Impact of contextual factors on external load during a congested-fixture tournament in elite U'18 basketball players

Pino-Ortega, José, Rojas-Valverde, Daniel, Gómez-Carmona, Carlos David, Bastida-Castillo, Alejandro, Hernández-Belmonte, Alejandro, García-Rubio, Javier, Nakamura, Fabio Yuzo, and Ibáñez, Sergio José (2019) Impact of contextual factors on external load during a congested-fixture tournament in elite U'18 basketball players. Frontiers in Psychology, 10. 1100.

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An understanding of basketball physical demands during official matches is fundamental for designing specific training, tactical, and strategic plans as well as recovery methods during congested fixture periods. Such assessments can be performed using wearable indoor time motion tracking systems. The purpose of this study was to analyze the time-motion profile of under 18-years of age (U'18) basketball players and compare their physical demands in relation to team ranking, playing position, match periods and consecutive matches during a 7-day tournament. Relative Distance (RD), percentage of High-Intensity Running (%HIR), Player Load (PL), Acceleration (Acc), Deceleration (Dec), Peak Speed (PSpeed), and Peak Acceleration (PAcc) were recorded from 94 players (13 centers, 47 forwards, and 34 guards) belonging to eight elite teams (age: 17.6 ± 0.8 years; height: 1.91 ± 0.08 m; body mass: 82.5 ± 8.8 kg). WIMU PROTM inertial measurement units with ultra-wide band (UWB) indoor-tracking technology recorded 13 matches during the Adidas Next Generation Tournament Finals in the 2016-2017 season. Paired t-tests and one-way analyses of variance with omega partial squared (ωp2) and Cohen's effect sizes (d) were used to analyze for differences between variables. According to team quality, the best teams had lower RD (p = 0.04; d = -0.14). Guards presented higher RD (p < 0.01; ωp2 = 0.03), PSpeed (p < 0.01; ωp2 = 0.01) and PAcc (p < 0.01; ωp2 = 0.02) compared to forwards and centers. The first quarter showed differences with higher RD (p < 0.01; ωp2 = 0.03), %HIR (p < 0.01; ωp2 = 0.02), and PL (p < 0.01; ωp2 = 0.04) compared to all other quarters. The third match of the tournament presented higher demands in RD (p < 0.01; ωp2 = 0.03), HIR (p < 0.01; ωp2 = 0.01) and PL (p < 0.01; ωp2 = 0.02) compared with the first two matches. This study showed that team quality, playing position, match period, and consecutive matches throughout an U'18 basketball tournament influenced the kinematic demands experienced by players during official competition. Therefore, each of these contextual factors should be considered in managing the load and developing individualized strategies for players in tournament settings.

Item ID: 62056
Item Type: Article (Research - C1)
ISSN: 1664-1078
Keywords: External load, Indoor, Kinematics, Team sports, Ultra-wide band
Copyright Information: © 2019 Pino-Ortega, Rojas-Valverde, Gómez-Carmona, Bastida-Castillo, Hernández-Belmonte, García-Rubio, Nakamura and Ibáñez. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Funders: Spanish Ministry of Education, Culture and Sport, Aid to Research Groups (Ayuda a los Grupos de Investigación), Government of Extremadura (Department of Economy and Infrastructure), European Regional Development Funds (FEDER)
Projects and Grants: (FPU17/00407), (GR18170)
Date Deposited: 07 May 2020 23:41
FoR Codes: 42 HEALTH SCIENCES > 4207 Sports science and exercise > 420702 Exercise physiology @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970111 Expanding Knowledge in the Medical and Health Sciences @ 100%
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