Kim Choun-Sub, Kim Maengkyu, Kim Min-Ju, Jung Hyeyoung
Sports Medicine Lab, Department of Physical Education, Kyungpook National University, Daegu 41566, Korea.
Bio-Food Research Center, Hurom Co., Ltd., Gimhae 50969, Korea.
Nutr Res Pract. 2020 Dec;14(6):606-620. doi: 10.4162/nrp.2020.14.6.606. Epub 2020 Aug 5.
BACKGROUND/OBJECTIVES: Although some juices affect subjective sleep quality, there is a lack of information on the effect of a specific juice on objective sleep quality and heart rate variability (HRV) during sleep; thus the present study investigated whether a blended juice made from natural extracts influenced sleep quality and HRV during sleep in adults with disturbed sleep.
SUBJECTS/METHODS: A randomized, crossover study was conducted on twenty-five adults (15/10, female/male) complaining of difficulty initiating or maintaining nighttime sleep (Pittsburgh sleep quality index [PSQI] ≥ 5). During feeding sessions (FS), subjects received sleep-inducing juice made of natural ingredients (250 mL/trial) twice a day for 8 weeks or non-FS (N-FS) for 8 weeks while maintaining normal activities. Sleep quality and parameters were recorded via wearable actigraph for 7 consecutive days, and PSQI scores were assessed before and after the intervention. HRV was also monitored at rest and during sleep.
After receiving the sleep-inducing juice intervention (FS), PSQI scores were significantly decreased ( < 0.001) and correlated with a significant decline in fatigue severity scale and visual analogue scale levels ( < 0.05; both). HRV indices of vagal activity were significantly improved during FS ( < 0.05), and no significant differences in N-FS were observed. Sleep efficiency and total sleep time increased significantly ( < 0.05) and sleep latency, total counts, sleep fragmentation index, and movement index, decreased significantly ( < 0.05, all 4) during FS, with no significant differences-observed during N-FS.
This study results demonstrated that an 8-week course of sleep-inducing juice has led to improve sleep quality, suggesting an enhanced cardiac vagal tone during sleep. Thus, it could be a well-tolerated option for adults with disturbed sleep.
背景/目的：尽管一些果汁会影响主观睡眠质量，但缺乏关于特定果汁对睡眠期间客观睡眠质量和心率变异性（HRV）影响的信息；因此，本研究调查了一种由天然提取物制成的混合果汁是否会影响睡眠障碍成年人的睡眠质量和睡眠期间的HRV。
受试者/方法：对25名抱怨夜间入睡困难或难以维持睡眠（匹兹堡睡眠质量指数[PSQI]≥5）的成年人（15名女性/10名男性）进行了一项随机交叉研究。在喂食期（FS），受试者每天两次接受由天然成分制成的助眠果汁（每次250毫升），持续8周，或接受8周的非喂食期（N-FS），同时保持正常活动。通过可穿戴式活动记录仪连续7天记录睡眠质量和参数，并在干预前后评估PSQI评分。还在静息和睡眠期间监测HRV。
接受助眠果汁干预（FS）后，PSQI评分显著降低（<0.001），并与疲劳严重程度量表和视觉模拟量表水平的显著下降相关（均<0.05）。FS期间迷走神经活动的HRV指标显著改善（<0.05），N-FS期间未观察到显著差异。FS期间睡眠效率和总睡眠时间显著增加（<0.05），睡眠潜伏期、总计数、睡眠碎片化指数和运动指数显著降低（均<0.05），N-FS期间未观察到显著差异。
本研究结果表明，8周的助眠果汁疗程可改善睡眠质量，表明睡眠期间心脏迷走神经张力增强。因此，对于睡眠障碍的成年人来说，这可能是一个耐受性良好的选择。
