A force-velocity relationship and coordination patterns in overarm throwing

(Eine Kraft-Geschwindigkeits-Beziehung und koordinative Muster beim Oberarmwurf)

A force-velocity relationship in overarm throwing was determined using ball weights varying from 0.2 to 0.8 kg. Seven experienced handball players were filmed at 240 frames per second. Velocity of joints of the upper extremity and ball together with the force on the ball were derived from the data. A statistically significant negative relationship between force and maximal ball velocity, as well as between ball weight and maximal ball velocity was observed. Also, with increase of ball weight the total throwing movement time increased. No significant change in relative timing of the different joints was demonstrated, suggesting that the subjects did not change their "global "coordination pattern (kinematics) within the tested range of ball weights. A simple model revealed that 67% of ball velocity at ball release was explained by the summation of effects from the velocity of elbow extension and internal rotation of the shoulder. With regard to the upper extremity the internal rotation of the shoulder and elbow extension are two important contributors to the total ball velocity at release.
© Copyright 2004 Journal of Sports Science & Medicine. Department of Sports Medicine - Medical Faculty of Uludag University. Alle Rechte vorbehalten.

Schlagworte: Wurf Handball Spielsportart Kraft Geschwindigkeit Arm Bewegungsschnelligkeit Sportgerät
Notationen: Spielsportarten
Veröffentlicht in: Journal of Sports Science & Medicine
Veröffentlicht: 2004
Heft: 3
Seiten: 211-219
Dokumentenarten: Artikel
Sprache: Englisch
Level: hoch