Myocardial function and aerobic fitness in adolescent females

Rowland, Thomas and Unnithan, Viswanath and Roche, Denise and Garrard, Max and Holloway, Kathryn and Marwood, Simon (2011) Myocardial function and aerobic fitness in adolescent females. European Journal of Applied Physiology, 111 (9). pp. 1991-1997. ISSN 1439-6319

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A recent report indicated that variations in myocardial functional (systolic and diastolic) responses to exercise do not contribute to inter-individual differences in aerobic fitness (peak VO2) among young males. This study was designed to investigate the same question among adolescent females. Thirteen highly fit adolescent football (soccer) players (peak VO2 43.5 ± 3.4 ml kg−1 min−1) and nine untrained girls (peak VO2 36.0 ± 5.1 ml kg−1 min−1) matched for age underwent a progressive cycle exercise test to exhaustion. Cardiac variables were measured by standard echocardiographic techniques. Maximal stroke index was greater in the high-fit group (50 ± 5 vs. 41 ± 4 ml m−2), but no significant group differences were observed in maximal heart rate or arterial venous oxygen difference. Increases in markers of both systolic (ejection rate, tissue Doppler S′) and diastolic (tissue Doppler E′, mitral E velocity) myocardial functions at rest and during the acute bout of exercise were similar in the two groups. This study suggests that among healthy adolescent females, like young males, myocardial systolic and diastolic functional capacities do not contribute to inter-individual variability in physiologic aerobic fitness.

Item Type: Article
Keywords: Peak oxygen uptake, Echocardiography, Cardiac output
Subjects: Q Science > QM Human anatomy
Q Science > QP Physiology
Faculty / Department: Faculty of Science > School of Health Sciences
Depositing User: Susan Murray
Date Deposited: 06 Mar 2014 09:37
Last Modified: 27 Apr 2016 09:10

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