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

Author

Listed:
  • David J. Cornell

    (Health Assessment Laboratory, University of Massachusetts Lowell, Lowell, MA 01854, USA
    Center for Population Health, University of Massachusetts Lowell, Lowell, MA 01854, USA
    Department of Physical Therapy and Kinesiology, University of Massachusetts Lowell, Lowell, MA 01854, USA)

  • Sabrina E. Noel

    (Health Assessment Laboratory, University of Massachusetts Lowell, Lowell, MA 01854, USA
    Center for Population Health, University of Massachusetts Lowell, Lowell, MA 01854, USA
    Department of Biomedical and Nutritional Sciences, University of Massachusetts Lowell, Lowell, MA 01854, USA)

  • Xiyuan Zhang

    (Center for Population Health, University of Massachusetts Lowell, Lowell, MA 01854, USA)

  • Kyle T. Ebersole

    (Human Performance and Sport Physiology Laboratory, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
    Department of Occupational Sciences and Technology, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA)

Abstract

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 (HR 0 ), as well as 15 (HR 15 ), 30 (HR 30 ), 45 (HR 45 ), 60 (HR 60 ), 120 (HR 120 ), and 180 (HR 180 ) seconds following a submaximal step test, and commonly utilized clinical HRR indices were calculated (ΔHRR 30 , ΔHRR 60 , ΔHRR 120 , and ΔHRR 180 ). After controlling for sex, linear mixed regression models did not identify significant interactions between body composition ( p s > 0.05) and HRR response across time. However, significant ( p s < 0.05) indirect semi-partial correlations were identified between BF and ΔHRR 30 ( r sp = −0.31) and ΔHRR 60 ( r sp = −0.27), respectively. Reducing overall BF (vs. BMI or WC) should be prioritized to improve the post-exercise ANS recovery of firefighter recruits.

Suggested Citation

  • David J. Cornell & Sabrina E. Noel & Xiyuan Zhang & Kyle T. Ebersole, 2021. "Influence of Body Composition on Post-Exercise Parasympathetic Reactivation of Firefighter Recruits," IJERPH, MDPI, vol. 18(1), pages 1-8, January.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:1:p:339-:d:474885
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    Cited by:

    1. David J. Cornell & Stacy L. Gnacinski & Kyle T. Ebersole, 2021. "Functional Movement Quality of Firefighter Recruits: Longitudinal Changes from the Academy to Active-Duty Status," IJERPH, MDPI, vol. 18(7), pages 1-10, April.

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