LABORATORY REPORT
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Activity:
Name:
Instructor:
Date:

Effect of Exercise on Cardiac Output
May 3, 2015

Predictions
1. During exercise
HR will increase.
2. During exercise
SV will increase.
3. During exercise
CO will increase.

Materials and Methods
1. Dependent Variable
EDV, ESV, and cardiac cycle length
2. Independent Variable level of physical activity(resting or exercise)
3. Controlled Variables age, weight, height
4. What instrument was used to measure cardiac volumes?
Cardiac Volumes were measured by a MRI
5. Does the instrument used to measure cardiac volume use X-Rays? Explain.
The instrument uses magnet that generates sectional images of the body being scanned.

Results
Table 2: Resting and Exercising Cardiac Cycle Length, EDV, and ESV

Subject 1
Subject 2
Subject 3
Averages

Resting Values
Exercising Values
Cardiac
EDV (mL) ESV (mL)
Cardiac
EDV (mL) ESV (mL) cycle length cycle length
(msec)
(msec)
832
142
67
371
144
34
814
136
65
436
145
40
814
135
68
414
140
35
138
67
143
36

Resting and Exercising HR, EDV andESV

1. Resting and exercising cardiac cycle length -a. What was the average resting cardiac cycle length?
The average resting cardiac cycle length was 820 msec
b. What was the average exercising cardiac cycle length?
The average exercising cardiac cycle lenght was 407 msec.
c. The range of normal resting cardiac cycle length is between 818 and 858 ms. Did average cardiac cycle length increase, decrease, or not change with exercise?
The average cardiac cycle length decreases to an average of 407 during excercise.

2. Resting and exercising EDV -a. What was the average resting EDV?
The average EDV during rest was 138ml
b. What was the average exercising EDV?
The average exercising EDV was 143ml