Key result
Pressure-strain loop-derived global work index and global work efficiency at rest indexed by body mass are associated with cardiopulmonary exercise test-derived exercise capacity and oxygen pulse in pre-adolescent athletes.
Why the study?
Pressure-strain loop analysis correlates with contractile reserve in adult athletes, but validation in pre-adolescent basketball players and its link with aerobic capacity remained unexamined.
Are echocardiographic myocardial work indices associated with cardiopulmonary exercise test-derived aerobic capacity in pre-adolescent male athletes?
Cross-Sectional (n=19)
No
Are echocardiographic myocardial work indices associated with cardiopulmonary exercise test-derived aerobic capacity in pre-adolescent male athletes?
In pre-adolescent male basketball players, resting global work index and global work efficiency indexed by body mass significantly correlate with peak oxygen consumption and oxygen pulse, suggesting pressure-strain loop analysis is a useful non-invasive tool for evaluating the pediatric athlete's heart.
Answers are grounded in this paper and cite their sources.
May support non-invasive assessment of aerobic capacity in young athletes; hypothesis-generating, requiring prospective validation before clinical use.
Background: Pressure-strain loop (PSL) analysis provides a novel, less load-dependent non-invasive method to quantify myocardial work and demonstrates a significant correlation with the contractile reserve in adult athletes. We aim to validate PSL-derived markers in characterizing LV function in pre-adolescent basketball players by comparing results before and after the cardiopulmonary exercise test (CPX) and explore its association with CPX-derived aerobic capacity. Methods: Cardiac morphology and function in 20 pre-adolescent basketball players were assessed at 9.7 years old (9.7 ± 1.1 year) before and after cardiopulmonary exercise testing. Echocardiography was performed in all subjects, including two-dimensional speckle-tracking echocardiography (STE). Simultaneous brachial-cuff-measured blood pressure was recorded to perform PSL analysis. Results: Nineteen subjects were included in the final analysis. Exercise training in pre-adolescent males was associated with lower global work index (GWI) and global work efficiency (GWE) at rest. GWE at stress was significantly correlated with VO2max and peak O2 pulse (p = 0.0122, r = 0.56; p = 0.00122, r = 0.69, respectively). When indexed by body mass, GWI and GWE both significantly correlated with relative VO2max (p = 0.0086 and 0.0011 respectively, r = 0.58 and 0.69 respectively); GWI and GWE at baseline and stress were all significantly correlated with peak O2 pulse (GWI at baseline, p< 0.0001, r = −0.90; GWE at baseline, p< 0.0001, r = −0.89; GWI at stress, p= 0.0289, r = −0.50; GWE at stress, p< 0.0001, r = −0.83). Conclusion: PSL-analysis-derived GWI and GWE at rest indexed by body mass are associated with cardiopulmonary exercise test-derived peak oxygen consumption and oxygen pulse in pre-adolescent athletes.
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Zhao et al. (2022) conducted a cross-sectional in Healthy pre-adolescent male athletes (n=19). Cardiopulmonary exercise test vs. Baseline (rest) was evaluated on Correlation between body mass-indexed global work efficiency (GWE) and relative VO2max (r = 0.69, p=0.0011). Pressure-strain loop-derived global work index and global work efficiency at rest indexed by body mass are associated with cardiopulmonary exercise test-derived exercise capacity and oxygen pulse in pre-adolescent athletes.
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