The effects of detraining and retraining periods on fat-mass and fat-free mass in elite male soccer players

Suarez-Arrones, Luis, Lara-Lopez, Pilar, Maldonado, Rafael, Torreno, Nacho, De Hoyo, Moises, Nakamura, Fabio Yuzo, Salvo, Valter Di, and Mendez-Villanueva, Alberto (2019) The effects of detraining and retraining periods on fat-mass and fat-free mass in elite male soccer players. PeerJ, 7. e7466.

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Abstract

The aim of the study was to examine the effects of a detraining period (DTP) (i.e., offseason) with an individually prescribed training program, and a retraining period (RTP) (i.e., pre-season) combining soccer and flywheel-based strength training on fat-free mass (FFM) and fat-mass (FM) in 10 elite professional male soccer players. The present study used a controlled repeated-measures research design to investigate the changes in FFM and FM using dual-energy X-ray absorptiometry. Whole body %FM increased (effect size (ES) = 0.87 ± 0.46) and FFM reduced after DTP (ES = -0.30 ± 0.19), returning to values comparable to the end of the previous season after RTP. At regional levels, arms, legs, and trunk %FM increased (ES = from 0.42 to 1.29) while trunk-FFM was reduced (ES=-0.40±0.26) after DTP, returning to the values observed at the end of the previous season after RTP. Legs-FFM did not change after DTP, with a substantial increase after RTP in comparison with pre-season values (ES = 0.34 ± 0.29 and 0.53 ± 0.36 for the right and left leg, respectively). Despite the small sample size of the present study, the findings indicate that elite soccer players can be allowed 2 weeks of rest during a five-week DTP, since the changes in %FM and FFM were relatively small, and FM and FFM returned to the optimal initial values for competition after the proposed RTP during the pre-season.

Item ID: 62069
Item Type: Article (Research - C1)
ISSN: 2167-8359
Keywords: Football, Inertial devices, Neuromuscular training, Power
Copyright Information: Copyright © 2019 Suarez-Arrones et al. Distributed under Creative Commons CC-BY 4.0
Funders: National Priorities Research Program (NPRP), Qatar National Research Fund (QNRF)
Projects and Grants: NPRP 6-1526-3-363
Date Deposited: 10 May 2020 22:14
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1106 Human Movement and Sports Science > 110602 Exercise Physiology @ 50%
11 MEDICAL AND HEALTH SCIENCES > 1106 Human Movement and Sports Science > 110601 Biomechanics @ 50%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970111 Expanding Knowledge in the Medical and Health Sciences @ 100%
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