Department of Health and Physical Education, The Education University of Hong Kong, Hong Kong, China.
School of Physical Education & Sports Science, South China Normal University, Guangzhou, China.
J Sports Sci Med. 2020 Nov 19;19(4):753-760. eCollection 2020 Dec.
During the half time of intermittent team sports, substantial physiological changes relating to acid-base balance and glycemic response affect the second-half performance. Refuel and rehydrate strategy is therefore necessary to be investigated. This field experiment assessed the acute effect of a brief mindfulness-based intervention (MBI) coupled with fluid intake on players' cognitive function in a simulated soccer game. In a single-blinded, randomized, cross-over experiment, 14 male players received three treatments [Control: noncarbohydrate solution + traveling introduction audio; CHO: Carbohydrate (CHO)-electrolyte solution + traveling introduction audio; and CHO-M: CHO-electrolyte solution + MBI] during a simulated half-time break of a soccer game. Participants' mindfulness level, blood glucose and lactate, rating of perceived exertion, and cognitive function performance assessed by the Stroop effect task (ST), Corsi block-tapping test (CBT), and rapid visual information processing task (RVIPT) were immediately measured before, during, and after the trial. Repeated measure ANOVA was used for statistical analysis. The results revealed that: (1) in ST, the CHO_M group performed better than the Control group and marginally better than the CHO group; (2) in CBT, both the Control group and CHO-M group responded faster in the posttest than in the pretest; however, the performance of the CHO group remained the same; (3) the CHO group spent less time on missing numbers in post RVIPT compared with the other two groups. In conclusion, findings of this study provided a preliminary evidence of the positive effect of MBI coupled with CHO intake on athletes' cognitive function, with both positive and negative effect of CHO ingestion.
在间歇性团队运动的中场休息期间，与酸碱平衡和血糖反应相关的大量生理变化会影响下半场的表现。因此，需要研究补充营养和水分的策略。本现场实验评估了在模拟足球比赛中，短暂的正念干预（MBI）与液体摄入相结合对运动员认知功能的急性影响。在一项单盲、随机、交叉实验中，14 名男性运动员在模拟足球比赛的中场休息期间接受了三种处理[对照：非碳水化合物溶液+旅行介绍音频；CHO：碳水化合物（CHO）-电解质溶液+旅行介绍音频；和 CHO-M：CHO-电解质溶液+MBI]。参与者的正念水平、血糖和乳酸、感知用力程度评分以及认知功能表现（通过斯特鲁普效应任务（ST）、科西方块测试（CBT）和快速视觉信息处理任务（RVIPT）评估）在试验前、试验中和试验后立即进行测量。使用重复测量方差分析进行统计分析。结果表明：（1）在 ST 中，CHO-M 组的表现优于对照组，略优于 CHO 组；（2）在 CBT 中，对照组和 CHO-M 组在测试后比测试前反应更快；然而，CHO 组的表现保持不变；（3）CHO 组在 RVIPT 后错过的数字较少。总之，本研究的结果提供了初步证据，证明 MBI 与 CHO 摄入相结合对运动员认知功能有积极影响，同时摄入 CHO 也有积极和消极的影响。
