View clinical trials related to Sleep.
Filter by:The main goal of this study is to determine whether exposure to a narrow band of green light (NBGL) improved sleep quality in healthy subjects. This is a within-subject study design that examines NBGL effects on sleep onset, sleep fractures (i.e., how many times per night the subjects wake up), total sleep duration, and sleep quality using high-resolution assessments. To complete the study, each participant will complete a 30-day, daily sleep diary while using white light (i.e., being in regular room light) during the last 2 hours of their waking period. This period will be defined as the baseline/control arm of the study. After completing this phase 1, subjects will receive a lamp designed to emit the narrow band of green light and again be asked to complete a 30-day, daily sleep diary, but this timer while using the NBGL light (i.e., being in what appears green light) during the last 2 hours of their waking period. This period will be defined as the active arm of the study. After completing this phase 2,
This is a cross-sectional study with an optional intervention that will examine how extreme sleep durations relate to cardiovascular health, physical activity, and sleep quality by studying three groups of participants: short sleepers (≤ 6 hrs), long sleepers (≥ 9 hrs), and average duration sleepers (7-8 hrs). The optional intervention asks participants to maintain an 8-hour per night regular sleep schedule for one week.
The goal of this research is to understand the role of sleep on memory function in early childhood. Specifically, we seek to examine how promoted naps vs. promoted waking in habitual and non-habitual napping children may impact overnight sleep physiology and subsequent memory consolidation.
To evaluate whether it is able to perform sleep staging with EEG data recorded from 2 electrodes behind each ear.
Chronic circadian misalignment and sleep restriction peak during late adolescence, and are associated with morning daytime sleepiness, poor academic performance, conduct problems, depressed mood, suicidal ideation, substance use, insulin resistance, and obesity. Bright light exposure from light boxes can shift rhythms earlier (phase advance) to facilitate earlier sleep onset and reduce morning circadian misalignment and the associated risks. To phase advance circadian rhythms, the investigators' PRCs showed that the ideal time to begin light exposure was slightly before wake-up time and light should be avoided around bedtime because this is when light produces maximum phase delay shifts. An unexpected finding from these results, however, was a second advancing region in the afternoon (~6 to 9 h after habitual wake-up time) suggesting that afternoon light may have more circadian phase advancing ability than traditionally thought. The overall goal of this mechanistic study is to follow-up on the unexpected PRC findings and test whether individually-timed afternoon light alone and in combination with morning bright light can shift circadian rhythms earlier in older adolescents. Four groups will be compared in a randomized parallel group design: afternoon bright light, morning bright light, morning + afternoon bright light, and a dim room light control. Adolescents will complete a 2-week protocol. After a baseline week with a stable sleep schedule, adolescents will live in the laboratory for 7 days. Sleep/dark and the time of bright light exposure will gradually shift earlier. Bright light (~5000 lux) will be timed individually based on his/her stable baseline sleep schedule. The first 3-h morning bright light exposure will begin 1 h before wake on the first morning. The first 3-h afternoon bright light exposure will begin 5 h after wake. The morning + afternoon exposures will begin at the same times, but each exposure will be 1.5 h so that a total of 3 h of bright light per day will be given to each group except the dim light control group. Phase shifts of the circadian clocks marked by the dim light melatonin onset (DLMO) is the main outcome. Investigators hypothesize that afternoon bright light will work synergistically with morning bright light to produce larger shifts than morning or afternoon bright light alone. These data could challenge the current understanding of how to use bright light to shift circadian rhythms earlier.
The purpose of this study is to determine whether modifying the timing of nutrition support from overnight to daytime enhances sleep quality, preserves circadian rhythms, and improves overall inflammation and cardiometabolic profiles in postoperative patients in the cardiac surgical ICU on enteral nutrition.
MB-College (MBC) is an 9-week, 9 session program (i.e., the study intervention being tested in the RCT) providing systematic and intensive training in mindfulness meditation practices, applied to health behaviors relevant to college students and young adults. The MBC intervention will be administered live, online via the free video conferencing platform, Zoom, to all eligible study participants enrolled in the active arms of the study. In addition to the 9-week, 9 session MBC class, referred to as "standard dose MBC" from here on out, investigators will also be testing a "low-dose MBC" version of the intervention, where each weekly session will run 1.5 hours in length rather than 2.5 hours. This is a 3-arm randomized controlled trial. The standard-dose and low-dose versions of the MBC intervention will be compared to a third arm of the study, a health education active control group. Members of the control group will be offered the MBC class upon completion of the research study. The Study Aims are to: (1) Evaluate feasibility and acceptability of MBC delivered in two online formats (standard dose vs. low dose). (2) Evaluate impacts of MBC standard-dose vs. MBC low-dose vs. health education control group on health conditions relevant for emerging adults, demonstrated to be influenced by MBC in a prior study, specifically depressive symptoms, loneliness, and sedentary activity. (3) Explore mechanisms by which MBC may exert effects on aforementioned health conditions, including interoceptive awareness, decentering, and perceived stress. Participant Population: young adults aged 18-29 years of age, residing in the United States who screen eligible will be invited to enroll. Students will be screened using a two-part process taking place online. Research assessments at baseline and 3-month will take place digitally using Qualtrics, LLC (Provo, UT, USA) survey management tool. Participants will be sent secure links via email that can be accessed with their participant identification number. Enrolled participants will be randomly assigned to one of three groups: (1) standard MBC; (2) low-dose MBC or (3) health education control group. The control group will be given the opportunity to participate in the intervention after the study MBC course is completed and follow-up assessments have been administered.
This study tests the effectiveness of a new educational intervention designed to improve sleep outcomes among an older adult population.
The investigators propose to use a parallel group, randomized controlled trial to test the efficacy of a 13-week personalized approach to reducing smoking intervention versus a second approach using a different health intervention on smoking cessation, healthy sleep metrics, and biomarkers of cardiovascular risk in a sample of 200 treatment-seeking smokers who are adults living with HIV (ALHIV). To enroll in the study, treatment-seeking ALHIV smokers will undergo phone and in-person study eligibility assessments, including a history, physical examination, screening laboratory tests, and an overnight in-home objective sleep assessment. Eligible subjects (N=200) will be randomized to the 13-week Approach 1 (N=100) or Approach 2 (N=100) condition. All subjects will receive a 12-week course of varenicline (beginning in week 2) and 8 individual 15-minute smoking cessation counseling sessions [weeks 1, 2, 3 (target quit date), 5, 7, 9, 11, 13]. At each in-person counseling session, 30-45 minutes of Approach 1 or Approach 2 counseling will be provided as well. While receiving varenicline, the study team will monitor for side effects and changes to blood pressure at each study visit for safety reasons. Study measures are collected at all time points including EOT (week 13), and 6-month follow-up (6MFU).
The study will be done among undergraduate students in Sohag University for assessment of quality of sleep and its determinants .It will be done in practical faculties and theoretical faculties .