Youngstedt Shawn D, Kripke Daniel F
Department of Exercise Science, Norman J, Arnold School of Public Health University of South Carolina, Columbia, SC 29208 USA.
BMC Psychiatry. 2007 Oct 30;7:62. doi: 10.1186/1471-244X-7-62.
The aim of this open trial was to examine the influence of acute bright light exposure on anxiety in older and young adults.
This study was ancillary to a complex 5-day laboratory experiment testing phase-responses to light at all times of the day. On 3 consecutive days, participants were exposed to bright light (3,000 lux) for 3 hours. The Spielberger State-Trait Anxiety Inventory (Form Y1) was administered 5 minutes before and 20 minutes after each treatment. Mean state anxiety before and after treatment were analyzed by age, sex, and time ANOVA. To avoid floor effects, only participants with baseline STAI levels of > or = 25 were included.
A significant anxiolytic effect of bright light was found for the mean data, as well as for each of the three days. No significant main effect of age, sex, or interaction of these factors with STAI change were found.
The results show consistent and significant (albeit modest) anxiolytic effects following acute bright light exposure in low anxiety adults. Further randomized, controlled trials in clinically anxious individuals are needed.
这项开放性试验的目的是研究急性强光照射对老年人和年轻人焦虑情绪的影响。
本研究是一项复杂的为期5天的实验室实验的辅助研究，该实验测试了一天中不同时间对光的相位反应。连续3天，参与者接受3小时的强光照射（3000勒克斯）。在每次治疗前5分钟和治疗后20分钟使用斯皮尔伯格状态-特质焦虑量表（Y1版）。通过年龄、性别和时间方差分析对治疗前后的平均状态焦虑进行分析。为避免出现地板效应，仅纳入基线状态焦虑量表水平≥25的参与者。
强光对平均数据以及三天中的每一天都有显著的抗焦虑作用。未发现年龄、性别或这些因素与状态焦虑量表变化之间的显著交互作用。
结果表明，在低焦虑成年人中，急性强光照射后会产生一致且显著（尽管程度适中）的抗焦虑作用。需要对临床焦虑个体进行进一步的随机对照试验。
