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Sports (Basel). 2018 Aug 10;6(3). pii: E78. doi: 10.3390/sports6030078.

Adolescent Finswimmers: Early Myocardial Adaptations in Different Swimming Styles.

Author information

1
Laboratory of Cardio-Pulmonary Testing, Department of Respiratory Medicine, University of Thessaly, 41110 Larissa, Greece. vasileiosstavrou@hotmail.com.
2
School of Physical Education and Sports Science, University of Thessaly, Karyes, 42100 Trikala, Greece. vasileiosstavrou@hotmail.com.
3
Cardiological Department, General University Hospital of Larissa, 41222 Larissa, Greece. ktsarouhas14@yahoo.gr.
4
Laboratory of Cardio-Pulmonary Testing, Department of Respiratory Medicine, University of Thessaly, 41110 Larissa, Greece. ekaretsi@med.uth.gr.
5
Laboratory of Cardio-Pulmonary Testing, Department of Respiratory Medicine, University of Thessaly, 41110 Larissa, Greece. panmichos@yahoo.gr.
6
Laboratory of Cardio-Pulmonary Testing, Department of Respiratory Medicine, University of Thessaly, 41110 Larissa, Greece. zdaniil@med.uth.gr.
7
Laboratory of Cardio-Pulmonary Testing, Department of Respiratory Medicine, University of Thessaly, 41110 Larissa, Greece. kgourg@med.uth.gr.

Abstract

BACKGROUND:

The purpose of our study was to investigate early differences in the adolescent female finswimmers' echocardiography parameters, possibly associated with different swimming-style training and different training equipment (monofin (MF) versus bifin (BF)).

METHOD:

Forty-three female finswimmers participated in our study (age: 15.6 ± 2.1 years, body mass index: 20.4 ± 2.2 kg/m², body surface area: 1.56 ± 0.04 m², body fat: 11.2 ± 0.6%) and were divided into two groups, according to the swimming style practiced (MF vs BF). Anthropometric characteristics, echocardiography and arterial pressure were measured. The independent t-test was used for statistical comparisons between groups. Stepwise multivariate regression analysis was applied to investigate associations between various variables.

RESULTS:

The two groups used training equipment with different weights (p < 0.001). Female adolescent finswimmers presented signs of myocardial hypertrophy depicted by the increased left ventricle myocardial mass indexed to body surface area (101.34 ± 23.65). Different patterns of myocardial hypertrophy were observed for the two groups; MF swimmers presented concentric hypertrophy, while BF swimmers presented eccentric hypertrophy (relative wall thickness MF = 0.46 ± 0.08 vs BF = 0.39 ± 0.06 cm, p < 0.05). MF swimmers had also higher left ventricular posterior wall diameters (p < 0.05), lower stroke volume values (p < 0.05) and lower ejection fraction (p < 0.05) compared to BF athletes.

CONCLUSION:

Adolescent female finswimmers presented different patterns of myocardial hypertrophy possibly related to different training protocols and modes of exercise.

KEYWORDS:

adolescent; bifin; monofin; myocardial hypertrophy

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