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Gamin’ Emerson Eggers (Human Physiology, Senior) Rob Petrak (Human Physiology, Junior) Josh Wankum (Human Physiology, Junior)

Original Experiment (3)

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Page 1: Original Experiment (3)

Gamin’Emerson Eggers (Human Physiology, Senior)

Rob Petrak (Human Physiology, Junior)Josh Wankum (Human Physiology, Junior)

Page 2: Original Experiment (3)

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

Page 3: Original Experiment (3)

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

Page 4: Original Experiment (3)
Page 5: Original Experiment (3)

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)

Page 6: Original Experiment (3)

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)

Page 7: Original Experiment (3)

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)

Page 8: Original Experiment (3)

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

Page 9: Original Experiment (3)

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).

Page 10: Original Experiment (3)

Too further assess the autonomic effects of video games more subjects are needed and confounding variables need to be minimized.

Improvements to be made

Page 11: Original Experiment (3)

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