Effect of acute exposure to moderate altitude on kinematic variables of the ipponseoi- nage and its relationship with the countermovement jump in elite judokas
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AuthorAlmeida, Filipa; Bonitch Gongora, Juan Germán; Padial Puche, Paulino; Fuente, Blanca de la; Morales Artacho, Antonio Jesús; Feriche Fernández-Castanys, María Belén
Almeida F, Bonitch-Go´ngora J, Padial P, de la Fuente B, Morales-Artacho AJ, Feriche B (2018) Effect of acute exposure to moderate altitude on kinematic variables of the ippon-seoinage and its relationship with the countermovement jump in elite judokas. PLoS ONE 13(10): e0206297.
SponsorshipThis study was funded by the Spanish Ministry of Economy and Competitiveness (DEP2015-64350-P MINECO/FEDER), and by a FPI pre-doctoral grant (BES-2016- 078035) awarded to one of the authors (FA),
This study aimed to assess the effect of acute exposure to moderate altitude on kinematic variables of the ippon-seoi-nage and on the mechanical outputs of the countermovement jump (CMJ). Thirteen elite male judokas from the Spanish Judo Training Centre in Valencia (age: 21.54 ± 2.15 years) participated in the study. All of them performed an incremental CMJ test and an ippon-seoi-nage technique test before (N) and after the ascent to a moderate altitude of 2320 m above the sea level (H). A linear velocity transducer was attached to the bar to assess the mechanical outputs of each loaded CMJ at different percentages of their own body weight (25, 50, 75 and 100%). A wearable sensor was used to assess the kinematic variables (times, accelerations and angular velocities) transferred to a dummy during the technique test. The kinematic variables showed great individual reliability (CV = 8.46% in N; CV = 8.37% in H), which contrasted with low reliability observed when the whole group was considered. The smallest important CV ratio (>1.15) showed that H caused changes in the reliability of the kinematic variables, with some variables becoming more reliable and others losing the reliability they had in N. H also caused small increments in peak velocity across all loads tested in the CMJ (+3.67%; P<0.05). In contrast, no changes in the kinematic variables were verified.