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Open Access 13-11-2024 | Original Article

Acute exercise impacts heart rate variability but not cognitive flexibility during subsequent simulated firefighter occupational tasks

Authors: Philip J. Agostinelli, Nicholas C. Bordonie, Braxton A. Linder, Ann M. Robbins, Parker L. Jones, Lee F. Reagan, C. Brooks Mobley, Matthew W. Miller, William M. Murrah, JoEllen M. Sefton

Published in: European Journal of Applied Physiology

Abstract

Purpose

Acute exercise can transiently enhance cognitive flexibility. The cognitive demand of firefighters makes it relevant to understand if on-shift exercise could produce similar improvements in cognitive performance during subsequent occupational tasks. Metrics of heart rate variability (HRV), such as time- and frequency-domain outcomes, may shed light upon the influence exercise has on cognition, as they discern information related to cardiac autonomic (sympathetic/parasympathetic) function. We aimed to determine if acute resistance and aerobic exercise impact cognitive flexibility during occupational tasks and its relation to HRV.

Methods

32 participants completed a baseline Wisconsin Card Sorting Task (WCST) and three experimental trials: resistance exercise (RE), aerobic exercise (AE), or a rested control (CON). An occupational task assessment (OTA) including four rounds of 10 deadlifts and a 0.15-mile sandbag carry in an environmental chamber (35 °C/50% humidity) was completed after each trial. The second round was followed by the WCST. Repeated measures ANOVAs were used to analyze differences by condition.

Results

For the WCST, total, perseverative, and non-perseverative errors did not differ (ps > 0.39). Time-domain HRV metrics were not different (ps > 0.05). All frequency-domain metrics, other than low-frequency power, were not different (ps > 0.24). Low-frequency power was lower based on condition (p = 0.03). Post hoc analysis showed low-frequency power was lower following AE compared to RE and CON.

Conclusion

Results suggest an acute bout of on-shift aerobic or resistance exercise may not impact cognitive flexibility during subsequent simulated occupational tasks, despite depressed metrics of heart rate variability following aerobic exercise.

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Title: Acute exercise impacts heart rate variability but not cognitive flexibility during subsequent simulated firefighter occupational tasks
Authors: Philip J. Agostinelli
Nicholas C. Bordonie
Braxton A. Linder
Ann M. Robbins
Parker L. Jones
Lee F. Reagan
C. Brooks Mobley
Matthew W. Miller
William M. Murrah
JoEllen M. Sefton
Publication date: 13-11-2024
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Applied Physiology
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-024-05650-9

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Acute exercise impacts heart rate variability but not cognitive flexibility during subsequent simulated firefighter occupational tasks

Abstract

Purpose

Methods

Results

Conclusion

Podcast | Sexual health in older age

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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