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Study on the movements of the football players and a ball using the three-dimension analysis
Akira Kan,Mitsuhisa Shiokawa,Ken Okihara,Tatsuya Deguchi,Chul Soon Choi,Seung Wook Choi,Kazufumi Takahashi,Sachio Usui 한국체육과학회 2002 한국체육과학회지 Vol.11 No.1
Required physical abilities or factors for players are researched using indirect data, Physiology of Exercise. The purpose of this paper is measuring players running distance and various types of speed as direct data. Setting two video cameras (SONY DCR-VX1000), each one covering an entire pitch, recorded one of the J-LEAGUE MATCHES. It captured every 1/3sec frame from the recorded tape, and coordinated positions of all players' movements and ball using application software (MPJapan TOMOKO-VM). The coordinated positions data are treated with original application software. After analyzing the data, we found the following; 1) Average distance of each player moved on the match was about 13 to 14 ㎞. GK's distance was about 60% of field players. 2) Increasing players running speed, the number of one's propotion was decreased. 3) Each team showed similar total distances with the 1st and 2nd half, and the 2nd half distance indicated much longer than the 1st half. In comparison each plaver's 1st half distance and 2nd half, it was not unified.
木庭康樹(Koki Kiniwa),大江淳悟(Jungo Ohe),房野?也(Shinya Bono),丸山啓史(Keishi Maruyama),磨井祥夫(Sachio Usui),沖原謙(Ken Okihara),伊藤?馬(Kzuma Ito),菅輝(Akira Kan),?川?久(Mitsuhisa Shiokawa) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.1
The purpose of this study is to show objective data about the amount of the activity of the referee in an actual game, and to use these for the referee training in the future. As a result of consideration, the main referee became clear that an equal ability of moved distance, the movement speed, and the turn frequency, etc. with the field player was demanded. The main referee showed total moved distance twice the sub?referee, and this moved distance was almost equal to the field player. Moreover, it has been understood that a considerably high ability is demanded from the main referee about brilliant because the frequency about four times the sub?referee of the turn is done. Therefore, the main referee is doing advanced work of giving a decision while equal stamina's with the field player being demanded and repeating the turn and the movement according to a diagonal method. On the other hand, the moved distance of the sub?referee was main referee and field player's halves. Moreover, it is thought that the sub?referee is giving the judgment (offside and ball out) in the stopped state at the moment from low?speed movement frequency high. The future tasks are to analyze the accuracy of the work of the sub?referee by comparing sub?referee's position with the position of an offside line, and to consider the sub ?referee qualitatively.