Abstract
Objectives
To examine the effects of 15 min of high intensity treadmill running on concussion
testing assessed by the King-Devick test.
Design
Prospective Cohort Study.
Methods
Participants self-selected to either a running or a control group. At baseline both
groups were assessed using the King-Devick concussion test. The running group then
completed 15-minutes of treadmill running at rating of perceived exertion of 7–9/10
while the control group sat quietly. Both groups repeated the King-Devick test following
that 15-minute period.
Results
Participants (n = 84 men, 53 women) were divided in two groups; running or control.
Both groups, on average, had significant improvement after 15 min (suggesting a learning
effect). Comparisons between the baseline and re-assessment scores indicated impaired
performance was more common following high intensity treadmill running (n = 23 participants,
34.3%) compared to the control group (n = 10 participants, 14.3%, p = 0.006, OR = 3.44
[95%CI 1.40–8.50]). Four participants in the running group worsened their score at
reassessment by more than 3 s compared to no participants in the control group.
Conclusions
After 15 min of high intensity treadmill running, 1 in 3 participants scored a slower
time at follow-up or committed a mistake compared to baseline. Implications for clinical
practise include: the recommendation that baseline tests be conducted at rest and
after high intensity exercise to provide accurate comparisons to assist in clinical
decision making; and a cut-off of >3 s may be a clinically useful difference between resting baseline and re-assessment
using the King-Devick test.
Keywords
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Article info
Publication history
Published online: October 21, 2022
Accepted:
October 20,
2022
Received in revised form:
September 11,
2022
Received:
December 8,
2021
Identification
Copyright
© 2022 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
