Effects of 7-Day Ketone Ingestion and a Physiological Workload on Postural Stability, Cognitive, and Muscular Exertion Measures in Professional Firefighters

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dc.contributor.authorChander, Harish
dc.contributor.authorMcAllister, Matthew
dc.contributor.authorHolland, Angelia
dc.contributor.authorWaldman, Hunter
dc.contributor.authorKrings, Benjamin M.
dc.contributor.authorSwain, Jonathan
dc.contributor.authorTurner, Alana
dc.contributor.authorBasham, Steven
dc.contributor.authorSmith, John Eric W.
dc.contributor.authorKnight, Adam
dc.date.accessioned2019-08-02T15:01:39Z
dc.date.available2019-08-02T15:01:39Z
dc.date.issued2019-03
dc.description.abstractBackground: Postural stability and cognitive performance are challenged in firefighters. The purpose of this investigation was to examine the impact of 7-day ketone supplementation on postural stability, cognitive performance, and muscular activation before and after a physiological workload. Methods: Nine professional firefighters completed two experimental sessions (pre- and post-workload) in a counterbalanced, double-blind design. Participants ingested either a ketone salt (KS) or placebo (PLA) daily for seven days, and had an eighth ingestion 30 min prior to testing. Each experimental testing consisted of maximal voluntary contractions (MVIC) for four 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 eyes open-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 exercise at 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 ketone supplementation does not impact postural stability, muscle activity, and cognitive tasks, but a fatiguing workload causes significant performance reduction.
dc.description.departmentHealth and Human Performance
dc.formatText
dc.format.extent11 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationChander, H., McAllister, M. J., Holland, A. M., Waldman, H. S., Krings, B. M., Swain, J. C., Turner, A. J., Basham, S. A., Smith, J. E. W., & Knight, A. C. (2019). Effects of 7-Day ketone ingestion and a physiological workload on postural stability, cognitive, and muscular exertion measures in professional firefighters. Safety. 5(1): 15.
dc.identifier.doihttps://doi.org/10.3390/safety5010015
dc.identifier.urihttps://hdl.handle.net/10877/8441
dc.language.isoen
dc.publisherMultidisciplinary Digital Publishing Institute
dc.rights.holder© 2019 The Authors.
dc.rights.licenseThis work is licensed under a Creative Commons Attribution 4.0 International License.
dc.sourceSafety, 2019, Vol. 5, No. 1, Article 15.
dc.subjectketones
dc.subjectmuscular exertion
dc.subjectpostural stability
dc.subjectbody balance
dc.subjectresponse times
dc.subjectfirefighters
dc.subjectHealth and Human Performance
dc.titleEffects of 7-Day Ketone Ingestion and a Physiological Workload on Postural Stability, Cognitive, and Muscular Exertion Measures in Professional Firefighters
dc.typeArticle

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