Pessoal, a grosso modo, eu entendi direito? O cara que "leva
uns apertoes no pescoço, enxerga melhor?
Influence of choking in Judo on vision in well-trained
Judoka: an explorative field study.
Raschka C, Rau R, Koch HJ.
Institute of Sports Sciences, Johann Wolfgang Goethe
University Frankfurt/Main, Germany.
The present study was designed to investigate the effects of
a cross-choking-technique commonly used in Judo on visual
acuity. In 156 Judokas, experienced in competition, visual
acuity was examined before and after choking (Juji-Jime). The
average age of the 46 female and 110 male subjects was 22.8
years (standard deviation 10.5 years). In all examined grades
of distance (infinite, 0.55 m and 0.4 m), eye tests showed an
improvement of visual acuity after choking on a highly
significant scale. In quantitative terms, vision the far
sight range was optimized more clearly than in the close
ranges. The following mechanisms are discussed as possible
causes of the present results: an increase of blinking
frequency induced by stress, an optimized tear film covering
the cornea, a stenopaeic gap induced by improved blinking,
pupillomotor alterations and an improved cerebral processing
of visual signals and information. From an evolutionary-
biologic perspective, the benefit of this psychophysiological
mechanism might consist in an improvement of visual acuity in
moments of danger, approaching from a distance and, thus,
better chances of survival.
Abraços
Fabricio
____________________________________________
Fabricio Boscolo Del Vecchio
Mestrando em Ciências do Esporte - UNICAMP
http://www.judodaunicamp.hpg.com.br
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