ORIGINAL ARTICLE  SPORT CARDIOLOGY 

The Journal of Sports Medicine and Physical Fitness 2021 September;61(9):1290-1300

DOI: 10.23736/S0022-4707.20.11615-3

Copyright © 2020 EDIZIONI MINERVA MEDICA

lingua: Inglese

Relationship between echocardiogram and physical parameters in experienced resistance trainers: a pilot study

Daniel A. HACKETT ¹ ✉, Lachlan MITCHELL ², Jillian L. CLARKE ¹, Amanda D. HAGSTROM ³, Justin KEOGH ^{4, 5, 6, 7}, Chris MCLELLAN ⁸

¹ Exercise, Health and Performance Faculty Research Group, School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Lidcombe, Australia; ² National Nutrition Surveillance Center, School of Public Health, Physiotherapy and Sport Science, University College Dublin, Dublin, Ireland; ³ School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, Australia; ⁴ Faculty of Health Sciences and Medicine, Bond University, Robina, Australia; ⁵ Sports Performance Research Center New Zealand, AUT University, Auckland, New Zealand; ⁶ Cluster for Health Improvement, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Australia; ⁷ Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India; ⁸ School of Health and Wellbeing, Faculty of Health, Engineering and Sciences, University of Southern Queensland, Ipswich, Australia

BACKGROUND: A paucity of research exists concerning physiological factors influencing heart structure and function in strength athletes. This pilot study investigated whether body composition and muscle performance are associated with indices of cardiac structure and function in experienced resistance trainers.
METHODS: A cross-sectional study designed was employed to address the study aim. Seventeen males (median age 33.0 years) and eight females (median age 32.5 years) with backgrounds in bodybuilding and powerlifting participated in this study. Muscle performance, body composition and echocardiographic measures were performed. Mann-Whitney U-tests were used to examine differences between males and females. Spearman’s Rho partial correlation analyses (adjusting for sex) were conducted to examine relationships between physical and echocardiogram parameters.
RESULTS: Moderate to strong positive correlations were found between fat-free mass and aortic root, right ventricular internal dimension, interventricular septum thickness, left ventricular posterior wall thickness, left atrium area, left ventricular end-diastolic volume, and left ventricular end-systolic volume (r: 0.43-0.76, P≤0.03). Moderate to strong positive correlations were found between leg press 1RM and aortic root, left ventricular internal dimension diastole, left atrium area, left ventricular end-diastolic volume, and left ventricular end-systolic volume (r: 0.49-0.67, P≤0.02).
CONCLUSIONS: Resistance trainers with greater fat-free mass and lower body strength appear to have larger cardiac structures. Changes in heart size and function are likely to result from long-term strenuous resistance training. Due to the suspected prevalence of performance enhancing drug use among powerlifters and bodybuilders, care is required to rule out pathological conditions.

KEY WORDS: Athletes; Exercise-induced cardiomegaly; Weight lifting; Heart function tests; Physiological adaptation