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Open AccessArticle

Influence of Body Composition on Post-Exercise Parasympathetic Reactivation of Firefighter Recruits

1
Health Assessment Laboratory, University of Massachusetts Lowell, Lowell, MA 01854, USA
2
Center for Population Health, University of Massachusetts Lowell, Lowell, MA 01854, USA
3
Department of Physical Therapy and Kinesiology, University of Massachusetts Lowell, Lowell, MA 01854, USA
4
Department of Biomedical and Nutritional Sciences, University of Massachusetts Lowell, Lowell, MA 01854, USA
5
Human Performance and Sport Physiology Laboratory, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
6
Department of Occupational Sciences and Technology, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2021, 18(1), 339; https://doi.org/10.3390/ijerph18010339
Received: 31 October 2020 / Revised: 2 January 2021 / Accepted: 3 January 2021 / Published: 5 January 2021
(This article belongs to the Special Issue Testing and Physical Conditioning for Tactical Populations)
Firefighters have a sustained risk for experiencing a sudden cardiac event after completing a fire call. Heart rate recovery (HRR) can be utilized to characterize autonomic nervous system (ANS) recovery and has been linked to cardiac events. Research suggests that body composition influences post-exercise HRR responses in non-firefighter populations. The purpose of this study was to examine the influence of body mass index (BMI), waist circumference (WC), and percent body fat (BF) on the HRR response of firefighter recruits. BMI (kg·m−2), WC (cm), and BF (%) data from 57 firefighter recruits were collected. HRR (b·min−1) data were collected at completion (HR0), as well as 15 (HR15), 30 (HR30), 45 (HR45), 60 (HR60), 120 (HR120), and 180 (HR180) seconds following a submaximal step test, and commonly utilized clinical HRR indices were calculated (ΔHRR30, ΔHRR60, ΔHRR120, and ΔHRR180). After controlling for sex, linear mixed regression models did not identify significant interactions between body composition (ps > 0.05) and HRR response across time. However, significant (ps < 0.05) indirect semi-partial correlations were identified between BF and ΔHRR30 (rsp = −0.31) and ΔHRR60 (rsp = −0.27), respectively. Reducing overall BF (vs. BMI or WC) should be prioritized to improve the post-exercise ANS recovery of firefighter recruits. View Full-Text
Keywords: autonomic nervous system; heart rate recovery; obesity; body mass index; waist circumference; percent body fat; tactical athletes autonomic nervous system; heart rate recovery; obesity; body mass index; waist circumference; percent body fat; tactical athletes
MDPI and ACS Style

Cornell, D.J.; Noel, S.E.; Zhang, X.; Ebersole, K.T. Influence of Body Composition on Post-Exercise Parasympathetic Reactivation of Firefighter Recruits. Int. J. Environ. Res. Public Health 2021, 18, 339. https://doi.org/10.3390/ijerph18010339

AMA Style

Cornell DJ, Noel SE, Zhang X, Ebersole KT. Influence of Body Composition on Post-Exercise Parasympathetic Reactivation of Firefighter Recruits. International Journal of Environmental Research and Public Health. 2021; 18(1):339. https://doi.org/10.3390/ijerph18010339

Chicago/Turabian Style

Cornell, David J.; Noel, Sabrina E.; Zhang, Xiyuan; Ebersole, Kyle T. 2021. "Influence of Body Composition on Post-Exercise Parasympathetic Reactivation of Firefighter Recruits" Int. J. Environ. Res. Public Health 18, no. 1: 339. https://doi.org/10.3390/ijerph18010339

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Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

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