TY  - JOUR
AU  - Rinaldi, Martina
A2  - Rinaldi, Martina
A2  - Nasr, Yasmen
A2  - Atef, Ghada
A2  - Bini, Fabiano
A2  - Varrecchia, Tiwana
A2  - Conte, Carmela
A2  - Chini, Giorgia
A2  - Ranavolo, Alberto
A2  - Draicchio, Francesco
A2  - Pierelli, Francesco
A2  - Amin, Mokhtar
A2  - Marinozzi, Franco
A2  - Serrao, Mariano
DB  - BISp
DP  - BISp
KW  - Analyse, biomechanische
KW  - Bewegungsablauf
KW  - Bewegungsanalyse
KW  - Biomechanik
KW  - Elektromyographie
KW  - Gelenkbewegung
KW  - Kampfsport
KW  - Karate
KW  - Kinematik
KW  - Kinetik
KW  - Schlagbewegung
KW  - Technikanalyse
KW  - Untersuchung, empirische
LA  - eng
TI  - Biomechanical characterization of the Junzuki karate punch : indexes of performance
TT  - Biomechanische Charakterisierung des Karateschlags Junzuki : Leistungskennzahlen
PY  - 2018
N2  - The aims of this study were: (i) to determine kinematic, kinetic, and electromyographic characteristics of Junzuki karate punch in professional karate athletes; (ii) to identify biomechanical parameters that correlate with punch force and lead to a higher punching performance; (iii) to verify the presence of muscle co-activation in the upper limb, trunk, and lower limb muscles. Data were collected from nine experienced karatekas from the Accademia Italiana Karate e Arti Marziali during the execution of the specific punch. Mean punch forces (181.2 N) delivered to the target, the range of motion of both right and left knees (1.13 and 0.82 rad) and right elbow (1.49 rad) joints, and the angles at impact (knee: 0.81 and 0.91 rad; elbow: 1.19 rad) in the sagittal plane were computed. Furthermore, the trunk rotational angular acceleration (63.1 rad s−2), force related to the lower limbs (550.2 and 425.1 N), and co-activation index for the upper limb (36.1% and 34.7%), trunk (24.5% and 16%), and lower limbs (16.0% and 16.1%) muscles were evaluated bilaterally. Significant positive correlations were found between the punch force and both right and left knee flexion at the instant of impact and right and left leg force. Significant negative correlation was found between the punch force and maximum trunk angular acceleration. Significant differences (p = .03) in the co-activation index among the upper limb, trunk, and lower limbs muscles highlighted a rostro-caudal gradient on both body sides. This research could be of use to performers and coaches when considering training preparations.
L2  - https://dx.doi.org/10.1080/17461391.2018.1455899
DO  - 10.1080/17461391.2018.1455899
SP  - S. 796-805
SN  - 1746-1391
JO  - European journal of sport science
IS  - 6
VL  - 18
M3  - Elektronische Ressource (online)
M3  - Gedruckte Ressource
ID  - PU201811008601
ER  -