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Indexed/Abstracted in: BIOSIS Previews, EMBASE, Scopus, Emerging Sources Citation Index
Online ISSN 1827-1812
Allegretti Mercadante L. 1, Shoiti Misuta M. 1, Nicolletti C. G. 1, Monezi L. A. 1, Bonganha V. 2, Daniel J. F. 3, Cavaglieri C. R. 2, Borin J. P. 2, Montagner P. C. 2
1 School of Applied Sciences, FCA/UNICAMP, Limeira, SP, Brazil;
2 School of Physical Education, FEF/UNICAMP, Limeira, SP, Brazil;
3 Pontifical Catholic University of Campinas – PUCCAMP, Limeira, SP, Brazil
AIM: Aim of the study was to describe the distance covered per quarter, during official games, by elite basketball referees, using a computer aided video-based tracking system. The analysis consists of determining the distance covered by the referees, from their positions as a function of time.
METHODS: The distance covered data were obtained with the DVideo System, in which the calibration, temporal synchronization of the cameras, the manual tracking, and the two-dimensional reconstruction of coordinates measured to the court coordinates were performed. The distances covered by referee are presented by game quarter. Also, the time spent within velocity ranges is described.
RESULTS: The referees covered on average 1130.03 m (±160.72 m) per quarter game. Most of the time they remained standing or with small lateral displacements, corresponding to 87.1% of the total game duration. The TWO-WAY ANOVA of the distances covered revealed significant differences between referees and ranges of velocities, suggesting that a pattern does not exist; there is also a need to be prepared for sudden displacements in velocities above 6 m/s, after covering at least 6000 m with different velocities.
CONCLUSION: The methodology was applicable using a video-based tracking system, evaluating the distance covered by referees per quarter game and describing useful information about elite basketball referees in terms of their physical fitness.