Analysis of anticipation by 3D motion capturing – a new method presented in karate kumite

Petri, Katharina; Lichtenstein, Marvin; Bandow, Nicole; Campe, Sebastian; Wechselberger, Marcus; Sprenger, Dominik; Kaczmarek, Felix; Emmermacher, Peter; Witte, Kerstin

doi:10.1080/02640414.2016.1158851

Cited by 24 publications

(17 citation statements)

References 20 publications

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“…The Mawashi geri is executed in high speed, being a very precise kick resulting in multiple points during fight 28 . One trait in this technique is the fact that it starts even before the opponent could detect the attack 29 . The Mawashi geri merits higher attention from coaches in their periodization programmes, being an efficient technique used by Karate athletes 19 .…”

Section: Discussionmentioning

confidence: 99%

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Tactical and technical performance analysis of the male 65 kg category at the brazilian shotokan karate championship

et al. 2020

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RESUMOO objetivo do presente estudo foi identificar as técnicas mais utilizadas por medalhistas e atletas derrotados durante o Campeonato Brasileiro de Karatê Shotokan de 2017. Onze lutas envolvendo treze atletas com 28.5 ± 3.7 anos que disputaram a categoria 1º. KYU até 65 kg foram investigados. A análise foi realizada por seis especialistas por meio da observação e registro de técnicas utilizando planilha tática e técnica de Scout de Karatê. O teste Anova foi utilizado para comparar as ações e técnicas mais utilizadas. O teste do qui-quadrado para amostras independentes foi utilizado para verificar a existência de diferenças significativas entre as técnicas utilizadas pelos atletas vencedores e derrotados (p<0.05). Os resultados mostram que o ataque mais frequente durante as lutas foi "Mawashi geri", 26.3 ± 1.5 vezes, seguido de "Gyaku zuki" com 19.5 ± 2.0 vezes (p<0.01). A ação tática mais visualizada durante os combates foi o ataque com 47.5 ± 5.5 vezes (p<0.01). "Mawashi geri" foi o ataque mais usado (p=0.01) pelos vencedores 71.4% quando comparado com os atletas derrotados 28.6%. Em conclusão o ataque "Mawashi geri" foi a decisão mais assertiva usada na categoria até 65 Kg. Palavras-chave: Artes Marciais. Karatê. Análise. ABSTRACTThe aim of the present study was to identify the most used techniques by medalists and defeated athletes during the Brazilian Shotokan Karate Championship of 2017. Eleven fights involving thirteen athletes (28.5±3.7yrs.) who competed in the category "up to 65 Kg 1 st KYU" were investigated. Analysis were conducted by six specialists through the observation and register technique using the tactical and technical spreadsheet Scout Karate. The Anova test was used to compare actions and techniques mostly used. The Chi-square test for independent samples was used to verify the existence of significant differences among the techniques used by the winning and defeated athletes (p<0.05). Results show that the most frequent attack during fights was the "Mawashi geri", 26.3±1.5 times, followed by "Gyaku zuki" with 19.5±2.0 times (p<0.01). The most visualized tactical action during combats was the attack with 47.5±5.5 times (p<0.01). "Mawashi geri" was the mostly used attack (p=0.01) performed by winners (71.4%) when compared with the defeated athletes (28.6%). The results indicate that the "Mawashi geri" attack was the most assertive decision used in the category "up to 65 Kg 1 st KYU".

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Section: Discussionmentioning

confidence: 99%

“…Two tactical behaviours in Kumite Karate, perception and anticipation, have not been thourougly investigated to date. Karate athletes must react to extreme and quick movements in a short period of time in order to neutralize incoming attakcs thus avoiding the opponent win 21 .…”

Section: Introductionmentioning

confidence: 99%

Tactical and technical performance analysis of the male 65 kg category at the brazilian shotokan karate championship

et al. 2020

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“…An equivalent movement used in Muay Thai is called,"switch stance" (Turner, 2009). In sports practice, these "early cues" (Petri et al, 2017) are also known as "Telegraphs" (TGs), describing movements or initiation actions prior to the actual technique start (e.g., leg elevation), which are sufficiently large to be detected and identified by the opponent. Wąsik (2011) reported that a "shifting the back-leg forward" TG starts about 400 ms before the kicking leg elevation, which is about 2/3 of the kicks' total duration (0.62 s).…”

Section: Introductionmentioning

confidence: 99%

Exploration of martial arts kick initiation actions and telegraphs

Hoelbling

Smiech

Cizmic

et al. 2021

International Journal of Performance Analysis in Sport

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A technique in Martial Arts is often indicated by an athlete's preceding actions, which potentially enables an opponent to detect or counter it. Prior to kicks, fighters attain balance and ease leg elevation by re-distributing their weight (WRT) or ease following sequences by elevating COM (CET). The aim of this study was to define such movements and to compare them by their duration and motion amplitude. The kick preceding actions and regular fighting movements of a kicking combination performed by 44 fighters across different skill levels (advanced to world leading) were compared. The initiation action start was determined by the moment during the preparatory phase, when a joint angle significantly exceeds or subceeds a specific threshold (3Sd). Descriptive statistics and qualitative analysis were used to summarise movement types, durations, and amplitudes. T-and Wilcoxon tests were performed to analyse differences in movement start and amplitude between WRT and CET, while Friedman-and Dunn-Bonferroni tests were used between body segments. Results showed that WRTs start earlier, happen more often, and are more subtle than CETs. Furthermore, proximal segments tend to move earlier [Sequence: COM; torso; hips> arms; knees] and with less movement amplitude [Sequence: arms > hips; knees > torso].

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“…Context information can be information about the position of the players in the field, the score, the knowledge about movement preferences (Loffing & Cañal-Bruland, 2017), or the interpersonal distance between athletes (e.g. Petri et al, 2016). Such context information are perceived all the time, while kinematic information become more important around ball contact or ball release (Runswick, Roca, Williams & McRobert, 2018).…”

Section: Introductionmentioning

confidence: 99%

The influence of auditory information on performance in table tennis

Petri¹,

Schmidt²,

Witte³

2020

Eur. J. Hum. Mov.

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It is well-known that visual information is essential for anticipation in table tennis but it not clarified whether auditory cues are also used. Therefore, we performed two in-situ studies, in which novices (study A) and advanced players (study B) responded to strokes of a real opponent or a ball machine by returning with forehand counters (study A) and forehand top spins (study B) to a given target area on the table. We assessed the parameters “hit quality” and “subjective effort”. In study A, we provided four conditions: normal, a noise-cancelling headphone and earplugs to dampen auditory information, other noise-cancelling headphones and earplugs to remove almost all environmental sounds, and the same head-phones with additional bright noise to remove all sounds. In study B, we performed three tests (irregular play and regular play with an opponent and response to regular balls of a ball machine) under two conditions: normal and noise-cancelling headphones with the additional bright noise. In both studies, no significant differences between all conditions for “hit quality” and “subjective effort” (all p>0.05) were found. We conclude that auditory information, as well as their volume, have no influence on the hit quality in table tennis for novices and advanced players.

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Analysis of anticipation by 3D motion capturing – a new method presented in karate kumite

Cited by 24 publications

References 20 publications

Tactical and technical performance analysis of the male 65 kg category at the brazilian shotokan karate championship

Tactical and technical performance analysis of the male 65 kg category at the brazilian shotokan karate championship

Exploration of martial arts kick initiation actions and telegraphs

The influence of auditory information on performance in table tennis

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