Browsing by Subject "Racket sports"

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    Open Access
    Design, validation, and reliability of an observational instrument for technical and tactical actions in singles badminton
    (Frontiers Media, 2020-12-10) Torres-Luque, Gema; Blanca-Torres, Juan Carlos; Cabello-Manrique, David; Giménez Egido, José María; Ortega Toro, Enrique; Actividad Física y Deporte
    Technical and tactical actions are decisive in terms of badminton player competitive performance. The main objective of this research was to design, validate, and estimate the reliability of an observational instrument for the analysis of the tactical and technical actions in individual badminton. The process was carried out in four different steps: first, there was a review of the scientific literature and a preliminary list of variables was made; second, a qualitative and quantitative assessment was completed by 10 badminton expert judges; in the third step, the content validity was estimated using Aiken’s V coefficient; finally, intra-observer reliability and interobserver reliability were tested by two observers specialized in badminton using the Cohen’s Kappa coefficient and the intraclass correlation coefficient. Strokes were used as the unit of measure by our observational instrument; every time badminton players hit the shuttlecock, 22 variables (eight contextual variables, seven variables related to the result of the match, and seven variables related to the game) are observed. The minimum Aiken’s value was 0.58, and reliability was 0.63. In spite of these values, none of the variables had to be removed, but there were modifications in terms of drafting in some of them. The main findings confirmed the validity and the usefulness of this instrument.
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    Publication
    Open Access
    Identification of games and sex-related activity profile in junior international badminton
    (Taylor and Francis Group, Routledge, 2020-04-15) Rojas-Valverde, Daniel; Gómez-Carmona, Carlos David; Fernández-Fernández, Jaime; García-López, Juan; García-Tormo, Vicente; Cabello-Manrique, David; Pino Ortega, José; Actividad Física y Deporte
    The aims of the present study were (a) to analyse the activity profile in U’18 Badminton players during an international tournament and (b) to compare the games and sex-related differences. Twenty-four players (women = 14; men = 10) were assessed using inertial measurement units with ultra-wideband indoor tracking system. Eleven variables were extracted after principal component analysis (PCA). Differences between games and gender were performed by mixed analysis of variance. In men, PCA of the whole game explained 89.2% and in women 75.7%. The most representative variables in men’s and women’s were relative distance and maximum accelerations (PC1). The players’ activity profile was (men vs women) 44.6 ± 3.8 vs 43.5 ± 5.2 m/min in relative distance, 25.9 ± 1.9 vs 24.7 ± 1.9 n/min in relative acceleration, 3.87 ± 0.3 vs 3.47 ± 0.4 m/s2 in maximum acceleration, 175.5 ± 9.4 vs 173.2 ± 15.6 bpm in average heart rate. Sex-related differences were found in maximum accelerations (p < 0.01) and relative accelerations (p < 0.01) and in relative distance by games. The workload dynamics during games and between sexes should be addressed by team staff in order to develop effective tactical and recovery strategies during badminton tournaments.