Department of Kinesiology, Angelo State University, San Angelo, TX, 76909, USA.
J Int Soc Sports Nutr. 2011 Oct 21;8:16. doi: 10.1186/1550-2783-8-16.
Phosphatidylserine (PS) is a phospholipid found in cell membranes of most animals and plants. PS has been shown to reduce stress and increase performance in runners, cyclists and golfers. The purpose of this study was to investigate the effects of a PS containing formulation on cognitive function, mood and endocrine response before and after intense resistance exercise.
18 lower body, resistance trained, college aged males ingested 14 days of supplement (IQPLUS Focus, providing 400 mg of soy-derived PS) and a Placebo (PL), in a randomized, double-blind, placebo controlled, cross-over manner. Following 14 days of supplementation, participants performed an acute bout of lower body resistance training. Mood (Profile of Mood States, POMS) and cognitive function (Serial Subtraction Test, SST) were measured prior to, 5 minutes after, and 60 minutes after exercise. Venous blood samples were collected prior to, and 5, 15, 25, 40 and 60 minutes after exercise. Blood samples were analyzed for plasma cortisol and testosterone. Data were analyzed using repeated measures ANOVA.
PS supplementation significantly reduced the time needed for a correct calculation on the SST by 20% (reduced by 1.27 s per calculation; PL: 6.4 s, PS: 5.13 s; p = 0.001), and reduced the total amount of errors by 39% (PL: 1.28 + .69, PS: .78 + .27, p = 0.53), and increased the amount of correct calculations by 13% (PL: 22.1 + 2.24, PS: 24.9 + 1.52, p = 0.07) prior to or in response to exercise compared to PL. Following exercise, there was no difference in SST scores between PS and PL. There were no significant changes in regards to mood or endocrine response to exercise as a result of PS supplementation.
PS supplementation significantly increased cognitive function prior to exercise. Improved cognitive function could benefit athletes and non-athletes alike. PS did not appear to affect mood or endocrine response prior to or following resistance exercise.
磷脂酰丝氨酸（PS）是一种存在于大多数动植物细胞膜中的磷脂。PS 已被证明可以减轻跑步者、自行车手和高尔夫球手的压力，提高他们的表现。本研究的目的是调查一种含有 PS 的配方对剧烈抗阻运动前后认知功能、情绪和内分泌反应的影响。
18 名下半身、抗阻训练的大学生男性以随机、双盲、安慰剂对照、交叉方式摄入 14 天的补充剂（IQPLUS Focus，提供 400 毫克的大豆衍生 PS）和安慰剂（PL）。在补充 14 天后，参与者进行了一次急性下肢抗阻训练。在运动前、运动后 5 分钟和 60 分钟测量情绪（心境状态问卷，POMS）和认知功能（连续减法测试，SST）。在运动前、运动后 5、15、25、40 和 60 分钟采集静脉血样。分析血样中的血浆皮质醇和睾酮。数据采用重复测量方差分析进行分析。
PS 补充剂使 SST 的正确计算时间缩短了 20%（每次计算减少 1.27 秒；PL：6.4 秒，PS：5.13 秒；p = 0.001），总错误数减少了 39%（PL：1.28 +.69，PS：.78 +.27，p = 0.53），运动前或运动中正确计算数增加了 13%（PL：22.1 + 2.24，PS：24.9 + 1.52，p = 0.07），与 PL 相比。运动后，PS 和 PL 之间 SST 评分没有差异。PS 补充剂对运动前后的情绪或内分泌反应没有显著影响。
PS 补充剂在运动前显著提高了认知功能。改善认知功能可能使运动员和非运动员受益。PS 似乎不会影响剧烈抗阻运动前后的情绪或内分泌反应。
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