Kinesiology, Vol. 34. No. 1., 2002.
Original scientific paper
Time analysis of the goalkeepers’ movements in water polo
Theodoros Platanou
; Department of Physical Education and Sport Science, University of Athens, Greece
Vassilios Thanopoulos
; Department of Physical Education and Sport Science, University of Athens, Greece
Abstract
The aim of this study is to measure the frequency, the partial duration and the total partial duration of all the recognisable movements of a water polo goalkeeper. In addition, comparisons of the goalkeepers’ mean work and rest time value between the winning and losing teams, as well as the mean values of the work to rest proportions were made. Fifteen top male goalkeepers were videotaped during the official games of the Greek A/1 division in the 1996 championship. The total duration of every movement was transformed into percentages of the Total Real Time (the total time the ball was in the field) and the Grand Total Time (Total Real Time plus time-outs and intermissions) of the game. The mean frequency value for each movement of all goalkeepers was as follows: Slow Swim 46±3, Pass 24±3, Ready to Swim 55±5, Hands Up 11±7, Jumping 35±8 and Fast Swim 7±4. The mean duration value of each movement was: Slow Swim 00:47.29 ±2.61 sec, Pass 00:06.12±0.77 sec, Ready to Swim 00:13.65±1.90 seconds, Hands up 00:01.51±0.39, Jumping 00:00.65±0.08. The mean percentage value of the duration of every movement to the Grand Total Time was: 63.32% for the Slow Swim, 3.78% for the Pass, 19.32% for the Ready to Swim, 0.44% for the Hands Up, 0.59% for Jumping, 0.57% for Fast Swimming and 11.98% for the Time of Rest, whereas the mean percentage value of the duration of every movement to the Total Real Time was: 69.70%, 4.74%, 23.61%, 0.53%, 0.72% and 0.70%, respectively. The comparison of the goalkeepers’ mean work and rest time values, between the winning and losing teams, as well as the mean values of the work to rest proportions did not show any significant differences. These findings demonstrate that the result of the game does not depend on the time of pressing the goalkeeper, but on other factors.
Keywords
water polo; goalkeeper; movement analysis
Hrčak ID:
225367
URI
Publication date:
28.6.2002.
Visits: 1.750 *