Transcript BLOOD PRESSURE - LeMoyne

Effects of Stress
On
BLOOD PRESSURE
Group 1 Members:
 Kimaria (Kim) Baker - Collierville High
 Yasir Rosli - White Station High
 Ashley Williams - Fairley High
 Dai Williams - White Station High
Objectives
 Stress such as Physical exercise &
Cold stress increases blood
pressure
What is Blood Pressure?
 Simply defined as the force of the blood
against the walls of the artery
 Expressed as a ratio (120/80)
 Higher number is systolic pressure
 Lower number is diastolic pressure
Systolic vs. Diastolic Blood Pressure
 The top number in a
 The bottom number in a
blood pressure reading.
 The force of blood in the
arteries as the heart
beats.
 Normal and high systolic
reading is also known as
“Isolated Systolic
Hypertension” or I.S.H.
blood pressure reading.
 The force of blood in the
arteries as the heart
relaxes between beats.
 This pressure has
consequences when
elevated, especially for
younger people.
Experiment
Procedure:
 The students were introduced to physical
stress by running up and down the stairs of
a 4-story building two times.
 The students were also introduced to cold
stress by submerging their left hand into ice
cold water.
 Immediately after stress induction, the
students had their blood pressure taken to
observe the effects of both types of stress on
the flow of blood.
Data Collected
ID #
Normal Systolic
Normal Diastolic
Cold Stress Systolic
Cold Stress
Diastolic
Physical Stress
Systolic
Physical Stress
Diastolic
000-00-0662
114.67
69.67
143
86
131
85
000-00-0794
111
66.33
130
74
145
94
000-00-1204
95
54.67
113
64
182
125
000-00-2288
112.33
75
142
79
146
70
000-00-3357
114
74.33
135
89
124
83
000-00-4023
115.67
65.33
139
86
139
65
000-00-6969
138.33
83
131
75
184
94
000-00-7115
119.33
56
146
64
142
60
000-00-7541
109.33
60.67
130
72
138
81
000-00-8159
122.67
60
144
50
146
50
000-00-8611
100.67
57
121
79
145
94
000-00-9512
116.67
73.67
132
84
135
84
Hypothesis
 H0: no matter what happened, blood pressure
should stay the same.
 Ha: physical stress and cold stress would
increase blood pressure
Systolic Blood Pressure Under Stress
180
160
Normal Systolic
Cold Stress Systolic
140
Physical Stress
Systolic
120
Diastolic Blood Pressure Under Stress
100
130
80
1
2
3
4
5
6
7
8
Student ID
9 10 11 12
120
Blood Pressure Measurements
Blood Pressure Measurements
200
110
100
Normal Diastolic
90
Cold Stress Diastolic
80
Physical Stress
Diastolic
70
60
50
40
1
2
3
4
5
6
7
8
Student ID
9 10 11 12
Result of Paired t-test
ICE Cold Water
t-Test: Paired Two Sample for Means
Mean
Variance
Observations
Pearson Correlation
Hypothesized Mean Difference
df
t Stat
P(T<=t) one-tail
t Critical one-tail
P(T<=t) two-tail
t Critical two-tail
Cold
Stress
Normal
Systolic Systolic
114.14
133.83
116.19
97.24
12
12
0.58
0
11
-7.17
0.000009
1.80
0.000018
2.20
H0: BP before = BP after
Ha: BP after > BP before
p-value = 0.000009
Significant level = 5%
p-value < significant level
So, reject H0.
Therefore, under cold stress, one will increase systolic of blood pressure.
t-Test: Paired Two Sample for Means
Mean
Variance
Observations
Pearson Correlation
Hypothesized Mean Difference
df
t Stat
P(T<=t) one-tail
t Critical one-tail
P(T<=t) two-tail
t Critical two-tail
Cold
Stress
Normal
Diastolic Diastolic
66.31
75.17
80.45
129.79
12
12
0.55
0
11
-3.104
0.005
1.796
0.010
2.201
t-Test: Paired Two Sample for Means
Mean
Variance
Observations
Pearson Correlation
Hypothesized Mean Difference
df
t Stat
P(T<=t) one-tail
t Critical one-tail
P(T<=t) two-tail
t Critical two-tail
Physical
Stress
Normal
Systolic Systolic
114.1389 146.4167
116.1911 336.2652
12
12
0.101782
0
11
-5.507
0.00009
1.795884
0.000184
2.200986
t-Test: Paired Two Sample for Means
Mean
Variance
Observations
Pearson Correlation
Hypothesized Mean Difference
df
t Stat
P(T<=t) one-tail
t Critical one-tail
P(T<=t) two-tail
t Critical two-tail
Physical
Stress
Normal
Diastolic Diastolic
66.31
82.08
80.45
385.17
12
12
-0.017
0
11
-2.52
0.014
1.80
0.029
2.20
Similarly, our data supports the other
three paired – t tests which are
•normal diastolic vs. cold stress diastolic
•normal diastolic vs. physical stress diastolic
•Normal systolic vs. physical stress systolic
Conclusion: Manage Stress
 Under any kind of stress, blood pressure
will increase.
 One should develop relaxation techniques
to deal with stress.
 To get a healthy life, one should control
his/her blood pressure by managing stress.
A Big Thank You to All!
 Dr. Valerie Chu (Statistics Professor)
 Dr. Uddin (Biology Professor)
 Dr. John Harris (Director of TLSAMP
Program)
 Dr. Rajagopolan (Math Professor)