Biology of Sport
eISSN: 2083-1862
ISSN: 0860-021X
Biology of Sport
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4/2020
vol. 37
 
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abstract:
Original paper

Accelerometry-based variables in professional soccer players: Comparisons between periods of the season and playing positions

Filipe Manuel Clemente
1, 2
,
Rui Silva
1
,
Rodrigo Ramirez-Campillo
3, 4
,
José Afonso
5
,
Bruno Mendes
6
,
Yung-Sheng Chen
7

1.
Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal
2.
Instituto de Telecomunicações, Delegação da Covilhã, Lisboa 1049-001, Portugal
3.
Human Performance Laboratory. Quality of Life and Wellness Research Group. Department of Physical Activity Sciences, Universidad de Los Lagos. Lord Cochrane 1046, Osorno, Chile
4.
Centro de Investigación en Fisiología del Ejercicio. Facultad de Ciencias, Universidad Mayor. Santiago, Av Libertador Bernardo O’Higgins 2027, Chile
5.
Centre for Research, Education, Innovation and Intervention in Sport. Faculty of Sport. University of Porto, Porto, Portugal
6.
University of Lisboa, Faculty of Human Kinetics, Lisboa, Portugal
7.
Department of Exercise and Health Sciences, University of Taipei, Taipei
Biol Sport. 2020;37(4):389–403.
Online publish date: 2020/07/14
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The aim of this study was to provide reference data of variation in external training loads for weekly periods within the annual season. Specifically, we aimed to compare the weekly acute load, monotony, and training strain of accelerometry-based measures across a professional soccer season (pre-season, first and second halves of the season) according to players’ positions. Nineteen professional players were monitored daily for 45 weeks using an 18-Hz global positioning system to obtain measures of high metabolic load distance (HMLD), impacts, and high intensity accelerations and decelerations. Workload indices of acute load, training monotony, and training strain were calculated weekly for each of the measures. The HMLD had greater training strain values in the pre-season than in the first (p ≤ 0.001; d = 0.793) and second halves of the season (p ≤ 0.001; d = 0.858). Comparisons between playing positions showed that midfielders had the highest weekly acute load of HMLD (6901 arbitrary units [AU]), while central defenders had the lowest (4986 AU). The pre-season period was associated with the highest acute and strain load of HMLD and number of impacts, with a progressive decrease seen during the season. In conclusion, coaches should consider paying greater attention to variations in HMLD and impacts between periods of the season and between players to individualize training accordingly.
keywords:

Football, athletic performance, physiologic monitoring, external load, workload, training monotony, training strain

 
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