التحليل الكينماتيكي للرمية الجانبية في لعبة الركبي الاوربية للاعبي النخب الجامعية

الملخص EN

To characterize rugby union lineout throwing technique, three experienced male rugby players performed throwing trials under varying conditions of distance and trajectory.

Motion analysis permitted the recovery of joint center coordinates at Hz and the construction of a three-dimensional linked segment model for calculation of joint angle and center of mass time histories.

All participants exhibited greater accuracy at shorter throwing distances, although the accuracy decrement was less in players of higher standard.

Participants demonstrated different alterations in technique when performing throws of longer distances, either showing increased magnitudes of upper-body joint angle velocities (less accurate thrower) or lower body joint velocities (more accurate thrower).

The most elite thrower exhibited greater consistency in timing of peak joint angle velocities, with an overall standard deviation of AS compared with TV s for the least accurate thrower.

Data from participants of lesser ability suggest that changes are made to both magnitudes and timing of joint kinematics, which leads to increased variability in performance.

The implications for players and coaches include the need to develop core strength to permit limited changes to the timing and magnitude of upper-body joint actions while allowing sufficient endpoint velocity to be imparted on the ball.