Lesson on Cardiovascular
and Respiratory Systems in
Exercise
Agenda
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Introduction
Cardiovascular System
Effects of Exercise on Heart Rate
Effects of Exercise on Stroke Volume
Effects of Exercise on Cardiac Output
Effects of Exercise on Blood Pressure
Long-Term Effects of Exercise on Blood Pressure
Respiratory System
Ventilation During Exercise
Minute Ventilation
Gaseous Exchange During Exercise
Anticipatory Rise
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Introduction
Introduction, Purpose of the Lesson
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Understanding the Cardiovascular System: The cardiovascular system consists of the heart, blood
vessels, and blood. It is responsible for transporting nutrients, oxygen, and waste products
throughout the body.
Purpose of the Lesson: The purpose of this lesson is to explore the effects of exercise on the
cardiovascular and respiratory systems. We will delve into the changes that occur in heart rate,
stroke volume, cardiac output, and blood pressure during exercise, as well as the long-term impact
of exercise on blood pressure. Additionally, we will examine the respiratory system and its
response to exercise, including ventilation, minute ventilation, and gaseous exchange.
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Cardiovascular System
Overview of Cardiovascular System, Structure and Function of the Heart
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Function of the Cardiovascular System: The
cardiovascular system maintains blood flow
to deliver oxygen and nutrients to tissues,
remove waste products, and regulate body
temperature. It also plays a vital role in
maintaining homeostasis.
Structure and Function of the Heart: The
heart is a muscular organ composed of four
chambers: two atria and two ventricles. Each
chamber has specific functions in the
circulation of blood. The cardiac muscle
contracts rhythmically to propel blood
through the circulatory system.
Photo by Ali Hajiluyi on Unsplash
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Effects of Exercise on Heart Rate
Heart Rate, Resting Heart Rate, Maximal Heart Rate, Relationship with Exercise Intensity
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Heart Rate and Exercise: Heart rate refers
to the number of times the heart beats per
minute. Resting heart rate is the heart rate
when the body is at rest, while maximal
heart rate is the highest heart rate an
individual can achieve during exercise.
The relationship between exercise
intensity and heart rate is linear, with
heart rate increasing as exercise intensity
rises.
Photo by Nathan Dumlao on Unsplash
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Effects of Exercise on Stroke Volume
Stroke Volume, Preload, Afterload, Relationship with Exercise Intensity
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Stroke Volume and Exercise: Stroke
volume refers to the amount of blood
ejected from the left ventricle of the heart
with each contraction. It is influenced by
preload, which is the volume of blood in
the ventricle before contraction, and
afterload, which is the resistance the
heart must overcome to eject blood.
Stroke volume increases with exercise
intensity due to an increase in preload
and contractility.
Photo by Robina Weermeijer on Unsplash
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Effects of Exercise on Cardiac Output
Cardiac Output, Calculation, Relationship with Heart Rate and Stroke Volume
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Calculating Cardiac Output: Cardiac
output is the amount of blood pumped by
the heart in one minute. It is calculated by
multiplying the heart rate by the stroke
volume. During exercise, cardiac output
increases due to the combined effect of
an elevated heart rate and increased
stroke volume.
Photo by Natanael Melchor on Unsplash
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Effects of Exercise on Blood Pressure
Blood Pressure, Systolic Pressure, Diastolic Pressure, Relationship with Exercise Intensity
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Blood Pressure and Exercise: Blood
pressure is the force exerted by blood
against the walls of the arteries. It is
expressed as systolic pressure (during
ventricular contraction) over diastolic
pressure (during ventricular relaxation).
Blood pressure increases with exercise
intensity as a result of the increased
demand for oxygen and nutrients by the
muscles.
Photo by Mufid Majnun on Unsplash
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Long-Term Effects of Exercise on Blood Pressure
Hypertension, Reduced Resting Blood Pressure, Improved Endothelial Function
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Impact of Exercise on Blood Pressure:
Regular exercise is associated with a
reduction in resting blood pressure and
improved endothelial function, which
supports healthy blood vessel function
and reduces the risk of hypertension.
These long-term adaptations contribute to
overall cardiovascular health and reduce
the risk of cardiovascular disease.
Photo by jesse orrico on Unsplash
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Respiratory System
Overview of Respiratory System, Structure and Function of the Lungs
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Function of the Respiratory System: The
respiratory system consists of the airways, lungs,
and respiratory muscles. Its primary function is to
facilitate the exchange of oxygen and carbon
dioxide between the external environment and
the body's internal tissues.
Structure and Function of the Lungs: The lungs
are the primary organs of respiration, responsible
for the exchange of gases. They consist of
bronchi, bronchioles, and alveoli, where gas
exchange occurs between the air and the blood.
Additionally, respiratory muscles, such as the
diaphragm and intercostal muscles, facilitate
breathing.
Photo by Robina Weermeijer on Unsplash
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Ventilation During Exercise
Ventilation, Tidal Volume, Frequency, Relationship with Exercise Intensity
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Ventilation and Exercise: Ventilation refers to the volume of air moved in and out of the lungs per
minute. Tidal volume is the volume of air inhaled and exhaled with each breath, and frequency is
the number of breaths taken per minute. During exercise, ventilation increases to meet the
elevated oxygen demand, with an increase in both tidal volume and frequency.
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Minute Ventilation
Minute Ventilation, Calculation, Relationship with Tidal Volume and Frequency
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Calculating Minute Ventilation: Minute
ventilation represents the total volume of
air moved in and out of the lungs in one
minute. It is calculated by multiplying tidal
volume by breathing frequency. During
exercise, minute ventilation increases due
to the coordinated rise in tidal volume and
breathing frequency.
Photo by Sincerely Media on Unsplash
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Gaseous Exchange During Exercise
Gas Exchange in Alveoli, Diffusion, Oxygen Uptake, Carbon Dioxide Removal
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Gaseous Exchange and Exercise:
Gaseous exchange occurs in the alveoli of
the lungs, where oxygen is taken up by
the blood and carbon dioxide is removed
from the blood. Diffusion facilitates the
exchange of gases, supporting the uptake
of oxygen by the body's tissues and the
removal of carbon dioxide produced
during metabolism.
Photo by Brett Jordan on Unsplash
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Anticipatory Rise
Anticipatory Rise, Neural and Hormonal Factors, Preparation for Exercise
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Anticipatory Rise During Exercise: The anticipatory rise involves the increase in ventilation and
heart rate that occurs in anticipation of physical activity. It is influenced by neural signals and
hormonal factors, such as the release of adrenaline, preparing the body for the upcoming exertion
by increasing oxygen availability and blood flow to working muscles.
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