Chapter 10: Cardio respiratory Exercise

Question 1

Define cardiorespiratory endurance:

Answer 1

Ability to perform whole-body activities for extended periods without undue fatigue

Question 2

The improvement of cardiorespiratory endurance through training occurs because of increased capability of oxygen delivery of what 4 elements

Answer 2

• heart
• blood vessels
• blood
• lungs

Question 3

When exercising, HR _____(inc/dec), and diastolic filling time _____ (inc/dec).

Answer 3

• increases

- decreases

Question 4

HR parameters change depending on what factors?

Answer 4

• age
• body position
• type of exercise
• CV disease
• heat and humidity
• medications
• blood volume

Question 5

Monitoring HR is an indirect method of estimating _____ ______.

Answer 5

Oxygen consumption

Question 6

How does stroke volume change during increased demands of cardiac output during exercise?

Answer 6

Increases

Question 7

Stroke volume is equal to the difference between ____ _____ ____ and ____ ____ ____.

Answer 7

• end diastolic volume

- end systolic volume

Question 8

Typical values for stroke volume range from ____ to ____ mL/beat at rest and ____ to _____ mL/beat at maximum.

Answer 8

• 60-100

- 100-120

Question 9

Stroke volume will continue to increase only to the point at which ….
This occurs at about ___% of max aerobic capacity, or at a HR of ____ bpm. Above this level, increases in the cardiac output are accounted for by increases in ____.

Answer 9

• diastolic filling time is simply too short to allow adequate filling
• 40-50%
• 110-120
• HR

Question 10

Cardiac output:

Answer 10

How much blood the heart is capable of pumping in exactly 1 min

Question 11

Cardiac output is the primary determinant of ….

Answer 11

The max rate of oxygen consumption possible

Question 12

During exercise, cardiac output increases to about ____ times that experienced during rest (to about ___ L) in the normal individual, and may increase as much as ____ times in the elite endurance athlete (to about ___ L).

Answer 12

• 4
• 20
• 6
• 31

Question 13

Cardiac output =

Answer 13

Stroke volume x HR

Question 14

HR is regulated by the _____ nervous system as well as circulating levels of _____ secreted from the ____ _____.

Answer 14

• autonomic
• epinephrine
• adrenal medulla

Question 15

Conditions that resist ventricular outflow (ex. ____ or and increase in ______) will result in a _____ in cardiac output.

Answer 15

• HBP
• after load
• decrease

Question 16

A condition that would decrease venous return (ex. ____ ____ disease) _____ stroke volume and would ______ cardiac output.

Answer 16

• peripheral artery
• decrease
• decrease

Question 17

Why does resting HR often decrease with aerobic conditioning?

Answer 17

Increase in stroke volume brought about by increased venous return and to increased contractile conditions in the myocardium.

Question 18

During exercise, females tend to have a 5-10% ____ cardiac output than males at all intensities. This is likely the result of a lower concentration of _____ in the female, which is compensated for during exercise by an ____ cardiac output.

Answer 18

• higher
• hemoglobin
• increased