Rosa João Paulo P, Silva Andressa, Rodrigues Dayane F, Simim Mário Antônio, Narciso Fernanda V, Tufik Sergio, Bichara Jorge J, Pereira Sebastian Rafael D, Da Silva Sidney C, de Mello Marco Tulio
a Departamento de Esportes, Escola de Educação Física, Fisioterapia e Terapia Ocupacional , Universidade Federal de Minas Gerais , Belo Horizonte , Brazil.
b Departamento de Psicobiologia , Universidade Federal de São Paulo , São Paulo , Brazil.
Chronobiol Int. 2018 Aug;35(8):1095-1103. doi: 10.1080/07420528.2018.1459660. Epub 2018 Apr 16.
This study investigated the effect of using an artificial bright light on the entrainment of the sleep/wake cycle as well as the reaction times of athletes before the Rio 2016 Olympic Games. A total of 22 athletes from the Brazilian Olympic Swimming Team were evaluated, with the aim of preparing them to compete at a time when they would normally be about to go to bed for the night. During the 8-day acclimatization period, their sleep/wake cycles were assessed by actigraphy, with all the athletes being treated with artificial light therapy for between 30 and 45 min (starting at day 3). In addition, other recommendations to improve sleep hygiene were made to the athletes. In order to assess reaction times, the Psychomotor Vigilance Test was performed before (day 1) and after (day 8) the bright light therapy. As a result of the intervention, the athletes slept later on the third (p = 0.01), seventh (p = 0.01) and eighth (p = 0.01) days after starting bright light therapy. Regarding reaction times, when tested in the morning the athletes showed improved average (p = 0.01) and minimum reaction time (p = 0.03) when comparing day 8 to day 1. When tested in the evening, they showed improved average (p = 0.04), minimum (p = 0.03) and maximum reaction time (p = 0.02) when comparing day 8 to day 1. Light therapy treatment delayed the sleep/wake cycles and improved reaction times of members of the swimming team. The use of bright light therapy was shown to be effective in modulating the sleep/wake cycles of athletes who had to perform in competitions that took place late at night.
本研究调查了在2016年里约奥运会前使用人工强光对运动员睡眠/觉醒周期的调整作用以及反应时间的影响。对巴西奥运游泳队的22名运动员进行了评估，目的是让他们在通常即将上床睡觉的时间准备参赛。在为期8天的适应期内，通过活动记录仪评估他们的睡眠/觉醒周期，所有运动员均接受30至45分钟的人工光疗（从第3天开始）。此外，还向运动员提出了其他改善睡眠卫生的建议。为了评估反应时间，在强光疗法之前（第1天）和之后（第8天）进行了心理运动警觉性测试。干预的结果是，在开始强光疗法后的第三天（p = 0.01）、第七天（p = 0.01）和第八天（p = 0.01），运动员入睡时间延迟。关于反应时间，与第1天相比，在第8天上午测试时，运动员的平均反应时间（p = 0.01）和最短反应时间（p = 0.03）有所改善。在晚上测试时，与第1天相比，他们的平均反应时间（p = 0.04）、最短反应时间（p = 0.03）和最长反应时间（p = 0.02）有所改善。光疗延迟了游泳队队员的睡眠/觉醒周期并改善了反应时间。结果表明，对于那些必须在深夜进行比赛的运动员，使用强光疗法在调节其睡眠/觉醒周期方面是有效的。
