益生菌补充剂对非精英运动员运动耐力的影响:随机,安慰剂控制,双盲,临床试验
Caitlin E McDermott1, Taylor C Judkins1, Heather K Vincent2
1Food Science and Human Nutrition Department, University of Florida, 572 Newell Drive, Gainesville, FL 32611, USA.
概括
益生菌补充剂没有改善跑步者的耐力. 相反,安慰剂组显示增加了疲劳的时间,而益生菌组减少了训练量和强度,这表明这种益生菌对耐力运动员没有性能益处.
科学领域:
- 运动生理学 运动生理学
- 运动营养 运动营养
- 微生物组研究 微生物组研究
背景情况:
- 益生菌补充正在探索运动员的潜在益处,包括减少疾病和改善训练.
- 乳酸菌 helveticus Lafti L10是一种特定的益生菌菌株,研究其对健康和表现的影响.
- 非精英的成年跑步者代表了一个优化训练和减少健康问题的群体,可以影响表现.
研究的目的:
- 为了确定益生菌补充剂是否会增加健康成年非精英跑步者在次最大跑步机跑步中的耗尽时间.
- 调查益生菌可以减少胃肠道和感冒/流感症状的假设,从而有助于训练进展.
- 为了比较 Lactobacillus helveticus Lafti L10 与安慰剂对耐力表现和症状报告的影响.
主要方法:
- 一个随机,安慰剂控制,双盲,并行试验进行了6周.
- 具有一致的跑步习惯和VO2最大值在60-85百分位的参与者 (n=28) 接受了次最大耐力测试.
- 补充包括5x10^9CFU/天的Lactobacillus helveticus Lafti L10或安慰剂;结果包括耗尽时间和自我报告的症状.
主要成果:
- 与安慰剂组相比,益生菌组的消耗时间明显较短 (P=0.01).
- 在安慰剂组 (1344±188秒到1565±219秒) 中,消耗时间增加,但在益生菌组 (1655±230秒到1547±215秒) 中没有变化.
- 益生菌组在干预期间完成了较少的训练,并且训练的强度低于安慰剂组.
结论:
- 乳酸菌 helveticus Lafti L10 补充剂没有提高非精英跑步者的耗尽时间.
- 在安慰剂组观察到的耐力增加可能归因于改变的训练习惯,而不是益生菌效应.
- 在益生菌和安慰剂组之间没有报告胃肠道或感冒/流感症状的显著差异.
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