RESUMO
ABSTRACT: Diniz, R, Del Vecchio, FB, Schaun, GZ, Oliveira, HB, Portella, EG, da Silva, ES, Formalioni, A, Campelo, PCC, Peyré-Tartaruga, LA, and Pinto, SS. Kinematic comparison of the roundhouse kick between taekwondo, karate, and muaythai. J Strength Cond Res 35(1): 198-204, 2021-The roundhouse kick (RHK) is frequently executed in taekwondo, karate, and muaythai because of its high technical effectiveness during combat. The purpose of this study was to compare kinematic characteristics during RHK performance between taekwondo, karate, and muaythai athletes. Forty-seven male athletes (25.5 ± 4.7 years, 1.75 ± 0.1 m, and 75.8 ± 11.5 kg) volunteered to participate (taekwondo: 17; karate: 15; and muaythai: 15). Self-selected distance from target, mean and peak fifth metatarsus linear velocity (LV5mean; LV5peak), mean and peak hip (HAVmean; HAVpeak) and knee (KAVmean; KAVpeak) angular velocities, as well as target linear acceleration (TLA) were analyzed with a 3D video motion analysis system. Comparisons between modalities were performed with 1-way analysis of variances and Bonferroni's post hoc test (α = 0.05). Self-selected distance was lower in muaythai compared with taekwondo and karate (p < 0.001). Also, karate had greater LV5mean compared with muaythai (p = 0.001), and muaythai showed higher HAVmean than karate (p = 0.011). In addition, HAVpeak was greater in muaythai than in taekwondo and karate (p < 0.001). No differences were found for KAVmean, KAVpeak, and TLA. Although it is similarly described between modalities, RHK showed distinct kinematic characteristics between taekwondo, karate, and muaythai. Based on these results, coaches and athletes can improve their RHK technique according to the specificities of each combat sport. Specifically, it is suggested that combat strategies should aim to increase the distance from the opponent during combat for muaythai athletes, whereas taekwondo and karate athletes should focus on decreasing it.
Assuntos
Artes Marciais , Atletas , Fenômenos Biomecânicos , Humanos , Joelho , Articulação do Joelho , MasculinoRESUMO
Objetivos: Verificar a frequência, as características e os métodos usados para a perda rápida de peso por lutadores de Taekwondo do estado do Rio Grande do Sul.Métodos: Um estudo transversal recrutou atletas que preencheram os seguintes critérios de inclusão: a) ser lutador de Taekwondo, b) graduado em faixa preta e c) competidor no evento em que ocorreu a coleta dos dados. A coleta dos dados foi realizada durante a primeira etapa do Circuito Costa Doce Seletiva para Seleção Gaúcha, em 2013. Os dados foram coletados com questionário validado sobre perda de peso em lutadores, composto por três seções, preenchido antes da pesagem.Resultados: Dos 23 voluntários, 21 (91,3%) relataram perder peso para competir. A maioria perdeu entre 1 e 3 kg no período anterior à competição, durante três a quatro dias, até duas vezes por ano, através dos seguintes métodos: aumento de atividade física, omissão de refeições e restrição da ingestão hídrica. A maioria dos homens perdeu de 1 a 2 kg e as mulheres entre 1 e 2,5 kg. Os homens recuperaram até 2 kg após a pesagem, enquanto as mulheres chegaram a recuperar até 7 kg. O mestre foi a pessoa que mais os influenciou.Conclusões: Observou-se alta freqência da rápida redução de peso em atletas de Taekwondo. O profissional citado como maior influente na perda de peso foi o mestre. Os métodos mais utilizados foram o aumento de atividade física, diminuição na ingestão de alimentos e restrição hídrica...
AIMS: To assess frequency, characteristics and methods used for rapid weight loss by Taekwondo fighters in the state of Rio Grande do SulMETHODS: A cross-sectional study recruited athletes who met the following inclusion criteria: a) to be a Taekwondo fighter, b) to have a black belt degree c) being competitor in the event in which data collection occurred. Data collection took place during the first stage of the Costa Doce Circuit - Selective to State Team in 2013. Data were collected using a validated questionnaire on weight loss in wrestlers, consisting of three sections, completed before weighing.RESULTS: Of the 23 volunteers, 21 (91.3%) reported losing weight to compete. Most lost between 1 and 3 kg in the pre-competition period for three to four days, up to twice a year, by the following methods: increasing physical activity, skipping meals and restriction of fluid intake. Most men lost 1-2 kg and women between 1 and 2.5 kg. Men recovered until 2 kg after weighing, while the women came to recover up to 7 kg. The master was the person who most influenced them.CONCLUSIONS: We observed a high frequency of fast weight reduction in Taekwondo athletes. Professional cited as most influential in weight loss was the Master. The methods used were increased physical activity, decreased intake of food and fluid restriction...