Nt1310 Unit 6 Lab 1

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

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