J 2016

Isokinetic strength of the wrist in male aikido athletes

VODIČKA, Tomáš, Willy Augustinus PIETER, Zdenko REGULI and Martin ZVONAŘ

Basic information

Original name

Isokinetic strength of the wrist in male aikido athletes

Authors

VODIČKA, Tomáš (203 Czech Republic, belonging to the institution), Willy Augustinus PIETER (528 Netherlands, belonging to the institution), Zdenko REGULI (703 Slovakia, guarantor, belonging to the institution) and Martin ZVONAŘ (203 Czech Republic, belonging to the institution)

Edition

Ido Movement for Culture, 2016, 2084-3763

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

Sport and leisure time activities

Country of publisher

Poland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/00216224:14510/16:00089635

Organization unit

Faculty of Sports Studies

DOI

UT WoS

000394368800006

Keywords in English

martial arts; hand strength; torque; biomechanics

Tags

Tags

International impact, Reviewed
Změněno: 27/4/2017 12:52, Ing. Jana Smítalová

Abstract

V originále

Physiological research in general on aikido is scarce. Although many aikido techniques use extreme wrist flexion and extension that may lead to injury, no information is available on isokinetic strength of the upper extremities in aikido. The purpose of the current study was to assess isokinetic strength of the wrist in recreational aikido athletes. Material and Methods. Male aikido practitioners (n=13, 33.23±7.94 years, 180.62±8.03 cm, 80.31±13.10 kg) were recruited from a summer camp organized at Masaryk University. Subjects were tested on a Cybex Humac Norm at 120o, 180o and 240o/sec on both left and right wrists. A 3-way (Side x Movement x Angular Velocity) Anova with repeated measures on the second and third factors was used to assess the differences between right and left wrist extension and flexion by angular velocity. The level of significance for all analyses was set to an effect size of 0.20. Results. There was a Movement x Angular velocity interaction (partial eta2 = 0.859, 95% CI: 0.451– 0.954). Simple effects analysis showed that wrist extension at 240o/sec (13.27 ± 3.18 Nm) was lower than wrist flexion (23.55 ± 6.66 Nm) at the same angular velocity (d = 2.050, 95% CI: 0.123 – 3.978) but the effect was not clear. Flexion at 120o/sec (31.64 ± 8.06 Nm) was higher than at 180o/s (28.50 ± 7.10 Nm) but the effect was also not clear: d = 0.430 (95% CI: -2.375 – 3.235). Larger sample size will be needed to arrive at a definitive conclusion. More research is required with aikidokas varying in age and experience. Female practitioners should be investigated as well. Future research should also include the positions at peak torque. Aikidokas have weaker handgrip strength than other combat sports/martial arts athletes. Based on the current results, strength exercises for wrist extension in aikido athletes may be indicated, especially when using weapons, where extension is more important in hand techniques.