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首页> 外文期刊>Journal of science and medicine in sport >Variability in locomotor activity in a female junior international hockey team
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Variability in locomotor activity in a female junior international hockey team

机译：Variability in locomotor activity in a female junior international hockey team

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Objectives: The purpose of this study was to estimate between and within-athlete variabilities, to form threshold values for interpreting changes in locomotor activity in a female junior international hockey team.Design: Thirty-three female international hockey players (age: 20 +/- 0.9 year; height: 166.1 +/- 4.4 cm; body mass: 62.5 +/- 6.2 kg) competed in thirty-four junior international hockey games.. Methods: Data were monitored through global positioning system technology. Locomotor activity was quantified as relative distances covered by players for each quarter at three speed zones (20 km/h). Data were analysed using linear mixed models, accounting for the fixed effects of position (defenders, n = 13; midfielders, n = 8; forwards, n = 12), game result, type, location, and oppo-sition rank. Variabilities are summarised as coefficients of variation (%CV). Results: Variabilities in athletes' game-to-game and quarter-to-quarter locomotor activity differed substantially between lower (20 km/h) speed zones. Game-to-game variability of low-speed movement (20 km/h) running were 22% and 34%, respectively. Within-athlete quarter-to-quarter variability increased for each speed zone, and was greatest for midfielders in low-speed movement and for defenders in high and very high-speed running.Conclusions: The game-to-game variabilities inform thresholds for estimating changes in performance over time. Caution is required when interpreting such data, and coaches should carry out estimates in their specific contexts. Additionally, quarter-to-quarter variabilities in high-and very high-speed running for junior international hockey players outline position specific differences informing training practices to better prepare players for game demands.(c) 2022 The Author(s). Published by Elsevier Ltd on behalf of Sports Medicine Australia. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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