Abstract des Autors

Ten water polo players were monitored during the performance of the overhand throw from 4 m and 8 m distance to a force platform target using surface EMG of arm, trunk and lower limb muscles. The linear envelope was used for pattern and throwing synchronisation detection, the IEMG was used as a reference value for muscular intensity and the force plate target gave an approximation of throwing precision. Good throwing synchronisation was initiated by the co-contraction of the m. biceps femoris and the m. rectus femoris followed by an important activity of the m. pectoralis major. The actual swing showed an important co-contraction of the m. triceps brachii with the biceps brachii. The impact forces ranged from 598 N to 981 N (4 m) and from 402 N to 961 N (8 m). The impact force profile of the subjects was not reflected in the precision scores, but could be the major cause of wrist, elbow and shoulder problems in waterpolo gool keepers. Verf.-Referat