Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Student ID#:128180
Student Name
Team Name: Super Awsomes
Lab Assignment #: 5
Lab Title: Muscle Fatigue
Date: 2014-04-01
Purpose / Objective(s):

Take measurements in the lab of effects to heart rate and respiratory rate before and after lifting three different weights in an attempt to achieve
muscle fatigue
Hypothesis (ese):




Assumption that there will eventually be a point where my body will be unable to continue performing a specific function, i.e., doing a bicep curl,
after a specific amount of time, weight, or reps
After doing a large number of reps, I assume my heart rate will increase
Respiratory rate should increase theoretically after a high number of reps with a large weight
Men theoretically will be able to lift heavier weights, do more reps, and have higher heart rates and respiratory rates
Materials / Subjects / Specimens:


Materials used included free weights at different weights, such as 3 pounds, 5 pounds, 7 pounds
Data was recorded for 5 human subjects
Methods / Tools / Instrumentation / Procedures:



Exercise repetitions or reps were counted during a 60 second period using the wall clock or an iPhone timer
Heart rate (BPM or beats per minute) was measured at resting/before muscle fatigue test, and after repetitions, and at 3 minute, 6 minute and 10
minute intervals, for three different weights
Respiratory Rate (RR: amount of breaths in and out per minute) was measured at resting/before muscle fatigue test, and after repetitions, and at 3
minute, 6 minute and 10 minute intervals, for three different weights
Page 1 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Results: Tables

Table #1 summarizes: Heart Rate for myself (Cathy Odom) before bicep curls and at peak, and at intervals after of 3 minutes, 6 minutes, and 10
minutes

Table #2 summarizes: Respiratory Rate (RR or breaths in and out in one minute) for myself before bicep curls and at peak, and at intervals after
of 3 minutes, 6 minutes, and 10 minutes

Table #3 summarizes: Heart Rate for my four classmates Nancy, Christina, Krystin, and Kaycee before bicep curls and at peak, and at intervals
after of 3 minutes, 6 minutes, and 10 minutes

Table #4 summarizes: Respiratory Rate for my four classmates Nancy, Christina, Krystin, and Kaycee before bicep curls and at peak, and at
intervals after of 3 minutes, 6 minutes, and 10 minutes

Table #5 summarizes: Average of 5 people for Heart Rates (BPM or beats per minute) before bicep curls and at peak, and at intervals after of 3
minutes, 6 minutes, and 10 minutes

Table #6 summarizes: Average of 5 people for Respiratory Rates (RR or breaths in and out in one minute) before bicep curls and at peak, and at
intervals after of 3 minutes, 6 minutes, and 10 minutes
Results: Graphs

Figure #1 shows a graph of correlation between work and heart rate at peak performance for myself.

Figure #2 shows a graph of heart rates at resting, peak, and 10 minutes post peak.

Figure #3 shows a graph of maximum number of repetitions at low weight for 5 students.

Figure #4 shows a graph of respiratory rates pre-stress, peak, and 6 minutes post stress.

Figure #5 shows a graph of correlation between number of repetitions and resistance (weights in pounds).

Figure #6 shows a graph of respiratory rates pre-stress, peak, and 6 minutes post stress.
Page 2 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Analysis: Tables

Table #1 summarizes heart rate for myself (Cathy Odom) before bicep curls and at peak, and at intervals after of 3 minutes, 6 minutes, and 10
minutes. With a low weight of 2 pounds, I was able to do a high number of repetitions at 44, but at a 7 pound weight, I was only able to do 29 reps.
My heart rate was actually lower at 10 minutes post workout at 60 than before starting at rest at 76 beats per minute.

Table #2 summarizes respiratory rate (RR or breaths in and out in one minute) for myself before bicep curls and at peak, and at intervals after of 3
minutes, 6 minutes, and 10 minutes. My respiratory rate started at 15 pre-stress, and had a peak at 23, and at 10 minutes post peak it was at 17.

Table #3 summarizes heart rate for my four classmates Nancy, Christina, Krystin, and Kaycee before bicep curls and at peak, and at intervals
after of 3 minutes, 6 minutes, and 10 minutes. Heart rates averaged per person widely varied from 79 to 98 pre-stress. Heart rate at peak average
varied from 78-84. Heart rates at 10 minutes post peak average per person varied from 74-76, a much closer statistic.

Table #4 summarizes respiratory rate for my four classmates Nancy, Christina, Krystin, and Kaycee before bicep curls and at peak, and at
intervals after of 3 minutes, 6 minutes, and 10 minutes. All four women each used weights here of 3 pounds, 7 pounds, and 15 pounds.
Respiratory rates pre stress were either 19 of 20 for all four women. Respiratory rates at peak interval average varied from 22-28 breaths per
minute. Respiratory rates at 6 minutes post cardiac stress varied from 18-25 breaths per minute.

Table #5 summarizes an average of 5 people for Heart Rates (BPM or beats per minute) before bicep curls and at peak, and at intervals after of 3
minutes, 6 minutes, and 10 minutes. Weight reps for the low weight averaged a high number at 47, and for the medium weight at 41, and then 26
at the highest weight. So as the weight increased, the number of repetitions decreased.

Table #6 summarizes the average of 5 people for Respiratory Rates (RR or breaths in and out in one minute) before bicep curls and at peak, and
at intervals after of 3 minutes, 6 minutes, and 10 minutes. Respiratory rates at peak fatigue varied from 26-39 breaths per minute. Respiratory
rates at 3 minutes post peak were very close together, and averaging at 21.3 breaths per minute. Respiratory rates at 10 minutes post peak varied
from 18-21 breaths per minute with an average of 20.3. So, respiratory rates followed a pattern of being higher at peak and lower post peak.
Analysis: Graphs

Figure #1 shows a graph of a correlation between work and heart rate at peak performance for myself. This shows a correlation, that as your heart
rate goes up, your work rate also goes up as well.

Figure #2 shows a graph of heart rates at resting, peak, and 10 minutes post peak. At resting, heart rates were low, and at peak, heart rates were
high, and then decreasing by 10 minutes post peak for most students.

Figure #3 shows a graph of maximum number of repetitions at low weight for 5 students. These varied closely from 44 to 51. At a lower weight, we
were able to do more repetitions per minute. At a higher weight, we were able to do less repetitions, due to muscle fatigue.
Page 3 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL

Figure #4 shows a graph of respiratory rates pre-stress, peak, and 6 minutes post stress for 5 students. Most students, like myself, showed a
pattern of a low number pre-stress, a high number at peak, and a medium number at the 6 minute post stress level. Christina showed the same
respiratory rate for all three levels of pre-stress, peak, and 6 minutes post stress. I’m not sure if this means there was an error in recordkeeping or
if this is a different type of heart/cardiac activity, that her heart was not stressed during this activity.

Figure #5 shows a graph of the theoretical correlation between number of repetitions and resistance (weights in pounds). Theoretically, at a higher
number of weight resistance, there should be less number of repetitions. This scatter plot did not quite come in at a perfect linear line, so I’m not
sure if I did this one incorrectly or if the data is supposed to plot in this manner.

Figure #6 shows a graph of the correlation between work and peak respiratory rates. Theoretically, as work increases, so should respiratory rates.
The scatter plot and linear line seemed to show a better correlation in this graph than in Figure #5.
Page 4 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
ATTACHMENTS
Summary / Formal / Conclusive Results / Tables, Charts, Illustrations
Table #1 shows Heart Rate for myself (Cathy Odom) before bicep curls and at peak, and at intervals after of 3 minutes, 6 minutes, and 10 minutes
Self/Cathy
Weight
(LBS)
Reps for 1
Minute or
Fatigue
Work
Ht Rate Pre
Stress
Ht Rate at
Peak /
Fatigue
Ht Rate Post
Stress
3 Minutes
Ht Rate Post
Stress 6
Minutes
Ht Rate Post
Stress
10 Minutes
Low
Medium
High
2.0
3.0
7.0
44
41
29
88.0
123.0
203.0
76
80
78
100
100
100
64
72
70
56
68
64
60
64
60
Average
4.0
38.0
152.0
100.0
78.0
68.7
62.7
61.3
Table #2 shows Respiratory Rate (RR or breaths in and out in one minute) for myself before bicep curls and at peak, and at intervals after of 3 minutes, 6
minutes, and 10 minutes
Self/Cathy
Resp
Rate Pre
Stress
Resp Rate
at Peak /
Fatigue
Resp Rate
Post
Stress
3 Minutes
Resp Rate
Post
Stress 6
Minutes
Resp Rate Post
Stress
10 Minutes
Low
Medium
High
15
15
15
20
22
23
19
22
21
18
20
21
17
26
20
Average
15.0
21.7
20.7
19.7
21.0
Page 5 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Table #3 shows Heart Rate for my four classmates Nancy, Christina, Krystin, and Kaycee before bicep curls and at peak, and at intervals after of 3
minutes, 6 minutes, and 10 minutes
Reps for 1
Ht Rate at
Ht Rate Post
Ht Rate Post
Ht Rate Post
Nancy
Weight
Ht Rate Pre
Minute or
Work
Peak /
Stress
Stress 6
Stress
Weight
LB
Stress
Fatigue
Fatigue
3 Minutes
Minutes
10 Minutes
Low
3.0
51
153.0
88
80
78
76
76
Medium
7.0
44
308.0
88
80
76
76
74
High
15.0
24
360.0
88
88
78
78
78
Average
8.3
39.7
330.6
88.0
84.7
84.7
76.7
76.0
Christina
Weight
LB
Low
Medium
High
Average
3.0
7.0
15.0
8.3
Krystin
Weight
LB
Low
Medium
High
Average
3
7
15
8.3
Kaycee
Weight
LB
Low
Medium
High
Average
3.0
7.0
15.0
8.3
Reps for 1
Minute or
Fatigue
51
44
24
39.7
Reps For 1
Minute or
Fatigue
47
36
25
36.0
Reps for 1
Minute or
Fatigue
44
41
30
38.3
Work
Ht Rate Pre
Stress
153.0
308.0
360.0
330.8
90
98
98
98.0
Ht Rate at
Peak /
Fatigue
60
80
108
84.7
Ht Rate Post
Stress
3 Minutes
78
86
90
84.7
Ht Rate Post
Stress 6
Minutes
80
86
86
84.0
Ht Rate Post
Stress
10 Minutes
80
84
84
82.7
Work
Heart Rate
Pre Stress
Heart Rate
at Peak
88
90
88
88.7
Ht Rate Post
Stress
3 Minutes
80
74
84
79.3
Ht Rate Post
Stress 6
Minutes
76
73
72
73.7
Ht Rate Post
Stress
10 Minutes
78
75
74
75.7
141.0
287.0
450.0
319.4
80
78
80
79.3
Work
Ht Rate Pre
Stress
Ht Rate at
Peak /
Fatigue
74
75
86
78.3
Ht Rate Post
Stress
3 Minutes
70
73
82
75.0
Ht Rate Post
Stress 6
Minutes
70
73
80
74.3
Ht Rate Post
Stress
10 Minutes
72
72
80
74.7
132.0
287.0
450.0
319.4
80
78
80
79.3
Page 6 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Table #4 shows Respiratory Rate for my four classmates Nancy, Christina, Krystin, and Kaycee before bicep curls and at peak, and at intervals after of 3
minutes, 6 minutes, and 10 minutes
Resp Rate Post
Weight
Resp Rate
Resp Rate at
Resp Rate Post
Resp Rate Post Stress
Nancy
Stress
LB
Pre Stress
Peak / Fatigue
Stress 6 Minutes
10 Minutes
3 Minutes
Low
3.0
20
22
20
18
18
Medium
7.0
20
28
26
28
26
High
15.0
20
36
32
30
28
Average
8.3
20.0
28.7
26.0
25.3
24.0
Christina
Weight
LB
Resp Rate
Pre Stress
Resp Rate at
Peak / Fatigue
Low
Medium
High
Average
3.0
7.0
15.0
8.3
20
20
20
20.0
20
22
26
22.7
Krystin
Weight
LB
Resp Rate
Pre Stress
Resp Rate at
Peak / Fatigue
Low
Medium
High
Average
3
7
15
8.3
20
19
18
19.0
Kaycee
Weight
LB
Low
Medium
High
Average
3.0
7.0
15.0
8.3
Resp Rate Post
Stress
3 Minutes
22
24
22
22.7
Resp Rate Post
Stress 6 Minutes
Resp Rate Post Stress
10 Minutes
20
20
20
20.0
18
20
20
19.3
Resp Rate Post
Stress
3 Minutes
Resp Rate Post
Stress 6 Minutes
Resp Rate Post Stress
10 Minutes
26
26
25
25.7
18
20
25
21.0
16
18
22
18.7
17
17
20
18.0
Resp Rate
Pre Stress
Resp Rate at
Peak / Fatigue
Resp Rate Post
Stress
3 Minutes
Resp Rate Post
Stress 6 Minutes
Resp Rate Post Stress
10 Minutes
18
19
20
19.0
30
24
30
28.0
22
22
20
21.3
18
20
20
19.3
20
18
19
19.0
Page 7 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Table #5 shows an average of 5 people for Heart Rates (BPM or beats per minute) before bicep curls and at peak, and at intervals after of 3 minutes, 6
minutes, and 10 minutes
Work
Ht Rate Pre
Stress
Ht Rate at
Peak /
Fatigue
47.4
41.2
26.4
132.7
287.0
450.0
87.6
88.4
89.2
75.6
81.0
89.6
Ht Rate
Post
Stress
3 Minutes
74.0
76.2
80.8
38.3
319.4
88.9
82.9
78.5
Weight LBS
Reps for 1
Minute or
Fatigue
Low
Medium
High
2.8
6.2
13.4
Average
7.5
Weight / Resistance
Level
Ht Rate
Post Stress
6 Minutes
Ht Rate Post
Stress
10 Minutes
71.6
75.2
76.0
73.2
73.8
75.2
74.3
74.1
Table #6 shows an average of 5 people for Respiratory Rates (RR or breaths in and out in one minute) before bicep curls and at peak, and at intervals
after of 3 minutes, 6 minutes, and 10 minutes
Weight / Resistance
Level
Weight
LBS
Resp Rate Pre
Stress
Resp Rate at Peak
/ Fatigue
Resp Rate Post Stress
3 Minutes
Resp Rate Post
Stress 6 Minutes
Resp Rate Post
Stress
10 Minutes
Low
2.8
12.6
30.1
22
18
18
Medium
6.2
7.9
39.0
22
21.2
21.4
High
13.4
13.4
26.4
20
22.6
21.4
Average
8.3
11.3
31.8
21.3
20.6
20.3
Page 8 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Figure #1: Graph of Correlation between Work and Heart Rate at Peak Performance (self)
Page 9 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Figure #2: Graph of Heart Rates at Resting, Peak, and 10 Minutes Post Peak for 5 Students
Page 10 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Figure #3: Graph of Maximum Number of Repetitions at Low Weight for 5 Students
Page 11 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Figure #4: Graph of Respiratory Rates Pre-Stress, Peak, and 6 Minutes Post Stress
Page 12 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Figure #5: Graph of Correlation Between Number of Repetitions and Resistance (Weights in Pounds)
Page 13 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
Figure #6: Graph of Correlation Between Work and Peak Respiratory Rates
Page 14 of 15
401288112
Biology 105 – Human Biology
Spring 2014
55244 4 Units
UVC1 St. Helena
F 9:00 AM – 3:50 PM
RIDDELL
References
1. How to use correlations in Excel, website reference http://www.gifted.uconn.edu/siegle/research/correlation/excel.htm
2. How to use correlations in Excel, YouTube video reference https://www.youtube.com/watch?v=WgQmC_VfwO8
Observations/Conclusions / Further Considerations:
1. At the highest weight, it was getting harder and harder for me to do repetitions on the last weight, until I got to a point where I could no longer lift
the weight in a bicep curl. For the 7 pound weight, I was only able to do 29 repetitions in 1 minute and my arm was quite fatigued to the point of no
longer being able to move. At heavier weights for all students, we all did less repetitions, as our muscle was getting fatigued.
2. Theoretically, I believe men would lift heavier weights and do more reps. However, this lab and the previous has also shown, that it’s very hard to
get data from male lab partners in a consistent manner. We asked for data via email and on the Facebook website. When we saw a lone wolf male
in our group study meeting, alas, he brought his computer, but not his notebook, where his data was. Ah, the male lab data is quite elusive this
spring season.
3. As you are working out, your heart rate, respiratory rate and work will increase to a peak level, and then drop off at different time levels until your
body is back at rest. This usually follows a pattern for most students, but not all. This anomaly could be record keeping errors, such as transposed
numbers, or perhaps different levels of cardiac abilities per person which will differ.
4. For students with good cardiac state and student athletes, they should be able to recover quickly, lift heavier weights and do more repetitions that
those of us that are “couch potatoes”. On future labs, we can also collect data on students workouts/week and body fat percentages to muscle to
compare and contrast student data.
5. As you increase the weight used in the bicep curl, the repetition totals will slow, but the heart rate will actually increase, as it is working harder to
lift the weight. This makes sense as the heart is pumping faster.
Page 15 of 15
401288112