Faculty of Sport and Health Sciences, Ryutsu Keizai University, Ryugasaki, Ibaraki, Japan.
Nutr J. 2012 Dec 11;11:103. doi: 10.1186/1475-2891-11-103.
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 μg/min), whereas no such decreases were observed in the chlorella group (121 ± 53 vs. 113 ± 68, 98 ± 69,115 ± 80, and 128 ± 59 μg/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.
绿藻小球藻含有高水平的蛋白质、维生素和矿物质。我们之前报道过，一种源自小球藻的多种成分补充剂能增加人类唾液分泌型免疫球蛋白 A（SIgA）的分泌速率。在这里，我们研究了这种源自小球藻的补充剂是否能减轻剑道训练期间唾液 SIgA 分泌速率降低的情况。
10 名女性剑道运动员参加了为期 6 天的春季和 4 天的夏季大学间训练营。他们被随机分为两组；一组在春季训练营期间服用安慰剂片剂，在夏季训练营期间服用小球藻片剂，另一组在春季训练营期间服用小球藻片剂，在夏季训练营期间服用安慰剂片剂。受试者在训练营前 4 周开始服用这些片剂，直到训练营后的唾液采样。通过 ELISA 测量唾液 SIgA 浓度。
所有受试者都参加了几乎所有的训练项目，且两组在训练营期间的体重变化和主观身体舒适度评分相当。然而，两组之间的唾液 SIgA 分泌速率变化不同。安慰剂组在训练营期间唾液 SIgA 分泌速率下降（训练营前 vs. 第二、中、最后一天和训练营后：146±89 比 87±56、70±45、94±58 和 116±71 μg/min），而小球藻组则没有观察到这种下降（121±53 比 113±68、98±69、115±80 和 128±59 μg/min）。
我们的结果表明，使用源自小球藻的膳食补充剂可减轻竞技运动训练期间唾液 SIgA 分泌的减少。
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