Abstract
Objetivo Verificar a variacao da PIO no exercicio resistido na posicao sentada e em decubito dorsal. Metodos Foram avaliados 14 voluntarios do Centro de Atividades Fisicas do Banco de Olhos de Sorocaba (BOS Fit). Os criterios de exclusao adotados foram: I) opacidade de meios; II) alteracao de volume do bulbo ocular ou ausencia de bulbo ocular; III) PIO maior do que 21mmHg; IV) idade inferior 20 e superior a 40 anos; V) tempo de pratica de treinamento resistido inferior a 30 dias. Inicialmente foi realizado o teste de predicao no exercicio leg press para determinar o percentual de carga para o respectivo exercicio durante o experimento. Os voluntarios foram submetidos a duas intervencoes separadas em um intervalo de 72 horas, ambas com o mesmo volume e intensidade no exercicio leg press, ou seja, 3 series de 15 repeticoes com 60% 1RM, tempo de intervalo entre as series de 60 segundos e velocidade moderada, de acordo com as seguintes posicoes: P1) leg-press executado na posicao sentada e P2) leg press na posicao em decubito dorsal. A PIO foi obtida utilizando o tonometro de Perkins em tres momentos: M1) imediatamente antes do exercicio; M2) imediatamente apos a terceira serie; M3) tres minutos apos a finalizacao da terceira serie. Resultados Em ambas as posicoes houve queda significativa da PIO apos o exercicio (M2), permanecendo significativamente reduzida apos tres minutos de recuperacao (M3). Contudo, nao houve diferenca da PIO segundo a posicao (P1 e P2), independentemente do momento de afericao (M1, M2 e M3). Conclusao Houve queda da PIO decorrente ao exercicio resistido e nao foi verificada resposta diferencial da PIO de acordo com a posicao do exercicio.
Highlights
The intraocular pressure (IOP) is determined by the production, circulation and drainage of aqueous humor through trabecular and uveoscleral outflow, and by the episcleral venous pressure[1]
Said variation is related to the activity of the autonomic nervous system, humoral control and change muscle tone . [3,4,6,7] it was found that regardless the body position there is a significant increase in the IOP at night that is kept until the early morning hours, but the daily curve of IOP shows differences according to age[8]
A survey was conducted with 82 patients not subject to physical exercise which presented the following conditions: primary open angle glaucoma (POAG), normal pressure glaucoma (NPG) and individuals with normal eyes (NE)
Summary
The intraocular pressure (IOP) is determined by the production, circulation and drainage of aqueous humor through trabecular and uveoscleral outflow, and by the episcleral venous pressure[1]. As for the body position, the IOP lying down is higher than sitting, and possibly the hydrostatic changes such as the elevated episcleral venous pressure which occur from one position to another may explain said differences[9]. Regarding physical exercises, both aerobic and anaerobic activities - including weightlifting (resistance training) - show a reduction in the IOP due to the reduction of plasma osmolality, hyperventilation, increased nitric oxide synthesis, reduction in plasma pH, among other mechanisms[10,11]. In this sense the objective of the present study was to verify the IOP variation in the resistance training in the sitting position and in the supine position
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