TY  - JOUR
AU  - Elliot, Bruce C.
A2  - Elliot, Bruce C.
A2  - Marshall, Robert N.
A2  - Noffal, Guillermo J.
DB  - BISp
DP  - BISp
KW  - Aufschlag
KW  - Ballgeschwindigkeit
KW  - Biomechanik
KW  - Extremität, obere
KW  - Rotation
KW  - Schlägerhaltung
KW  - Tennis
KW  - Treffmoment
LA  - eng
TI  - Contributions of upper limb segment rotations during the power serve in tennis
TT  - Die Auswirkungen der Rotation der oberen Gliedmaßensegmente waehrend des Poweraufschlages im Tennis
PY  - 1995
N2  - In the high-velocity tennis serve, the contributions that the upper limb segments' anatomical rotations make to racket head speed at impact depend on both their angular velocity and the instantaneous position of the racket with respect to the segments' axes of rotation. Eleven high-performance tennis players were filmed at a nominal rate of 200 Hz by three Photosonics cameras while hitting a high-velocity serve. The three-dimensional (3-D) displacement histories of 11 selected landmarks were then calculated using the direct linear transformation approach, and 3-D individual segment rotations for the upper limb were calculated using vector equations (Sprigings, Marshall, Elliott, & Jennings, 1994). The major contributors to the mean linear velocity of the center of the racket head of 31.0 m/s at impact were internal rotation of the upper arm (54.2%), flexion of the hand (31.0%), horizontal flexion and abduction of the upper arm (12.9%), and racket shoulder linear velocity (9.7%). Forearm extension at the elbow joint played a negative role (-14.4%) and reduced the forward velocity of the center of the racket at impact.           Verf.-Referat
L2  - https://dx.doi.org/10.1123/jab.11.4.433
DO  - 10.1123/jab.11.4.433
SP  - S. 433-442
SN  - 1065-8483
JO  - Journal of applied biomechanics
IS  - 4
VL  - 11
M3  - Gedruckte Ressource
M3  - Elektronische Ressource (Datenträger)
ID  - PU199606108517
ER  -