Baptista Eduardo, André Arriel Rhai, de Castro Carvalho Ana Luiza, Bispo Matheus M C, Rodrigues Alex Batista, Souza Hiago, Mota Gustavo R, Marocolo Moacir
Institute of Biological Sciences, Department of Physiology, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil.
Department of Sport Sciences/Institute of Health Sciences, Federal University of Triangulo Mineiro, UBERABA, Brazil.
Sports Med Int Open. 2022 Feb 21;6(1):E1-E8. doi: 10.1055/a-1720-6083. eCollection 2022 Jan.
We analyzed the effects of wearing blue lenses on melatonin level, physical and cognitive performance. Fifteen youth volleyball players (15.0±1.5 yrs) attended the laboratory on 3 occasions (48-h interval): on the 1 visit they were familiarized with the procedures of the study, and on 2 and 3 visits they were submitted to the testing protocol wearing transparent (control) or blue lens glasses in a counterbalanced crossover design. The protocol consisted of 10 min in "total darkness," 30 min of light stimulation (wearing blue or transparent lenses), followed by an attentional test, and an agility T-test (without wearing the glasses). Samples of saliva (to determine melatonin concentration) were obtained pre- and post-exposure (30 min) to artificial light, wearing the lenses. Sleepiness, alertness, attention, mood, and perceived recovery status and performance variables (reaction time and T-test) were assessed after lens exposure. Melatonin levels did not differ within and between groups (blue lenses, pre: 0.79±0.73 and post: 1.19±1.374 pg/dl, p=0.252, effect size (ES)=0.38; control, pre: 0.97±1.00 and post: 0.67±0.71 pg/dl, p=0.305, ES=-0.35). Nonetheless, melatonin differences were significantly correlated with physical sedation for glasses with blue lenses (r=-0.526; p=0.04). No other variables differed (p>0.05) between protocols, including T-test performance (p=0.07; ES=0.41). Blue lenses do not influence melatonin levels, cognitive/physical performance, and mood status in amateur youth volleyball players.
我们分析了佩戴蓝色镜片对褪黑素水平、身体和认知表现的影响。15名青年排球运动员（15.0±1.5岁）分3次（间隔48小时）前往实验室：第1次参观时他们熟悉研究程序，第2次和第3次参观时，他们按照平衡交叉设计佩戴透明（对照）或蓝色镜片眼镜接受测试方案。该方案包括在“完全黑暗”中10分钟、30分钟的光刺激（佩戴蓝色或透明镜片），随后进行注意力测试和敏捷性T测试（不戴眼镜）。在佩戴镜片暴露于人造光之前和之后（30分钟）采集唾液样本（以测定褪黑素浓度）。在镜片暴露后评估嗜睡、警觉性、注意力、情绪、感知恢复状态和表现变量（反应时间和T测试）。组内和组间（蓝色镜片，暴露前：0.79±0.73，暴露后：1.19±1.374 pg/dl，p=0.252，效应量（ES）=0.38；对照组，暴露前：0.97±1.00，暴露后：0.67±0.71 pg/dl，p=0.305，ES=-0.35）褪黑素水平无差异。尽管如此，蓝色镜片眼镜的褪黑素差异与身体镇静显著相关（r=-0.526；p=0.04）。各测试方案之间没有其他变量存在差异（p>0.05），包括T测试表现（p=0.07；ES=0.41）。蓝色镜片不会影响业余青年排球运动员的褪黑素水平、认知/身体表现和情绪状态。
