瑜伽和安静休息对主观焦虑水平和生理相关性的影响：一项 2 向交叉随机试验。
The effects of yoga and quiet rest on subjective levels of anxiety and physiological correlates: a 2-way crossover randomized trial.
机构信息
Department of Nutritional Sciences, Texas Tech University, Lubbock, TX, USA.
Department of Kinesiology and Sport Management, Texas Tech University, 3204 Main Street, Box 43011, Lubbock, TX, 79407-3011, USA.
出版信息
BMC Complement Altern Med. 2018 Oct 17;18(1):280. doi: 10.1186/s12906-018-2343-1.
BACKGROUND
Rest or acute exercise can decrease state anxiety, with some evidence showing exercise to prevent laboratory-induced elevations in anxiety. No study has examined whether yoga provides short-term protection against laboratory-induced anxiety. The aim of this study was to examine the effectiveness of an acute YogaFit session on state anxiety and measures of heart rate variability (HRV) to determine whether yoga provides short-term protection against emotional picture stimuli.
METHODS
A randomized repeated-measures crossover clinical trial was performed. Forty healthy, female college students completed a 30 min session of YogaFit and a time-matched seated rest condition on separate days. After each condition, participants viewed 30 min of emotional picture stimuli. State anxiety, heart rate and time-domain and frequency-domain measures of HRV were assessed baseline, post- condition, and post-exposure to emotional stimuli. Data were analysed using a condition x time (2 × 3) repeated-measures ANOVA.
RESULTS
Post-hoc comparisons indicate the following: (1) state anxiety significantly decreased from baseline to post-condition for both yoga and rest (p = 0.001) but returned to baseline values following exposure to emotional stimuli (p < 0.001) for both conditions; (2) heart rate decreased post-condition to post-exposure (p = 0.020) and baseline to post-exposure (p = 0.033) for both conditions; (3) time-domain measure of HRV showed a significant increase in HRV between baseline and post-condition (p = 0 .019), post-condition and post-exposure (p = 0 .007), and between baseline and post-exposure (p < 0.001).
CONCLUSIONS
Both YogaFit and seated rest were effective at acutely reducing state anxiety post-condition, but not at preventing an induced anxiety response post-exposure. Following exposure to the emotionally stimulating pictures, there was a shift from the high frequency-domain to the low frequency-domain and an increase in the time-domain measure of HRV for both the YogaFit and the quiet rest condition.
TRIAL REGISTRATION
Retrospectively registered 2/16/2018, clinicaltrials.gov, Identifier: NCT03458702 .
背景
休息或急性运动均可降低状态焦虑，有证据表明运动可预防实验室引起的焦虑升高。尚无研究探讨瑜伽是否提供针对实验室引起的焦虑的短期保护。本研究旨在检验急性瑜伽锻炼对状态焦虑和心率变异性（HRV）测量的影响，以确定瑜伽是否提供针对情绪图片刺激的短期保护。
方法
进行了一项随机重复测量交叉临床试验。40 名健康的女大学生在两天内分别完成了 30 分钟的瑜伽课程和时间匹配的坐姿休息。在每个条件之后，参与者观看 30 分钟的情绪图片刺激。在基线、条件后和暴露于情绪刺激后评估状态焦虑、心率和 HRV 的时域和频域测量值。使用条件 x 时间（2×3）重复测量方差分析对数据进行分析。
结果
事后比较表明：（1）瑜伽和休息后，状态焦虑均从基线显著降低到条件后（p=0.001），但在两种条件下暴露于情绪刺激后均恢复到基线值（p<0.001）；（2）心率在条件后到暴露后（p=0.020）和基线到暴露后（p=0.033）均降低；（3）HRV 的时域测量值在基线与条件后（p=0.019）、条件后与暴露后（p=0.007）以及基线与暴露后（p<0.001）之间均显示出 HRV 的显著增加。
结论
瑜伽和坐姿休息在条件后均能有效急性降低状态焦虑，但不能预防暴露后引起的焦虑反应。在暴露于情绪刺激图片后，两种瑜伽和安静休息条件下，从高频域到低频域的转变以及 HRV 的时域测量值均增加。
试验注册
于 2018 年 2 月 16 日进行回顾性注册，clinicaltrials.gov，标识符：NCT03458702。
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