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Quem sou eu

São Paulo, São Paulo, Brazil
Professor da EEFE-USP; Praticante e Pesquisador de Judô; Preparador físico de atletas de modalidades esportivas de combate.

Arquivo do blog

sábado, 15 de dezembro de 2012

Suplementação com alga e secreção de IgA em atletas de kendo

 2012 Dec 11;11(1):103. [Epub ahead of print]

Chlorella intake attenuates reduced salivary SIgA secretion in kendo training camp participants.



BACKGROUND: The green alga Chlorella contains high levels of proteins, vitamins, and minerals. We previously reported that a chlorella-derived multicomponent supplement increased the secretion rate of salivary secretory immunoglobulin A (SIgA) in humans. Here, we investigated whether intake of this chlorella-derived supplement attenuated the reduced salivary SIgA secretion rate during a kendo training camp.


Ten female kendo athletes participated in inter-university 6-day spring and 4-day summer camps. They were randomized into two groups; one took placebo tablets during the spring camp and chlorella tablets during the summer camp, while the other took chlorella tablets during the spring camp and placebo tablets during the summer camp. Subjects took these tablets starting 4 weeks before the camp until post-camp saliva sampling. Salivary SIgA concentrations were measured by ELISA.


All subjects participated in nearly all training programs, and body-mass changes and subjective physical well-being scores during the camps were comparable between the groups. However, salivary SIgA secretion rate changes were different between these groups. Salivary SIgA secretion rates decreased during the camp in the placebo group (before vs. second, middle, and final day of camp, and after the camp: 146 +/- 89 vs. 87 +/- 56, 70 +/- 45, 94 +/- 58, and 116 +/- 71 mug/min), whereas no such decreases were observed in the chlorella group (121 +/- 53 vs. 113 +/- 68, 98 +/- 69,115 +/- 80, and 128 +/- 59 mug/min).


Our results suggest that a use of a chlorella-derived dietary supplement attenuates reduced salivary SIgA secretion during a training camp for a competitive sport.

Perfil físico e fisiológico de atletas de luta olímpica chinesas

 2012 Dec 12. [Epub ahead of print]



1Biology Center, China Institute of Sport Science, Beijing, China 2Elite Sports College, Wuhan Sports University, Wuhan, China 3Elite Sports College, Beijing Sports University, Beijing, China 4The Combat and Weightlifting Administration Center of Shandong province, Jinan, China 5The Combat and Weightlifting Administration Center of Anhui province, Hefei, China 6Department of Biomedicine, Universidad Europea de Madrid, Spain 7Health, Exercise Science and Sport Management, University of Wisconsin-Parkside, Kenosha, WI., U.S.A.


ABSTRACT: The purpose of this investigation was to describe the physiological profile of elite senior Chinese female wrestlers. Twenty-five elite wrestlers, nationally ranked in the top-3 of their weight class, participated in the study. The subjects included Olympic and world champion medalists. The physiological profile included testing of running maximal oxygen consumption (VO2max), 3,200 m run time, 400 m run time, 30 s Wingate anaerobic power and capacity, shoulder, elbow, knee and trunk isokinetic torque, and one repetition maximums (1 RM) in specified exercises. The major results (mean ± SD) were VO2max: 50.58 ± 3.33 ml kg min; 3,200 m run: 14.1 min ± 0.49 s; 400m run: 1min 11 s ± 4 s; Wingate maximal anaerobic power: 495.21 ± 79.13 W and mean power: 262.97 ± 52.39 W; 1 RM dead lift: 124 ± 19 kg; 1 RM deep squat: 98 ± 11 kg; 1 RM prone rowing: 72 ± 8 kg; 1 RM power clean: 76 ± 12 kg; and 1 RM hold and squat: 109 ± 17 kg. In absolute terms in the majority of measures the heavier weight classes had greater values than the lighter weight classes, but relative to body mass there were few differences in measures between weight classes. In most measures the best value was that of an Olympic and/or world championship medalist. The results indicate female wrestling success is not dependent upon one physiological characteristic, but that a variety of physiological profiles can result in success. This data on elite female wrestlers can be compared to other wrestlers to help determine individual weaknesses or strengths, and to design training programs that result inwrestling success.