The effects of a single night of complete and partial sleep deprivation on physical and cognitive performance: A Bayesian analysis

ABSTRACT

This study investigated the effects of complete and partial sleep deprivation on multiple aspects of athletic performance. Ten males completed a cognitive function test, maximal handgrip strength, countermovement jump (CMJ) and a 15 min all out cycling test to assess aerobic performance. These tests were performed following 3 different sleep conditions; normal sleep (CON), a 4 hr sleep opportunity (PART) and complete sleep deprivation (DEP). Data were analysed using a Bayesian multi-level regression model to provide probabilities of impairment (p = %). Aerobic performance, CMJ and handgrip strength were impaired by 11.4% (p = 100%), 10.9% (p = 100%) and 6% (p = 97%) following DEP, while aerobic performance and CMJ were highly likely impaired by 4.1% (p = 90%) and 5.2% (p = 94%) following PART. Cognitive reaction time was not impacted by PART or DEP. In contrast the accuracy of responses was highly likely impaired by 2% (91) following DEP, while there was less certainty of impaired accuracy following PART (?1%, p = 73). Multiple aspects of physical and cognitive performance were impacted by sleep deprivation. The greatest detrimental effects were seen for aerobic performance and CMJ. Partial sleep deprivation equating to 4 hrs of sleep causes subtle, but potentially important negative impairments on athletic performance.     

Naps and Sleep Deprivation: Why Academic Libraries Should Consider Adding Nap Stations to their Services for Students

Since the invention of artificial light, people have been working, studying, and playing for longer hours than ever before. They are also sleeping less as a result. This article examines the impact of sleep deprivation on people generally, and specifically on college students. Students accrue a large sleep debt that impairs their ability to function adequately. Students suffering from sleep deprivation can be as impaired as if they are drunk. They suffer damage to their minds and bodies. Adequate sleep can repair this damage, but with the many demands on college students, they may be unlikely to be able to accomplish this. Studies have indicated that naps are beneficial in helping to reduce students' sleep debts. Universities are realizing the importance of naps, and university libraries may be ideal locations for napping stations. Several options of providing students with safe comfortable napping areas are discussed.     

磁力床垫对中长跑运动员心境状态和睡眠质量的影响

为检测磁力床垫对中长跑运动员心境状态和睡眠质量的影响,采用文献资料法、实验比较法、问卷调查法和数理统计法,以现役29名中长跑运动员为研究对象,其中15名为实验组（使用磁力床垫）、14名为对照组（使用普通床垫）,对他们大运动量训练后的心境状态和睡眠质量展开调查,结果表明：（1）使用磁力床垫的实验组在调节心境状态方面明显优于使用普通床垫的对照组,它能够明显缓解运动员疲劳、恢复精力、抚平慌乱情绪和有效处理纷乱情绪;（2）磁力床垫在中长跑运动员提高睡眠质量方面,主要体现在能够延长睡眠的有效时间。     

高原健康房对机体睡眠前后血氧饱和度的影响

目的：探讨高原健康房对移居者睡眠前后血氧饱和度（SaO2）的影响。方法：在海拔3 700 m建立＂高原健康房＂,10名移居高原1年半的健康青年入健康房休息和睡眠10 h,观察受试者睡眠前后SaO2的变化及出健康房后4 h内SaO2的改变,并与普通房间组比较。结果：健康房组第二日晨起安静时SaO2较睡眠前增高5.7%,差别有显著性（P〈0.01）,受试者出健康房后1 h、2 h的SaO2依次为（94.00±1.25）%、（93.40±0.70）%,与普通房间组比较差别均有显著性。结论：建立高原健康房可明显提高人体睡眠后的SaO2,改善睡眠质量。     

高校体育公共课教师相对剥夺感解析

对高校公体教师产生相对剥夺感的社会成因、外在表现及影响进行剖析,发现职业歧视是相对剥夺感的主要诱因,相对剥夺感直接导致职业倦怠,严重的相对剥夺感会导致产生犯罪心理,甚至实施犯罪,必须引起高度重视。否则,将严重阻碍高校体育目标及和谐校园、和谐社会目标的实现。     

Females exposed to 24 h of sleep deprivation do not experience greater physiological strain,but do perceive heat illness symptoms more severely,during exercise-heat stress

There is limited and inconclusive evidence surrounding the physiological and perceptual responses to heat stress while sleep deprived, especially for females. This study aimed to quantify the effect of 24 h sleep deprivation on physiological strain and perceptual markers of heat-related illness in females. Nine females completed two 30-min heat stress tests (HST) separated by 48 h in 39°C, 41% relative humidity at a metabolic heat production of 10 W · kg^?1. The non-sleep deprived HST was followed by the sleep deprivation (SDHST) trial for all participants during the follicular phase of the menstrual cycle. Physiological and perceptual measures were recorded at 5 min intervals during the HSTs. On the cessation of the HSTs, heat illness symptom index (HISI) was completed. HISI scores increased after sleep deprivation by 28 ± 16 versus 20 ± 16 (P = 0.01). Peak (39.40 ± 0.35°C vs. 39.35 ± 0.33°C) and change in rectal temperature (1.91 ± 0.21 vs. 1.93 ± 0.34°C), and whole body sweat rate (1.08 ± 0.31 vs. 1.15 ± 0.36 L · h^?1) did not differ (P > 0.05) between tests. No difference was observed in peak, nor rise in: heart rate, mean skin temperature, perceived exertion or thermal sensation during the HSTs. Twenty-four hours sleep deprivation increased perceptual symptoms associated with heat-related illness; however, no thermoregulatory alterations were observed.     

阻塞型睡眠呼吸暂停综合征与心力衰竭

阻塞性睡眠呼吸暂停综合征与心血管疾病密切相关,合并心力衰竭后果十分严重。探讨OSAS合并心力衰竭的发病概况、发病机制及治疗很有必要。     

跆拳道运动员运动性失眠调查分析

采用问卷调查法调查跆拳道运动员运动性失眠的发生状况及相关因素,为提高运动员的睡眠质量提供参考依据。结果：有超过一半的运动员睡眠质量较差;运动性失眠的主要症状是入睡困难,主要原因是环境因素,主要时期是赛前准备期,主要心理因素是训练或比赛期间暂遇挫折情绪抑郁,主要影响是身体疲劳,仅少数人会治疗运动性失眠。结论：运动性失眠普遍存在于跆拳道运动员中,应引起重视,寻求有效的方法改善其睡眠质量。     

Sleep/wake behaviour of endurance cyclists before and during competition

Good sleep is critical for optimising recovery and athletic performance. Yet, few studies have investigated how athletes sleep before and during competition. The aim of this study was to determine whether such sleep is poorer than that before a usual training day. Twenty-one male endurance cyclists’ (age: 19.9 ± 1.7 years) sleep/wake behaviour was assessed using wrist activity monitors for 11 nights, including a six-night baseline training phase, three nights before competition and two nights during competition. Cyclists had less sleep on the night before competition (6.5 ± 0.9 h) and during the first night of competition (6.8 ± 0.8 h) than at baseline (7.4 ± 0.6 h). Cyclists also went to bed and woke up earlier during competition than at baseline. Competition schedules and competition itself can disrupt the sleep/wake behaviour of athletes during competition. Future investigations should examine sleep during three stages of competition (i.e. before, during and after competition). This will help coaches develop a greater understanding of how sleep changes during different phases of competition and enable them to plan post-competition training programmes to ensure appropriate rest and recovery is obtained.     

太极拳对老年人睡眠质量的调查与分析

文章旨在调查与分析太极拳对老年人睡眠质量的影响。文章通过对吕梁市200名老年人进行调查与分析,结果指出:进行太极拳锻炼的老年人的睡眠质量高于普通老年人的睡眠,太极拳能有效地改善老年人的睡眠。