Lab 2: Blood Pressure
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School
California State University, Northridge *
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Course
346L
Subject
Health Science
Date
Dec 6, 2023
Type
Pages
3
Uploaded by MagistrateEchidna1131
Professor Andrews
KIN 346/L (19020)
2 March 2023
Lab 2: Blood Pressure
1. Explain the two factors that BP depends on and describe how those two factors change
during an acute bout of exercise.
The blood pressure depends on two factors, which are the volume of blood delivered to a vessel
and the amount of resistance exerted against the blood being delivered (vascular resistance). The
vascular resistance on the diameter of the vessels is a small decrease in the radius of the vessels.
During exercise these can change due to cardiac output, which is determined by the heart rate
and stroke volume
2. Explain what was changed in 2017 with BP classifications, how this altered the
occurrence rates for hypertension in the US, and what the change allows for now in essence
why this change was done).’
In 2017 the blood pressure classifications were changed to define hypertension as ≥130/80
mmHg, instead of the previous ≥140/90. This small change in defining hypertension results in
46% of the general population being listed as hypertensive instead of 32% in the United States.
The change allows doctors to be able to detect hypertension sooner to prevent further increase
hypertension and allow the doctor to recommend lifestyle changes.
3. Why is BP lower in the supine position?
Blood pressure is lower in supine position because the heart works less to deliver blood to the
periphery because at resting position the heart is not working a lot.
4. Explain why the BP response to the exercise pictured below is greater than dynamic
exercise (cycling/running), and describe some occupational tasks or ADL's that may
replicate this type of BP response.
The blood pressure response to the exercise is greater than dynamic exercise because in dynamic
exercises the systolic blood pressure increases and the diastolic BP does not increase. In the
static exercise shown in the picture, the systolic and diastolic blood pressure increases that
sustain muscles to block blood flow. Some tasks that can replicate this type of blood pressure
response would be a person push ups or 1 minute planks.
Case Study 1:
Dotty is an 82-year-old retired bus driver. She has noticed that when she stands
from a sitting position she gets very light-headed. She knows that you are an exercise physiology
student and asks you to explain what is going on.
Explain to her in lay terms why this might
be happening.
I would explain to the bus driver that it is common to people because our blood pressure drops
when we suddenly stand up, which causes light dizziness called orthostatic hypotension. Also
explain when our bodies are at rest, our heart is not pumping enough blood. Therefore, when we
quickly stand up, the blood rushes to our head resulting in dizziness.
Case Study 2:
Harry is a 19-year-old student and is the test subject in your lab class
demonstration of blood pressure testing during exercise. During his test, you note that his
systolic blood pressure (190 mmHg) and heart rate (152 beats min) are higher than what you
expect for a workload of 1 kg. When you take his RPE, he tells you it is 15. Based on these
numbers,
what do you think is the cause of his response, and what are the physiological
mechanisms that explain this response?
I think the cause of his response is
arterial hypertension, which is a medical condition in
hypertensive patients. The physiological mechanism is that the systolic blood pressure is
expected to be
>
250mmHg. Harry's systolic blood pressure is 190 mmHg, and heart rate 152
beats /min−1 which is higher during a workload of 1.5 kg. According to the Borg scale, the rate
of perceived exertion, the exercise intensity ranges from 6, which indicates moderately hard or
no exertion to 20, which indicates extremely hard. Harry's rate of perceived exertion is 15, which
indicates his exercise intensity level is high and he is losing breath quickly each time he
exercises.
Case Study 3:
You are taking the blood pressure of a client and repeatedly get 130/95 mmHg.
You report her results as being hypertensive. She is offended and claims that high blood pressure
is over 140 mmHg.
How would you respond?
I would explain to her that the blood pressure classifications have been changed to define
hypertension as ≥130/80 mmHg since 2017 to be able to detect earlier stages of hypertension.
Then, I would suggest and advise her to adjust her lifestyle to help her get to normal blood
pressure, which is <120mmHg/<80 mmHg.
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