Effects of 7-day ketone ingestion and a physiological workload on postural stability, cognitive, and muscular exertion measures in professional firefighters

Harish Chander, Matthew J. McAllister, Angelia M. Holland, Hunter S. Waldman, Benjamin M. Krings, Jonathan C. Swain, Alana J. Turner, Steven A. Basham, John Eric W. Smith, Adam C. Knight

Research output: Contribution to journalArticle

Abstract

Background: Postural stability and cognitive performance are challenged in firefighters.The purpose of this investigation was to examine the impact of 7-day ketone supplementation onpostural stability, cognitive performance, and muscular activation before and after a physiologicalworkload. Methods: Nine professional firefighters completed two experimental sessions (preand post-workload) in a counterbalanced, double-blind design. Participants ingested either aketone salt (KS) or placebo (PLA) daily for seven days, and had an eighth ingestion 30 min priorto testing. Each experimental testing consisted of maximal voluntary contractions (MVIC) forfour muscles (knee flexors-BF, extensor-VM, ankle dorsiflexors-TA, and plantar flexors-MG)using electromyography and postural stability testing (eyes open (EO), eyes closed (EC), and eyesopen-dual-task using a FitLight™ system (EOT)), before (pre-workload) and after (post-workload)a simulated physiological workload. The workload consisted of 35 min steady state exerciseat 60% of peak oxygen consumption wearing firefighter personal protective equipment (PPE).Results: Significant differences were limited to time effects (pre-workload vs. post-workload),with no differences between groups (KS vs. PLA). Significantly lower muscle activity in VM,TA, and MG during MVIC, greater postural sway and muscle activity in BF during EC and EOT,and slower response time during EOT were evident post-workload. Conclusions: A 7-day ketonesupplementation does not impact postural stability, muscle activity, and cognitive tasks, but afatiguing workload causes significant performance reduction.

Original languageEnglish (US)
Article number15
JournalSafety
Volume5
Issue number1
DOIs
StatePublished - Jan 1 2019

Fingerprint

Firefighters
Workload
Ketones
workload
Muscle
Eating
Testing
Electromyography
Muscles
Chemical activation
Salts
Placebos
Oxygen
performance
Ankle
Oxygen Consumption
activation
Reaction Time
Knee

Keywords

  • Body balance
  • Firefighters
  • Ketones
  • Muscular exertion
  • Postural stability
  • Response times

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Public Health, Environmental and Occupational Health
  • Safety Research

Cite this

Effects of 7-day ketone ingestion and a physiological workload on postural stability, cognitive, and muscular exertion measures in professional firefighters. / Chander, Harish; McAllister, Matthew J.; Holland, Angelia M.; Waldman, Hunter S.; Krings, Benjamin M.; Swain, Jonathan C.; Turner, Alana J.; Basham, Steven A.; Smith, John Eric W.; Knight, Adam C.

In: Safety, Vol. 5, No. 1, 15, 01.01.2019.

Research output: Contribution to journalArticle

Chander, H, McAllister, MJ, Holland, AM, Waldman, HS, Krings, BM, Swain, JC, Turner, AJ, Basham, SA, Smith, JEW & Knight, AC 2019, 'Effects of 7-day ketone ingestion and a physiological workload on postural stability, cognitive, and muscular exertion measures in professional firefighters', Safety, vol. 5, no. 1, 15. https://doi.org/10.3390/safety5010015
Chander, Harish ; McAllister, Matthew J. ; Holland, Angelia M. ; Waldman, Hunter S. ; Krings, Benjamin M. ; Swain, Jonathan C. ; Turner, Alana J. ; Basham, Steven A. ; Smith, John Eric W. ; Knight, Adam C. / Effects of 7-day ketone ingestion and a physiological workload on postural stability, cognitive, and muscular exertion measures in professional firefighters. In: Safety. 2019 ; Vol. 5, No. 1.
@article{4f389440ce5d475ea1f4e359292665a4,
title = "Effects of 7-day ketone ingestion and a physiological workload on postural stability, cognitive, and muscular exertion measures in professional firefighters",
abstract = "Background: Postural stability and cognitive performance are challenged in firefighters.The purpose of this investigation was to examine the impact of 7-day ketone supplementation onpostural stability, cognitive performance, and muscular activation before and after a physiologicalworkload. Methods: Nine professional firefighters completed two experimental sessions (preand post-workload) in a counterbalanced, double-blind design. Participants ingested either aketone salt (KS) or placebo (PLA) daily for seven days, and had an eighth ingestion 30 min priorto testing. Each experimental testing consisted of maximal voluntary contractions (MVIC) forfour muscles (knee flexors-BF, extensor-VM, ankle dorsiflexors-TA, and plantar flexors-MG)using electromyography and postural stability testing (eyes open (EO), eyes closed (EC), and eyesopen-dual-task using a FitLight™ system (EOT)), before (pre-workload) and after (post-workload)a simulated physiological workload. The workload consisted of 35 min steady state exerciseat 60{\%} of peak oxygen consumption wearing firefighter personal protective equipment (PPE).Results: Significant differences were limited to time effects (pre-workload vs. post-workload),with no differences between groups (KS vs. PLA). Significantly lower muscle activity in VM,TA, and MG during MVIC, greater postural sway and muscle activity in BF during EC and EOT,and slower response time during EOT were evident post-workload. Conclusions: A 7-day ketonesupplementation does not impact postural stability, muscle activity, and cognitive tasks, but afatiguing workload causes significant performance reduction.",
keywords = "Body balance, Firefighters, Ketones, Muscular exertion, Postural stability, Response times",
author = "Harish Chander and McAllister, {Matthew J.} and Holland, {Angelia M.} and Waldman, {Hunter S.} and Krings, {Benjamin M.} and Swain, {Jonathan C.} and Turner, {Alana J.} and Basham, {Steven A.} and Smith, {John Eric W.} and Knight, {Adam C.}",
year = "2019",
month = "1",
day = "1",
doi = "10.3390/safety5010015",
language = "English (US)",
volume = "5",
journal = "Safety",
issn = "2313-576X",
number = "1",

}

TY - JOUR

T1 - Effects of 7-day ketone ingestion and a physiological workload on postural stability, cognitive, and muscular exertion measures in professional firefighters

AU - Chander, Harish

AU - McAllister, Matthew J.

AU - Holland, Angelia M.

AU - Waldman, Hunter S.

AU - Krings, Benjamin M.

AU - Swain, Jonathan C.

AU - Turner, Alana J.

AU - Basham, Steven A.

AU - Smith, John Eric W.

AU - Knight, Adam C.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Background: Postural stability and cognitive performance are challenged in firefighters.The purpose of this investigation was to examine the impact of 7-day ketone supplementation onpostural stability, cognitive performance, and muscular activation before and after a physiologicalworkload. Methods: Nine professional firefighters completed two experimental sessions (preand post-workload) in a counterbalanced, double-blind design. Participants ingested either aketone salt (KS) or placebo (PLA) daily for seven days, and had an eighth ingestion 30 min priorto testing. Each experimental testing consisted of maximal voluntary contractions (MVIC) forfour muscles (knee flexors-BF, extensor-VM, ankle dorsiflexors-TA, and plantar flexors-MG)using electromyography and postural stability testing (eyes open (EO), eyes closed (EC), and eyesopen-dual-task using a FitLight™ system (EOT)), before (pre-workload) and after (post-workload)a simulated physiological workload. The workload consisted of 35 min steady state exerciseat 60% of peak oxygen consumption wearing firefighter personal protective equipment (PPE).Results: Significant differences were limited to time effects (pre-workload vs. post-workload),with no differences between groups (KS vs. PLA). Significantly lower muscle activity in VM,TA, and MG during MVIC, greater postural sway and muscle activity in BF during EC and EOT,and slower response time during EOT were evident post-workload. Conclusions: A 7-day ketonesupplementation does not impact postural stability, muscle activity, and cognitive tasks, but afatiguing workload causes significant performance reduction.

AB - Background: Postural stability and cognitive performance are challenged in firefighters.The purpose of this investigation was to examine the impact of 7-day ketone supplementation onpostural stability, cognitive performance, and muscular activation before and after a physiologicalworkload. Methods: Nine professional firefighters completed two experimental sessions (preand post-workload) in a counterbalanced, double-blind design. Participants ingested either aketone salt (KS) or placebo (PLA) daily for seven days, and had an eighth ingestion 30 min priorto testing. Each experimental testing consisted of maximal voluntary contractions (MVIC) forfour muscles (knee flexors-BF, extensor-VM, ankle dorsiflexors-TA, and plantar flexors-MG)using electromyography and postural stability testing (eyes open (EO), eyes closed (EC), and eyesopen-dual-task using a FitLight™ system (EOT)), before (pre-workload) and after (post-workload)a simulated physiological workload. The workload consisted of 35 min steady state exerciseat 60% of peak oxygen consumption wearing firefighter personal protective equipment (PPE).Results: Significant differences were limited to time effects (pre-workload vs. post-workload),with no differences between groups (KS vs. PLA). Significantly lower muscle activity in VM,TA, and MG during MVIC, greater postural sway and muscle activity in BF during EC and EOT,and slower response time during EOT were evident post-workload. Conclusions: A 7-day ketonesupplementation does not impact postural stability, muscle activity, and cognitive tasks, but afatiguing workload causes significant performance reduction.

KW - Body balance

KW - Firefighters

KW - Ketones

KW - Muscular exertion

KW - Postural stability

KW - Response times

UR - http://www.scopus.com/inward/record.url?scp=85071441627&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071441627&partnerID=8YFLogxK

U2 - 10.3390/safety5010015

DO - 10.3390/safety5010015

M3 - Article

AN - SCOPUS:85071441627

VL - 5

JO - Safety

JF - Safety

SN - 2313-576X

IS - 1

M1 - 15

ER -