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You Y, Ablitip A, Chen Y, Ding H, Chen K, Cui Y, Ma X. Saturation effects of the relationship between physical exercise and systemic immune inflammation index in the short-sleep population: a cross-sectional study. BMC Public Health 2024; 24:1920. [PMID: 39020383 PMCID: PMC11256404 DOI: 10.1186/s12889-024-19432-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 07/10/2024] [Indexed: 07/19/2024] Open
Abstract
BACKGROUND Short sleep can lead to an increase in inflammation and regular exercise has been shown to have a mitigation effect. However, the association between physical exercise (PE) and inflammation in the short sleep population is an unknown and intriguing issue. METHODS NHANES dataset spanning the years 2007 to 2018 were analyzed. To investigate the relationship mentioned above, we carried out multivariate linear regression models controlling for sociodemographic and lifestyles factors. The systemic immune inflammation index (SII) served as a reflection of inflammatory potential, calculated as the product of platelet count, neutrophil count, and divided by the lymphocyte count. Self-reported questionnaires were used to collect sleep and exercise information. RESULTS A total of 14,664 participants were included for final analysis. Across the three models, PE showed significant negative associations with SII as a continuous variable [Crude Model, β (95% CI): -1.261(-1.600, -0.922), p < 0.001; Model 1, β (95% CI): -1.005(-1.344, -0.666), p < 0.001; Model 2, β (95% CI): -0.470(-0.827, -0.112), p = 0.011]. The consistent nature of the findings persisted when investigating physical exercise (PE) as a categorized variable. By two-piecewise linear regression model, we calculated a saturation effect of PE with the inflection point as 2400 MET-minutes/week. CONCLUSION This study suggested that performing no more than 2400 MET-minutes/week of PE was associated with lower SII levels in the short sleep population, while more PE might not bring additional benefits.
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Affiliation(s)
- Yanwei You
- Division of Sports Science & Physical Education, Tsinghua University, Beijing, China
- School of Social Sciences, Tsinghua University, Beijing, China
- IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Alimjan Ablitip
- Division of Sports Science & Physical Education, Tsinghua University, Beijing, China
- School of Social Sciences, Tsinghua University, Beijing, China
- IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Yuquan Chen
- School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing & Health Sciences, Monash University, Melbourne, VIC, Australia
| | - Hao Ding
- Division of Sports Science & Physical Education, Tsinghua University, Beijing, China
- School of Social Sciences, Tsinghua University, Beijing, China
- IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Keshuo Chen
- Division of Sports Science & Physical Education, Tsinghua University, Beijing, China
- School of Social Sciences, Tsinghua University, Beijing, China
- IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Yicong Cui
- Division of Sports Science & Physical Education, Tsinghua University, Beijing, China
- School of Social Sciences, Tsinghua University, Beijing, China
- IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Xindong Ma
- Division of Sports Science & Physical Education, Tsinghua University, Beijing, China.
- IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China.
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Moussa-Chamari I, Farooq A, Romdhani M, Washif JA, Bakare U, Helmy M, Al-Horani RA, Salamh P, Robin N, Hue O. The relationship between quality of life, sleep quality, mental health, and physical activity in an international sample of college students: a structural equation modeling approach. Front Public Health 2024; 12:1397924. [PMID: 39050600 PMCID: PMC11266085 DOI: 10.3389/fpubh.2024.1397924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 06/21/2024] [Indexed: 07/27/2024] Open
Abstract
Objective We assessed the direct and indirect relationships between sleep quality, mental health, and physical activity with quality of life (QOL) in college and university students. Methods In a cross-sectional design, 3,380 college students (60% females; age = 22.7 ± 5.4) from four continents (Africa: 32%; America: 5%; Asia: 46%; and Europe: 15%; others: 2%) completed the Pittsburgh Sleep Quality Index (PSQI); Insomnia Severity Index (ISI); Epworth Sleepiness Scale (ESS); the Depression, Anxiety, and Stress Scale 21 (DASS); the International Physical Activity Questionnaire short-form (IPAQ); and the World Health Organization Quality of Life-BREF (WHOQOL-Brief). Results We showed that sleep quality, insomnia, and depression had direct negative effects on the physical domain of QOL (β = -0.22, -0.19, -0.31, respectively, p < 0.001). There was a strong negative direct association between depression and the psychological domain of QOL (β = -0.60, z = -22.21, p < 0.001). Both stress and PSQI had direct effects on social relationships QOL (β = 0.11; z = 4.09; and β = -0.13; z = -7.40, respectively, p < 0.001). However, depression had the strongest direct impact on social relationships QOL (β = -0.41, z = -15.79, p < 0.001). Conclusion The overall QOL of university students is associated with their sleep quality, mental health, and physical activity warranting further interventional studies aiming at improving students' quality of life.
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Affiliation(s)
- Imen Moussa-Chamari
- Physical Education Department, College of Education, Qatar University, Doha, Qatar
- Laboratoire ACTES, UFR-STAPS, Université des Antilles, Pointe-à-Pitre, France
| | - Abdulaziz Farooq
- Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar
| | - Mohamed Romdhani
- Interdisciplinary Laboratory in Neurosciences, Physiology and Psychology: Physical Activity, Health and Learning (LINP2), UFR STAPS (Faculty of Sport Sciences), Paris Nanterre University, Nanterre, France
- Physical Activity, Sport and Health, UR18JS01, National Observatory of Sports, Tunis, Tunisia
| | - Jad Adrian Washif
- Sports Performance Division, Institut Sukan Negara Malaysia (National Sports Institute of Malaysia), Kuala Lumpur, Malaysia
| | - Ummukulthoum Bakare
- Nigeria Olympic Committee, Medical and Scientific Commission, Lagos, Nigeria
| | - Mai Helmy
- Psychology Department, College of Education, Sultan Qaboos University, Muscat, Oman
| | | | - Paul Salamh
- College of Health Sciences, University of Indianapolis, Indianapolis, IN, United States
| | - Nicolas Robin
- Laboratoire ACTES, UFR-STAPS, Université des Antilles, Pointe-à-Pitre, France
| | - Olivier Hue
- Laboratoire ACTES, UFR-STAPS, Université des Antilles, Pointe-à-Pitre, France
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Saner NJ, Lee MJC, Pitchford NW, Broatch JR, Roach GD, Bishop DJ, Bartlett JD. The effect of sleep restriction, with or without high-intensity interval exercise, on behavioural alertness and mood state in young healthy males. J Sleep Res 2024; 33:e13987. [PMID: 37434366 DOI: 10.1111/jsr.13987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 06/01/2023] [Accepted: 06/20/2023] [Indexed: 07/13/2023]
Abstract
Mood state and alertness are negatively affected by sleep loss, and can be positively influenced by exercise. However, the potential mitigating effects of exercise on sleep-loss-induced changes in mood state and alertness have not been studied comprehensively. Twenty-four healthy young males were matched into one of three, 5-night sleep interventions: normal sleep (NS; total sleep time (TST) per night = 449 ± 22 min), sleep restriction (SR; TST = 230 ± 5 min), or sleep restriction and exercise (SR + EX; TST = 235 ± 5 min, plus three sessions of high-intensity interval exercise (HIIE)). Mood state was assessed using the profile of mood states (POMS) and a daily well-being questionnaire. Alertness was assessed using psychomotor vigilance testing (PVT). Following the intervention, POMS total mood disturbance scores significantly increased for both the SR and SR + EX groups, and were greater than the NS group (SR vs NS; 31.0 ± 10.7 A.U., [4.4-57.7 A.U.], p = 0.020; SR + EX vs NS; 38.6 ± 14.9 A.U., [11.1-66.1 A.U.], p = 0.004). The PVT reaction times increased in the SR (p = 0.049) and SR + EX groups (p = 0.033) and the daily well-being questionnaire revealed increased levels of fatigue in both groups (SR; p = 0.041, SR + EX; p = 0.026) during the intervention. Despite previously demonstrated physiological benefits of performing three sessions of HIIE during five nights of sleep restriction, the detriments to mood, wellness, and alertness were not mitigated by exercise in this study. Whether alternatively timed exercise sessions or other exercise protocols could promote more positive outcomes on these factors during sleep restriction requires further research.
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Affiliation(s)
- Nicholas J Saner
- Institute for Health and Sport (iHeS), College of Sport and Exercise Science, Victoria University, Melbourne, Australia
| | - Matthew J-C Lee
- Institute for Health and Sport (iHeS), College of Sport and Exercise Science, Victoria University, Melbourne, Australia
| | - Nathan W Pitchford
- School of Health Sciences, University of Tasmania, Launceston, Australia
| | - James R Broatch
- Institute for Health and Sport (iHeS), College of Sport and Exercise Science, Victoria University, Melbourne, Australia
| | - Greg D Roach
- Appleton Institute for Behavioural Science, Central Queensland University, Adelaide, Australia
| | - David J Bishop
- Institute for Health and Sport (iHeS), College of Sport and Exercise Science, Victoria University, Melbourne, Australia
| | - Jonathan D Bartlett
- Institute for Health and Sport (iHeS), College of Sport and Exercise Science, Victoria University, Melbourne, Australia
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Ayotte B, Cristini J, Lotlikar M, Parwanta Z, Cossette P, Gasparovic L, Yee-Wong M, He QY, Doyon J, Dal Maso F, Carrier J, Steib S, Robertson EM, Roig M. Does Cardiorespiratory Fitness Protect Memory from Sleep Deprivation? Med Sci Sports Exerc 2023; 55:1632-1640. [PMID: 37379255 DOI: 10.1249/mss.0000000000003200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
INTRODUCTION Animal studies have demonstrated that physical exercise can protect memory from the effects of sleep deprivation (SD). We examined whether having a high cardiorespiratory fitness (V̇O 2peak ) is associated with an enhanced capacity to encode episodic memory after one night of SD. METHODS Twenty-nine healthy young participants were allocated into either an SD group ( n = 19) that underwent 30 h of uninterrupted wakefulness, or a sleep control (SC) group ( n = 10) that followed a regular sleep routine. Following either the SD or SC period, participants were asked to view 150 images as the encoding part of the episodic memory task. Ninety-six hours after viewing the images, participants returned to the laboratory to perform the recognition part of the episodic memory task, which required the visual discrimination of the 150 images previously presented from 75 new images introduced as distractors. Cardiorespiratory fitness (V̇O 2peak ) was assessed with a bike ergometer graded exercise test. Group differences in memory performance were assessed with independent t tests and associations between V̇O 2peak and memory with multiple linear regression. RESULTS The SD group showed a significant increase in subjective fatigue (mean difference [MD] [standard error {SE}] = 38.94 [8.82]; P = 0.0001) and a worse capacity to identify the original 150 images (MD [SE] = -0.18 [0.06]; P = 0.005) and discriminate them from distractors (MD [SE] = -0.78 [0.21] P = 0.001). When adjusted for fatigue, higher V̇O 2peak was significantly associated with better memory scores in the SD (R 2 = 0.41; β [SE] = 0.03 [0.01]; P = 0.015) but not in the SC group ( R2 = 0.23; β [SE] = 0.02 [0.03]; P = 0.408). CONCLUSIONS These results confirm that SD before encoding impairs the capacity to create robust episodic memories and provide preliminary support to the hypothesis that maintaining high levels of cardiorespiratory fitness could have a protective effect against the disruptive effects of sleep loss on memory.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Julien Doyon
- Montreal Neurological Institute, McConnell Brain Imaging Centre, Department of Neurology & Neurosurgery, McGill University, Montreal, Quebec, CANADA
| | | | - Julie Carrier
- Department of Psychology, Université de Montréal, Montréal, Québec, CANADA
| | - Simon Steib
- Human Movement, Training and Active Aging Department, Institute of Sports and Sports Science, Heidelberg University, Heidelberg, GERMANY
| | - Edwin M Robertson
- Institute of Neuroscience and Psychology, University of Glasgow, Glasgow, UNITED KINGDOM
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Frimpong E, Mograss M, Zvionow T, Paez A, Aubertin-Leheudre M, Bherer L, Pepin V, Robertson EM, Dang-Vu TT. Acute evening high-intensity interval training may attenuate the detrimental effects of sleep restriction on long-term declarative memory. Sleep 2023; 46:zsad119. [PMID: 37084788 PMCID: PMC10334486 DOI: 10.1093/sleep/zsad119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 04/05/2023] [Indexed: 04/23/2023] Open
Abstract
Recent evidence shows that a nap and acute exercise synergistically enhanced memory. Additionally, human-based cross-sectional studies and animal experiments suggest that physical exercise may mitigate the cognitive impairments of poor sleep quality and sleep restriction, respectively. We evaluated whether acute exercise may offset sleep restriction's impairment of long-term declarative memory compared to average sleep alone. A total of 92 (82% females) healthy young adults (24.6 ± 4.2 years) were randomly allocated to one of four evening groups: sleep restriction only (S5, 5-6 h/night), average sleep only (S8, 8-9 h/night), high-intensity interval training (HIIT) before restricted sleep (HIITS5), or HIIT before average sleep (HIITS8). Groups either followed a 15-min remote HIIT video or rest period in the evening (7:00 p.m.) prior to encoding 80 face-name pairs. Participants completed an immediate retrieval task in the evening. The next morning a delayed retrieval task was given after their subjectively documented sleep opportunities. Long-term declarative memory performance was assessed with the discriminability index (d') during the recall tasks. While our results showed that the d' of S8 (0.58 ± 1.37) was not significantly different from those of HIITS5 (-0.03 ± 1.64, p = 0.176) and HIITS8 (-0.20 ± 1.28, p = 0.092), there was a difference in d' compared to S5 (-0.35 ± 1.64, p = 0.038) at the delayed retrieval. These results suggest that the acute evening HIIT partially reduced the detrimental effects of sleep restriction on long-term declarative memory.
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Affiliation(s)
- Emmanuel Frimpong
- Sleep, Cognition and Neuroimaging Laboratory, Concordia University, Montreal, QC, Canada
- Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montreal, QC, Canada
- PERFORM Center, Concordia University, Montreal, QC, Canada
- Centre de Recherche de l’Institut Universitaire de Gériatrie de Montréal, QC, Canada
| | - Melodee Mograss
- Sleep, Cognition and Neuroimaging Laboratory, Concordia University, Montreal, QC, Canada
- Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montreal, QC, Canada
- PERFORM Center, Concordia University, Montreal, QC, Canada
- Department of Psychology, Concordia University, Montreal, QC, Canada
- Centre de Recherche de l’Institut Universitaire de Gériatrie de Montréal, QC, Canada
| | - Tehila Zvionow
- Sleep, Cognition and Neuroimaging Laboratory, Concordia University, Montreal, QC, Canada
- Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montreal, QC, Canada
- PERFORM Center, Concordia University, Montreal, QC, Canada
| | - Arsenio Paez
- Sleep, Cognition and Neuroimaging Laboratory, Concordia University, Montreal, QC, Canada
- Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montreal, QC, Canada
- PERFORM Center, Concordia University, Montreal, QC, Canada
| | - Mylene Aubertin-Leheudre
- Centre de Recherche de l’Institut Universitaire de Gériatrie de Montréal, QC, Canada
- Département des Sciences de l’activité physique, GRAPA, Université du Québec à Montréal, Montréal, QC, Canada
| | - Louis Bherer
- Centre de Recherche de l’Institut Universitaire de Gériatrie de Montréal, QC, Canada
- Department of Medicine and Centre de recherche de l’Institut de cardiologie de Montréal, Université de Montréal, QC, Canada
| | - Véronique Pepin
- Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montreal, QC, Canada
- PERFORM Center, Concordia University, Montreal, QC, Canada
- Centre de recherche, CIUSSS du Nord-de l’Île-de-Montréal, Montréal, QC, Canada
| | - Edwin M Robertson
- School of Psychology and Neuroscience, University of Glasgow, Glasgow, UK
| | - Thien Thanh Dang-Vu
- Sleep, Cognition and Neuroimaging Laboratory, Concordia University, Montreal, QC, Canada
- Department of Health, Kinesiology, and Applied Physiology, Concordia University, Montreal, QC, Canada
- PERFORM Center, Concordia University, Montreal, QC, Canada
- Department of Psychology, Concordia University, Montreal, QC, Canada
- Centre de Recherche de l’Institut Universitaire de Gériatrie de Montréal, QC, Canada
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Bloomberg M, Brocklebank L, Hamer M, Steptoe A. Joint associations of physical activity and sleep duration with cognitive ageing: longitudinal analysis of an English cohort study. THE LANCET. HEALTHY LONGEVITY 2023; 4:e345-e353. [PMID: 37421962 DOI: 10.1016/s2666-7568(23)00083-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/05/2023] [Accepted: 05/11/2023] [Indexed: 07/10/2023] Open
Abstract
BACKGROUND Physical activity and sleep duration are key factors associated with cognitive function and dementia risk. How physical activity and sleep interact to influence cognitive ageing is not well explored. We aimed to examine the associations of combinations of physical activity and sleep duration with 10-year cognitive trajectories. METHODS In this longitudinal study, we analysed data from the English Longitudinal Study of Ageing collected between Jan 1, 2008, and July 31, 2019, with follow-up interviews every 2 years. Participants were cognitively healthy adults aged at least 50 years at baseline. Participants were asked about physical activity and nightly sleep duration at baseline. At each interview, episodic memory was assessed using immediate and delayed recall tasks and verbal fluency using an animal naming task; scores were standardised and averaged to produce a composite cognitive score. We used linear mixed models to examine independent and joint associations of physical activity (lower physical activity or higher physical activity, based on a score taking into account frequency and intensity of physical activity) and sleep duration (short [<6 h], optimal [6-8 h], or long [>8 h]) with cognitive performance at baseline, after 10 years of follow-up, and the rate of cognitive decline. FINDINGS We included 8958 respondents aged 50-95 years at baseline (median follow-up 10 years [IQR 2-10]). Lower physical activity and suboptimal sleep were independently associated with worse cognitive performance; short sleep was also associated with faster cognitive decline. At baseline, participants with higher physical activity and optimal sleep had higher cognitive scores than all combinations of lower physical activity and sleep categories (eg, difference between those with higher physical activity and optimal sleep vs those with lower physical activity and short sleep at baseline age 50 years was 0·14 SDs [95% CI 0·05-0·24]). We found no difference in baseline cognitive performance between sleep categories within the higher physical activity category. Those with higher physical activity and short sleep had faster rates of cognitive decline than those with higher physical activity and optimal sleep, such that their scores at 10 years were commensurate with those who reported low physical activity, regardless of sleep duration (eg, difference in cognitive performance after 10 years of follow-up between those with higher physical and optimal sleep and those with lower physical activity and short sleep was 0·20 SDs [0·08-0·33]; difference between those with higher physical activity and optimal sleep and those with lower physical activity and short sleep was 0·22 SDs [0·11-0·34]). INTERPRETATION The baseline cognitive benefit associated with more frequent, higher intensity physical activity was insufficient to ameliorate the more rapid cognitive decline associated with short sleep. Physical activity interventions should also consider sleep habits to maximise benefis of physical activity for long-term cognitive health. FUNDING UK Economic and Social Research Council.
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Affiliation(s)
- Mikaela Bloomberg
- Department of Behavioural Science and Health, University College London, London, UK.
| | - Laura Brocklebank
- Department of Behavioural Science and Health, University College London, London, UK
| | - Mark Hamer
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Andrew Steptoe
- Department of Behavioural Science and Health, University College London, London, UK
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Chen P, Ban W, Wang W, You Y, Yang Z. The Devastating Effects of Sleep Deprivation on Memory: Lessons from Rodent Models. Clocks Sleep 2023; 5:276-294. [PMID: 37218868 DOI: 10.3390/clockssleep5020022] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/11/2023] [Accepted: 05/11/2023] [Indexed: 05/24/2023] Open
Abstract
In this narrative review article, we discuss the role of sleep deprivation (SD) in memory processing in rodent models. Numerous studies have examined the effects of SD on memory, with the majority showing that sleep disorders negatively affect memory. Currently, a consensus has not been established on which damage mechanism is the most appropriate. This critical issue in the neuroscience of sleep remains largely unknown. This review article aims to elucidate the mechanisms that underlie the damaging effects of SD on memory. It also proposes a scientific solution that might explain some findings. We have chosen to summarize literature that is both representative and comprehensive, as well as innovative in its approach. We examined the effects of SD on memory, including synaptic plasticity, neuritis, oxidative stress, and neurotransmitters. Results provide valuable insights into the mechanisms by which SD impairs memory function.
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Affiliation(s)
- Pinqiu Chen
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, School of Pharmacy, Yantai University, Yantai 264005, China
| | - Weikang Ban
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Wenyan Wang
- Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, School of Pharmacy, Yantai University, Yantai 264005, China
| | - Yuyang You
- School of Automation, Beijing Institute of Technology, Beijing 100081, China
| | - Zhihong Yang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
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McCarter SJ, Hagen PT, St Louis EK, Rieck TM, Haider CR, Holmes DR, Morgenthaler TI. Physiological markers of sleep quality: A scoping review. Sleep Med Rev 2022; 64:101657. [PMID: 35753151 DOI: 10.1016/j.smrv.2022.101657] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 05/16/2022] [Accepted: 05/29/2022] [Indexed: 10/18/2022]
Abstract
Understanding the associations between adequate sleep, performance and health outcomes is vital, yet a major limitation in the design and interpretation of studies of sleep and performance is the variability of subjective and objective markers used to assess sleep quality. The aim of this scoping review is to investigate how various physiological signals recorded during sleep or wakefulness relate to objective measures of cognitive or physical performance and subjectively perceived sleep quality to inform conceptual understanding of the elusive, amorphous, and multi-dimensional construct of sleep quality. We also aimed to suggest priorities for future areas of research in sleep quality and performance. We searched six databases ultimately yielding 439 studies after duplicate removal. Sixty-five studies were selected for full review. In general, correlations between objectively measured sleep and objective performance or subjectively assessed sleep quality were weak to moderate. Slow wave sleep was moderately correlated with better performance on tasks of vigilance, motor speed, and executive function as well as better subjective sleep quality and feeling well-rested, suggesting that slow wave sleep may be important for sleep quality and optimal daytime performance. However, these findings were inconsistent across studies. Increased sleep fragmentation was associated with poorer subjective sleep quality in both polysomnographic and actigraphic studies. Studies which simultaneously assessed physiologic sleep measures, performance measures and subjective sleep perception were few, limiting the ability to evaluate correlations between subjective and objective outcomes concurrently in the same individuals. Factors influencing the relationship between sleep quality and performance include circadian variability, sleep inertia, and mismatch between sleep stages studied and outcome measures of choice. Ultimately, the determination of "quality sleep" remains largely subjective and inconsistently quantifiable by current measures. Methods evaluating sleep as a continuous measure rather than traditional sleep stages may provide an intriguing approach to future studies of sleep and performance. Future well-designed studies using novel measures of sleep or multimodal ambulatory wearables assessing the three domains of sleep and performance (objective sleep physiology, objective performance, and subjective sleep quality) are needed to better define quality sleep.
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Affiliation(s)
- Stuart J McCarter
- Center for Sleep Medicine, Mayo Clinic and Foundation, Rochester, MN, USA; Department of Neurology, Mayo Clinic and Foundation, Rochester, MN, USA.
| | - Philip T Hagen
- Department of Internal Medicine, Mayo Clinic and Foundation, Rochester, MN, USA
| | - Erik K St Louis
- Center for Sleep Medicine, Mayo Clinic and Foundation, Rochester, MN, USA; Department of Neurology, Mayo Clinic and Foundation, Rochester, MN, USA; Department of Internal Medicine, Mayo Clinic and Foundation, Rochester, MN, USA
| | - Thomas M Rieck
- Mayo Clinic Healthy Living Program, Mayo Clinic and Foundation, Rochester, MN, USA
| | - Clifton R Haider
- Section of Biostatistics, Mayo Clinic and Foundation, Rochester, MN, USA
| | - David R Holmes
- Section of Biostatistics, Mayo Clinic and Foundation, Rochester, MN, USA
| | - Timothy I Morgenthaler
- Center for Sleep Medicine, Mayo Clinic and Foundation, Rochester, MN, USA; Department of Internal Medicine, Mayo Clinic and Foundation, Rochester, MN, USA; Department of Pulmonology, Mayo Clinic and Foundation, Rochester, MN, USA
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Validity and reliability of the movement assessment battery second edition test in children with and without motor impairment: A prospective cohort study. Ann Med Surg (Lond) 2022; 77:103672. [PMID: 35638021 PMCID: PMC9142614 DOI: 10.1016/j.amsu.2022.103672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 11/23/2022] Open
Abstract
Background Examining the reliability and validity of the second edition movement assessment battery test (MABC-2) in children with and without motor impairment. Materials and methods In this prospective cohort study, the MABC-2 test and developmental coordination disorder questionnaire 2007 (DCDQ′07) were completed by children and their parents. By using 95% confidence intervals, minimal detectable change (MDC95) was calculated, and concurrent validity was investigated. By applying the MABC-2 test as a reference standard (cut-off fifth centile), sensitivity and specificity were examined. Results 273 children (mean age: 6.3 ± 2.3 years; 70% male) with and without motor impairment completed the investigation. For test-retest reliability, intra-class correlation coefficients (ICCs) was >0.89 for the MABC-2 test. The MDC95 value for the motor skill test was 5.76. There was a significant correlation between the MABC-2 test and DCDQ′07 (r = 0.60, P < 0.001) and the Go/No-Go test (r = 0.50, P < 0.001). Overall, the sensitivity was very high (90%), the specificity was low (46%), and positive and negative predictive values were high (69% and 81%, respectively). Conclusion The MABC-2 test can be considered a valid and reliable motor skill assessment tool for children with and without motor impairment. The MABC-2 test is a valid tool for children with and without motor impairment. The MABC-2 test is a reliable tool for children with and without motor impairment. The MABC-2 is a sensitive tool for detecting motor skill performance impairments.
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Quiquempoix M, Sauvet F, Erblang M, Van Beers P, Guillard M, Drogou C, Trignol A, Vergez A, Léger D, Chennaoui M, Gomez-Merino D, Rabat A. Effects of Caffeine Intake on Cognitive Performance Related to Total Sleep Deprivation and Time on Task: A Randomized Cross-Over Double-Blind Study. Nat Sci Sleep 2022; 14:457-473. [PMID: 35321359 PMCID: PMC8935086 DOI: 10.2147/nss.s342922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 12/07/2021] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION It is widely admitted that both total sleep deprivation (TSD) and extended task engagement (Time-On-Task, TOT) induce a cognitive fatigue state in healthy subjects. Even if EEG theta activity and adenosine both increase with cognitive fatigue, it remains unclear if these modifications are common mechanisms for both sustained attention and executive processes. METHODS We performed a double-blind counter-balanced (placebo (PCBO) and caffeine (CAF) - 2×2.5 mg/kg/24 h)) study on 24 healthy subjects (33.7 ± 5.9 y). Subjects participated in an experimental protocol including an habituation/training day followed by a baseline day (D0 and D1) and a total sleep deprivation (TSD) day beginning on D1 at 23:00 until D2 at 21:00. Subjects performed the psychomotor vigilance test (PVT) assessing sustained attention, followed by the executive Go-NoGo inhibition task and the 2-NBack working memory task at 09:15 on D1 and D2. RESULTS We showed differential contributions of TSD and TOT on deficits in sustained attention and both executive processes. An alleviating effect of caffeine intake is only observed on sustained attention deficits related to TSD and not at all on TOT effect. The caffeine dose slows down the triggering of sustained attention deficits related to TOT effect. DISCUSSION These results suggest that sustained attention deficits induced by TSD rely on the adenosinergic mechanism whereas TOT effect observed for both sustained attention and executive would not.
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Affiliation(s)
- Michael Quiquempoix
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Fabien Sauvet
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Mégane Erblang
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France.,LBEPS, Univ Evry, IRBA, University of Paris-Saclay, Paris, France
| | - Pascal Van Beers
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Mathias Guillard
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Catherine Drogou
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Aurélie Trignol
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Anita Vergez
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Damien Léger
- VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France.,Centre du sommeil et de la vigilance, Hôpital Hôtel Dieu AP-HP, Paris, 75004, France
| | - Mounir Chennaoui
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Danielle Gomez-Merino
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
| | - Arnaud Rabat
- Department of Operational Environments, Fatigue and Vigilance Team, French Armed Forces Biomedical Research Institute (IRBA), Paris, France.,VIFASOM Team (EA 7330), University of Paris - Hôtel Dieu AP-HP Hospital, Paris, France
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11
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Effects of High-Intensity Interval Training on Sleep: A Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182010973. [PMID: 34682718 PMCID: PMC8535574 DOI: 10.3390/ijerph182010973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/07/2021] [Accepted: 10/13/2021] [Indexed: 12/14/2022]
Abstract
Objectives: To use a quantitative approach to examine the effects of high-intensity interval training (HIIT) interventions on sleep for adults. Methods: PubMed, Ebsco, Web of Science, Cochrane Central Register of Controlled Trials, the China National Knowledge Infrastructure, and Wanfang Data were searched from their inception to December 2020. Intervention studies with a control group that examined the effects of HIIT interventions on sleep were included in this meta-analysis. The risk of bias was assessed using the tool provided by the Cochrane Handbook for Systematic Reviews of Interventions. Effect sizes (ESs), calculated as weighted mean difference (WMD) and standardized mean difference (SMD), were used to examine the effects of objective outcomes and subjective outcomes separately. Results: A large increase in sleep quality (SQ) reflected by the Pittsburgh Sleep Quality Index global scores [WMD = −0.90, 95%CI (−1.72, −0.07), p = 0.03, n = 8] and a small-to-medium favorable effect on sleep efficiency (SE) [SMD = 0.43, 95%CI (0.20, 0.65), p = 0.0002, n = 10] were found after HIIT intervention. In addition, sub-analyses results suggest that ESs were moderated by the type, duration and frequency, as well as the length of the HIIT intervention. Conclusions: HIIT may be a promising way to improve overall subjective SQ and objective SE. PROSPERO, protocol registration number: CRD42021241734.
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12
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Genetics and Cognitive Vulnerability to Sleep Deprivation in Healthy Subjects: Interaction of ADORA2A, TNF-α and COMT Polymorphisms. Life (Basel) 2021; 11:life11101110. [PMID: 34685481 PMCID: PMC8540997 DOI: 10.3390/life11101110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/02/2021] [Accepted: 10/13/2021] [Indexed: 11/17/2022] Open
Abstract
Several genetic polymorphisms differentiate between healthy individuals who are more cognitively vulnerable or resistant during total sleep deprivation (TSD). Common metrics of cognitive functioning for classifying vulnerable and resilient individuals include the Psychomotor Vigilance Test (PVT), Go/noGo executive inhibition task, and subjective daytime sleepiness. We evaluated the influence of 14 single-nucleotide polymorphisms (SNPs) on cognitive responses during total sleep deprivation (continuous wakefulness for 38 h) in 47 healthy subjects (age 37.0 ± 1.1 years). SNPs selected after a literature review included SNPs of the adenosine-A2A receptor gene (including the most studied rs5751876), pro-inflammatory cytokines (TNF-α, IL1-β, IL-6), catechol-O-methyl-transferase (COMT), and PER3. Subjects performed a psychomotor vigilance test (PVT) and a Go/noGo-inhibition task, and completed the Karolinska Sleepiness Scale (KSS) every 6 h during TSD. For PVT lapses (reaction time >500 ms), an interaction between SNP and SDT (p < 0.05) was observed for ADORA2A (rs5751862 and rs2236624) and TNF-α (rs1800629). During TSD, carriers of the A allele for ADORA2A (rs5751862) and TNF-α were significantly more impaired for cognitive responses than their respective ancestral G/G genotypes. Carriers of the ancestral G/G genotype of ADORA2A rs5751862 were found to be very similar to the most resilient subjects for PVT lapses and Go/noGo commission errors. Carriers of the ancestral G/G genotype of COMT were close to the most vulnerable subjects. ADORA2A (rs5751862) was significantly associated with COMT (rs4680) (p = 0.001). In conclusion, we show that genetic polymorphisms in ADORA2A (rs5751862), TNF-α (rs1800629), and COMT (rs4680) are involved in creating profiles of high vulnerability or high resilience to sleep deprivation. (NCT03859882).
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13
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Roig M, Cristini J, Parwanta Z, Ayotte B, Rodrigues L, de Las Heras B, Nepveu JF, Huber R, Carrier J, Steib S, Youngstedt SD, Wright DL. Exercising the Sleepy-ing Brain: Exercise, Sleep, and Sleep Loss on Memory. Exerc Sport Sci Rev 2021; 50:38-48. [PMID: 34669627 DOI: 10.1249/jes.0000000000000273] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT We examine the novel hypothesis that physical exercise and sleep have synergistic effects on memory. Exercise can trigger mechanisms that can create an optimal brain state during sleep to facilitate memory processing. The possibility that exercise could counteract the deleterious effects of sleep deprivation on memory by protecting neuroplasticity is also discussed.
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Affiliation(s)
- Marc Roig
- Memory and Motor Rehabilitation Laboratory (MEMORY-LAB), Feil and Oberfeld Research Centre, Jewish Rehabilitation Hospital, Montreal Center for Interdisciplinary Research in Rehabilitation, Laval, Canada. School of Physical and Occupational Therapy, Faculty of Medicine, McGill University, Montréal, Canada. Integrative Program of Neuroscience, McGill University, Montréal, Canada. Child Development Center, University Children's Hospital Zurich, Zurich, Switzerland. Neuroscience Center Zurich, University and ETH Zurich, Zurich, Switzerland. Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland. Department of Psychology, Université de Montréal, Montréal, Québec, Canada. Human Movement, Training and Active Aging Department, Institute of Sports and Sports Science, Heidelberg University, Germany. College of Nursing and Health Innovation and College of Health Solutions, Arizona State University, Phoenix, USA. Non-Invasive Brain Stimulation Laboratory, Department of Kinesiology, Texas A&M University, College Station, USA
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14
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Billing DC, Fordy GR, Friedl KE, Hasselstrøm H. The implications of emerging technology on military human performance research priorities. J Sci Med Sport 2021; 24:947-953. [DOI: 10.1016/j.jsams.2020.10.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/22/2020] [Accepted: 10/12/2020] [Indexed: 10/23/2022]
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15
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Sewell KR, Erickson KI, Rainey-Smith SR, Peiffer JJ, Sohrabi HR, Brown BM. Relationships between physical activity, sleep and cognitive function: A narrative review. Neurosci Biobehav Rev 2021; 130:369-378. [PMID: 34506842 DOI: 10.1016/j.neubiorev.2021.09.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 08/23/2021] [Accepted: 09/03/2021] [Indexed: 11/19/2022]
Abstract
Physical activity and exercise can improve cognitive function and reduce the risk for dementia. Other lifestyle factors, including sleep, are associated with cognitive function and dementia risk, and exercise is an effective therapeutic strategy for improving sleep. Based on these associations, it has been hypothesised that sleep might be an important mediator for the effects of exercise on cognition. Here, we review the current literature to evaluate whether sleep and physical activity are independently or jointly associated with cognitive function. The extant literature in this area is minimal, and the causal relationships between physical activity, sleep and cognition have not been examined. A small number of cross-sectional studies in this area suggest that physical activity may attenuate some of the negative impact that poor sleep has on cognition, and also that sleep may be a mechanism through which physical activity improves cognitive abilities. Further research may enable the development of individually tailored intervention programs to result in the greatest cognitive benefit, ultimately delaying the onset of Alzheimer's disease.
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Affiliation(s)
- Kelsey R Sewell
- Discipline of Exercise Science, College of Science, Health, Engineering and Education, Murdoch University, 90 South Street, Murdoch, WA, Australia.
| | - Kirk I Erickson
- Discipline of Exercise Science, College of Science, Health, Engineering and Education, Murdoch University, 90 South Street, Murdoch, WA, Australia; Department of Psychology, University of Pittsburgh, 4200 Fifth Ave, PA, United States
| | - Stephanie R Rainey-Smith
- Australian Alzheimer's Research Foundation, Sarich Neuroscience Research Institute, 8 Verdun Street, Nedlands, WA, Australia; Centre For Healthy Ageing, Health Futures Institute, Murdoch University, 90 South Street, Murdoch, WA, Australia; School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, Australia; School of Psychological Science, University of Western Australia, 35 Stirling Highway, Crawley, WA, Australia
| | - Jeremiah J Peiffer
- Discipline of Exercise Science, College of Science, Health, Engineering and Education, Murdoch University, 90 South Street, Murdoch, WA, Australia; Centre For Healthy Ageing, Health Futures Institute, Murdoch University, 90 South Street, Murdoch, WA, Australia
| | - Hamid R Sohrabi
- Australian Alzheimer's Research Foundation, Sarich Neuroscience Research Institute, 8 Verdun Street, Nedlands, WA, Australia; Centre For Healthy Ageing, Health Futures Institute, Murdoch University, 90 South Street, Murdoch, WA, Australia; School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, Australia; Department of Biomedical Sciences, Macquarie University, Balaclava Road, NSW, Australia
| | - Belinda M Brown
- Discipline of Exercise Science, College of Science, Health, Engineering and Education, Murdoch University, 90 South Street, Murdoch, WA, Australia; Australian Alzheimer's Research Foundation, Sarich Neuroscience Research Institute, 8 Verdun Street, Nedlands, WA, Australia; Centre For Healthy Ageing, Health Futures Institute, Murdoch University, 90 South Street, Murdoch, WA, Australia; School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, Australia
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16
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Vaseghi S, Arjmandi-Rad S, Kholghi G, Nasehi M. Inconsistent effects of sleep deprivation on memory function. EXCLI JOURNAL 2021; 20:1011-1027. [PMID: 34267613 PMCID: PMC8278215 DOI: 10.17179/excli2021-3764] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 05/26/2021] [Indexed: 12/12/2022]
Abstract
In this review article, we aimed to discuss the role of sleep deprivation (SD) in learning and memory processing in basic and clinical studies. There are numerous studies investigating the effect of SD on memory, while most of these studies have shown the impairment effect of SD. However, some of these studies have reported conflicting results, indicating that SD does not impair memory performance or even improves it. So far, no study has discussed or compared the conflicting results of SD on learning and memory. Thus, this important issue in the neuroscience of sleep remains unknown. The main goal of this review article is to compare the similar mechanisms between the impairment and the improvement effects of SD on learning and memory, probably leading to a scientific solution that justifies these conflicting results. We focused on the inconsistent effects of SD on some mechanisms involved in learning and memory, and tried to discuss the inconsistent effects of SD on learning and memory.
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Affiliation(s)
- Salar Vaseghi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.,Department of Cognitive Neuroscience, Institute for Cognitive Science Studies (ICSS), Tehran, Iran
| | - Shirin Arjmandi-Rad
- Institute for Cognitive & Brain Sciences, Shahid Beheshti University, Tehran, Iran
| | - Gita Kholghi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohammad Nasehi
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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Sleep and the GH/IGF-1 axis: Consequences and countermeasures of sleep loss/disorders. Sleep Med Rev 2019; 49:101223. [PMID: 31778943 DOI: 10.1016/j.smrv.2019.101223] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 10/21/2019] [Accepted: 10/21/2019] [Indexed: 12/15/2022]
Abstract
This article presents an up-to-date review of the state-of-the-art knowledge regarding the effect of sleep on the anabolic growth hormone/insulin-like growth factor-1 (GH/IGF-1) axis. This axis is involved in learning and memory and neuroprotection at the central level, and in the crosstalk between sleep and the immune system, with respect to its anti-inflammatory properties. We also aim to provide insight into the consequences of sleep loss on cognitive capacities in healthy individuals and patients with obstructive sleep apnea (OSA), regarding the mechanistic association with the GH/IGF-1 axis. Finally, this review examines the inflammatory/endocrine pathways that are affected by sleep loss, and which may consequently interact with the GH/IGF-1 axis. The deleterious effects of sleep loss include fatigue, and can cause several adverse age-dependent health outcomes. It is therefore important to improve our understanding of the fundamental physiology underlying these effects in order to better apply non-pharmacological countermeasures (e.g., sleep strategies, exercise training, continuous positive airway pressure therapy) as well as pharmacological solutions, so as to limit the deleterious consequences of sleep loss/disorders.
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