throughout the vasculature which can be influenced by the radius of the vessel, length of the vessel, and viscosity of the blood. Total peripheral resistance decreases with increasing intensity in aerobic exercise due to the significant dilation of the vessels during exercise. TPR …show more content…

In this essay, the author

  • Explains that systolic blood pressure is the contraction phase of the arterial walls, whereas diastoliosis is relaxation. mean arterial pressure represents the average pressure in the arteries during one cardiac cycle.
  • Explains that total peripheral resistance (tpr) is the resistance to blood flow throughout the vasculature. it decreases with increasing intensity in aerobic exercise due to the significant dilation of the vessels during exercise.
  • Explains that systolic blood pressure increases linearly as intensity increases, whereas diastolia remains constant or decreases slightly. oppositionally, little blood movement results in a lower pressure in the vessels and lower total peripheral resistance.
  • Explains that the mean arterial pressure (map) is calculated as map= (pulse pressure/3) + diastolic bp, where a true average would be sbp/dbp.
  • Describes the valsalva maneuver as an attempt at exhaling against a closed airway when the mouth is closed and nose is pinched shut.
  • Explains that recovery heart rate would be lower in a fit individual than sedentary one because the cardiovascular system is not as efficient at transporting oxygen to the tissues.
  • Explains that an 800-meter sprint is a high intensity and vigorous exercise that would rely on anaerobic metabolism. for an aerobic field test, the individual must perform an exercise in which they reach steady state and maintain their vo2max.
  • Explains the 12-minute run test and the 1-mile walk test.
  • Explains that the inability to assess vo2max is a source of error because the individual will not exercise to absolute fatigue.

Recovery heart rate would be lower in a fit individual than a sedentary one because the cardiovascular system is not as efficient at transporting oxygen to the tissues. 3. An 800-meter sprint is a high intensity and vigorous exercise that would rely on anaerobic metabolism which is not what the field test is measuring. For an aerobic field test, the individual must perform an exercise in which they reach steady state and maintain their level of VO2max. 4. The 12-minute run test requires the participant to cover as much distance in a 12-minute time period. Limitations to this test include participant motivation (http://www.topendsports.com/testing/tests/cooper.htm). The 1-mile walk test is a modified version of the 12-minute run test and is a good option for individuals beginning a fitness program. The individual is assessed on how quickly they can complete one mile at a brisk walking pace. Limitations to this test can include results that do not directly asses VO2max since the test is low intensity (http://www.canadacollege.edu/fitnesscenter/assess-1-mile.php). 5. Sources of error include the inability to assess VO2max because the individual will not exercise to absolute fatigue and VO2max must be

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