TY  - JOUR
AU  - Kawamoto, Yuta
A2  - Kawamoto, Yuta
A2  - Iino, Yoichi
A2  - Yoshioka, Shinsuke
A2  - Fukashiro, Senshi
DB  - BISp
DP  - BISp
KW  - Analyse, biomechanische
KW  - Armbewegung
KW  - Beschleunigung
KW  - Biomechanik
KW  - Drehmoment
KW  - Energie, mechanische
KW  - Energieübertragung
KW  - Flexion
KW  - Fußstellung
KW  - Gewichtsverlagerung
KW  - Kinematik
KW  - Kinetik
KW  - Kompensation
KW  - Oberkörper
KW  - Rotation
KW  - Schlagbewegung
KW  - Schläger
KW  - Schultergelenk
KW  - Standtechnik
KW  - Technik, sportliche
KW  - Tennis
KW  - Translation
KW  - Untersuchung, vergleichende
KW  - Vorhandschlag
KW  - Winkelgeschwindigkeit
LA  - eng
TI  - Directionally compensated mechanical work provided by the shoulder leads to similar racket velocities during open and square stance forehand groundstrokes in tennis
TT  - Die richtungskompensierte mechanische Arbeit der Schulter führt während Tennis-Vorhandgrundschlägen in offener und seitlicher Schlagstellung zu ähnlichen Schlägergeschwindigkeiten
PY  - 2019
N2  - The differences between the racket-arm acceleration mechanisms during open and square stance forehand groundstrokes in tennis were examined by quantifying the mechanical work done on the racket arm. We studied 13 advanced tennis players as they performed these strokes at maximum effort and calculated the work using inverse dynamics. The racket head speed was similar between the open and square stances. In the open stance, the lack of weight shifting towards the hitting direction resulted in a lower velocity for the shoulder joint centre in the hitting direction than in the square stance, and less work was done by the shoulder joint force in the hitting direction in the open stance than in the square stance (0.30 ± 0.11 J·kg-1 vs. 0.38 ± 0.16 J·kg-1; p = 0.005). However, in the open stance, the torso rotated more towards the hitting direction and had more upward acceleration, which resulted in more work done by the sideways and upward shoulder joint forces than in the square stance (sideways: 0.07 ± 0.09 J·kg-1 vs. 0.05 ± 0.09 J·kg-1, p = 0.046; upward: 0.08 ± 0.09 J·kg-1 vs. 0.04 ± 0.07 J·kg-1, p = 0.002). Thus, the greater work done by the sideways and upward shoulder joint forces compensated for the lesser work done by the shoulder joint force in the hitting direction in the open stance. In both stances, mainly the horizontal flexion torque and internal rotation torque at the shoulder increased the energy of the racket arm.
L2  - https://dx.doi.org/10.1080/17461391.2018.1552720
DO  - 10.1080/17461391.2018.1552720
SP  - S. 902-912
SN  - 1746-1391
JO  - European journal of sport science
IS  - 7
VL  - 19
M3  - Elektronische Ressource (online)
M3  - Gedruckte Ressource
ID  - PU202002001147
ER  -