Postural control in football players with vision impairment: Effect of sports adaptation or visual input restriction?

Abstract Aim: To assess the postural control performance of football 5-a-side (FFS) players, comparing them with sighted players. Methods: Eight FFS players and 7 sighted futsal players were included. Postural control tests included feet together stance (FTS) and single-leg stance (SLS) tasks, performed on rigid and foam surfaces. Sighted players performed the tests with open (EO) and closed (EC) eyes. Area of displacement (Area) and average velocity (Vavg) were calculated from the center of pressure time-series coordinates. Results: On both surfaces conditions, a significant difference between visually impaired football 5-a-side players and sighted EO players was observed during FTS (higher Vavg for visually impaired football 5-a-side players; p < 0.04) and SLS (higher Area and Vavg for visually impaired football 5-a-side players; p < 0.01). No differences between visually impaired football 5-a-side players and sighted EC players were found. Differences between sighted EO vs. sighted EC were observed during FTS on the foam surface, and in SLS on both surface conditions (p < 0.03). Conclusion: FFS players' postural control performance is similar to sighted players with EC but worse than sighted players with EO, suggesting their postural control performance can be simply explained in terms of visual restriction.

Efeito agudo de diferentes períodos de foam rolling sobre o salto vertical contramovimento / Influence of the physical activity level on the quality of life and humor states of university professors

Vários métodos de aquecimento têm sido empregados no campo do treinamento esportivo . O foam rolling (FR) é uma das técnicas mais populares. No entanto, permanece o esclarecimento so bre o s períodos ótimos de FR para melhorar ou manter o desempenho. Portanto, o objetivo do presente estudo foi explorar o efeito agudo de diferentes períodos do FR no desempenho do salto vertical contramov iment o (SV). Doze indivíduos recreacionalmente ativos (23,92 ± 4,08 anos, 7 0 ± 1 2 k g, 1 71 ± 8 cm ) fo ram voluntários para o estudo. Todos os participantes completaram todos os protocolos ex perim en tais co m entrada randomizada. Os participantes realizaram seis visitas separadas por 48 horas. A primeira sessão incluiu a coleta de dados antropométricos, familiarização com o FR e a técnica do SV. Em seguida, cin co protocolos experimentais foram executados em ordem aleatória: Protocolo controle (PC) - salto v ertical sem FR; P30 ­ uma série de 30 segundos de FR antes do salto vertical; P60 - duas séries de 30 segun do s de FR; P90: três séries de 30 segundos de FR; P120 ­ quatro séries de 30 segundos de FR. O FR foi implementado para quadríceps, isquiotibiais, glúteo e gastrocnêmio. Diferenças significativas no desempenho do salto vertical (p <0,012) foram observadas no P30 (47,4 ± 11,7 cm), P60 (48,9 ± 11,9 cm), P90 (48,5 ± 12,1cm), P120 (48,6 ± 11,3 cm) em relação à PC (46,8 ± 11,3 cm). Além disso , P 60, P9 0, P120 apresentaram maior desempenho de salto vertical em relação ao p rotocolo P3 0. Po rtanto , o s praticantes e treinadores devem considerar a utilização de 60-120 segundos de FR durante o aquecimento, com o objetivo de melhorar o desempenho do SV...(AU)

Several warm-up methods have been employed in the field of athletic training. Th e foam rolling (FR) is one of the most popular techniques; however, there is still a lack o f ev idence abo ut t he optimal FR periods to enhance strength performance. Therefore, the purpose of the present study was t o explore the acute effect of different periods of the FR on vertical countermovement jump. Twelve recreationally active individuals (23.92 ± 4.08 years, 70 ± 12 kg, 171 ± 8cm) volunteered for t he st udy . Treatment conditions were participants using a random assignment. Participan ts p erform ed six v isit s separated by 48 hours. The first session included the collection of anthropometric data and familiarizatio n with a foam roller and the vertical countermovement jump technique. Then, five experimental p rotocols were employed in a randomized order: control protocol (CP) - the vertical countermovement without FR; P30 - one set of 30 seconds of FR before the vertical jump; P60 - two sets of 30 seconds of FR; P90: three sets of 30 seconds of FR; P120 - four sets of 30 seconds of FR. The FR was implemented for quadriceps, hamstrings, gluteus, and gastrocnemius. Significant differences in vertical countermovement jump performance (p < 0.012) were observed under the P30 (47.4 ± 11.7 cm), P60 (48.9 ± 11.9 cm), P90 (48.5 ± 12.1), P120 (48.6 ± 11.3 cm) compared to CP (46.8 ± 11.3 cm). In addit io n, P60 , P 90 , P 12 0 sh o wed greater vertical jump performance compared to the P30 protocol. Therefore, t he p ractition ers sh o uld consider utilizing 60-120 seconds of FR during the warm-up with the goal of acutely improving the vertical countermovement jump performance...(AU)