original experiment (3)
TRANSCRIPT
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Gamin’Emerson Eggers (Human Physiology, Senior)
Rob Petrak (Human Physiology, Junior)Josh Wankum (Human Physiology, Junior)
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Introduction•Video games are played for a variety of reasons• fun, relaxation, reduce stress, improve mood
•Autonomic nervous system• HR, BP, HRV ratio (LF/HF)
•Expectation: “Temporary” SNS predominance
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Methods• 2 Male Subjects
• BIOPAC With EMG Electrodes
• 15 Minute Baseline in Which Last 5 Minutes Were Recorded
• 4 Races, The Last of Which Recorded HR and BP
• BP Was Taken Mid-Race With Automated Blood Pressure Monitor
•Repeated Measures Test Was Ran On All Acquired Data
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Results
Repeated Measures Test:
There was no strong difference from resting to racing (t1 = 0.381, p = 0.77), but there was an increase in the mean from 86 to 91 bpm.
848586878889909192
Mean Heart Rate at Rest and while Playing
RestingPlaying
Hear
t Rat
e (b
pm)
Columns represent mean heart rate +/- SD (n = 2 per measurement)
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Repeated Measures Test:
The SBP at rest vs racing increased from 124 mmHg to 135 mmHg while DBP increased from 66 mmHg to 86 mmHg. Only SBP was statistically significant (t1 = 21, p < 0.05), DBP (t1 = 3.15, p = 0.20).
SBP DBP0
20406080
100120140160
Mean Systolic and Diastolic Blood Pressure at Rest and while Playing
RestingPlaying
Bloo
d pr
essu
re (m
mH
g)
Columns represent blood pressure +/- SD (n = 2 per measurement)
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Repeated Measures Test:
There was no statistical difference in heart rate variability ratio from resting to racing (t1 = 4.34, p = 0.14). However the figure shows that there was a large increase in the mean values.
0
2
4
6
8
10
12
Mean Heart Rate Variability Ratio at Rest and while Playing
RestingPlaying
Hear
t rat
e va
riabi
lity
ratio
Columns represent heart rate variability ratio +/- SD (n = 2 per measurement)
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Discussion of Video Game Effects•Graphs accurately correlate to the expected• Not statistically significant
•Reasoning• Competitiveness → anxiety and stress → increase SNS
•Confounding variables • Adderall (made baseline higher thus less room to
increase OR potentially multiplied the increase in SNS)
•Application• Video games beneficial or harmful to health
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Discussion of Adderall Effects•Graphs accurately correlate to the expected• Not statistically significant
•Reasoning• Stimulant → increase SNS
SBP DBP0
50
100
150 Blood Pressure
Bloo
d pr
essu
re
(mm
Hg)
02468
1012
HRV RatioHR
V Ra
tio020406080
100Heart Rate
Hear
t rat
e (b
pm)
• There was an increase in heart rate from rest without adderall to rest with adderall (t1 = 27.97, p < 0.05).
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Too further assess the autonomic effects of video games more subjects are needed and confounding variables need to be minimized.
Improvements to be made
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References1. Strauss, HM. Physiologic mechanism of heart rate
variability. Rev Bras Hipertens vol. 14(1): 8-15, 2007.
AcknowledgmentsSpecial thanks to Ryan Wenzel for taking the time to supervise during data collection