[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"chronotype\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:chronotype":27},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,5,0,[8,50,88,122,160],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":15,"eligibilityCriteria":16,"healthyVolunteers":17,"sex":18,"minAge":19,"maxAge":4,"enrollmentInfo":20,"targetDuration":4,"studyType":23,"phases":4,"briefSummary":24,"conditions":25,"keywords":30,"overallStatus":37,"whyStopped":4,"lastUpdateSubmitDate":38,"lastUpdatePostDateStruct":39,"startDateStruct":42,"completionDateStruct":44,"leadSponsor":46,"locationsCount":49},"100054162","sleep-chronotype-and-prosocial-allocation-decisions-100054162",false,"NCT07697092","Sleep, Chronotype, and Prosocial Allocation Decisions","Associations Between Sleep Quality, Circadian Timing, and Prosocial Allocation Decisions in Adults","SCPAD","Inclusion Criteria:\n\n* Aged 18 years or above.\n* Able to provide informed consent.\n* Able to understand English or Chinese study materials.\n* Able to complete computer-based behavioural tasks and self-report questionnaires.\n* Willing to complete a 7-day sleep diary.\n\nExclusion Criteria:\n\n* Aged under 18 years.\n* Unable to provide informed consent.\n* Unable to complete study materials in English or Chinese.\n* Prior participation in the same study.\n* Self-reported condition or circumstance that would make participation in a brief computer-based decision-making task or sleep-related questionnaires inappropriate or distressing.",true,"ALL","18 Years",{"count":21,"type":22},128,"ESTIMATED","OBSERVATIONAL","This observational behavioural study examines whether individual differences in sleep quality, sleep timing, and chronotype are associated with prosocial allocation decisions in adults. Participants will complete self-report sleep and circadian questionnaires, including the Pittsburgh Sleep Quality Index and the Munich Chronotype Questionnaire, a 7-day sleep diary, and a brief computer-based Dictator Game allocation task.\n\nThe study does not involve sleep deprivation, sleep restriction, treatment, clinical diagnosis, medication, or medical devices. Participants will not be asked to change their sleep schedule. The Dictator Game decisions are hypothetical and do not affect participants' compensation. The study is intended to describe associations between naturally occurring sleep-related individual differences and behavioural allocation choices, not to diagnose or treat sleep or mental health conditions.",[26,27,28,29],"Sleep Quality","Chronotype","Prosocial Decision-Making","Circadian Timing",[26,27,29,31,32,33,34,35,28,36],"Pittsburgh Sleep Quality Index","Munich Chronotype Questionnaire","Sleep Diary","Dictator Game","Prosocial Behavior","Allocation Decisions","NOT_YET_RECRUITING","2026-07-06",{"date":40,"type":41},"2026-07-13","ACTUAL",{"date":43,"type":22},"2026-07",{"date":45,"type":22},"2028-06",{"name":47,"class":48},"The Hong Kong Polytechnic University","OTHER",1,{"id":51,"slug":52,"hasResults":11,"nctId":53,"briefTitle":54,"officialTitle":55,"acronym":4,"eligibilityCriteria":56,"healthyVolunteers":17,"sex":18,"minAge":19,"maxAge":57,"enrollmentInfo":58,"targetDuration":4,"studyType":60,"phases":61,"briefSummary":63,"conditions":64,"keywords":68,"overallStatus":79,"whyStopped":4,"lastUpdateSubmitDate":80,"lastUpdatePostDateStruct":81,"startDateStruct":83,"completionDateStruct":85,"leadSponsor":87,"locationsCount":49},"100644966","chronotype-alignment-and-time-perception-100644966","NCT07677111","Chronotype Alignment and Time Perception","Circadian Match and Mismatch Effects on Temporal Cognition in Morning- and Evening-Type Adults","Inclusion Criteria:\n\n* Healthy adult, 18-40 years\n* Clear morning-type or evening-type on the Morningness-Eveningness Questionnaire (MEQ-SA); intermediate types excluded (state exact cut-offs, e.g. evening-type 41 or below, morning-type 59 or above)\n* Normal or corrected-to-normal visual acuity\n* Normal colour vision (e.g. Ishihara screening)\n* Fluent in the testing-site language (Danish, Chinese, or English)\n* Able to attend both an early-morning (about 08:00) and a late-evening (about 22:00) session\n\nExclusion Criteria:\n\n* Intermediate chronotype (MEQ in the middle band)\n* Night or rotating shift work in the past 3 months, or recent trans-meridian travel (more than 2 time zones in the past 4 weeks)\n* Diagnosed sleep disorder (e.g. insomnia, sleep apnoea)\n* Current psychiatric or neurological disorder\n* Use of sleep medication or psychoactive or CNS-active drugs\n* Colour-vision deficiency\n* Substance-use disorder","55 Years",{"count":59,"type":22},240,"INTERVENTIONAL",[62],"NA","People differ in chronotype - whether they function best in the morning (\"larks\") or the evening (\"owls\"). This study asks whether the match or mismatch between a person's chronotype and the time of day at which they are tested changes how they perceive time.\n\nHealthy morning-type and evening-type adults at three sites (Aarhus, Denmark; Changzhou, China; and Hong Kong) complete the same battery of perception and cognition tasks twice - once in the early morning (about 08:00) and once late in the evening (about 22:00), in counterbalanced order. The primary outcome is the accuracy (signed bias) of time-perception judgements; the key comparison is the interaction between chronotype and time of day (the \"synchrony effect\").\n\nSecondary measures include timing precision, the subjective passage of time, sleepiness, mood, colour perception (with and without blue-blocking glasses) and perceptual decision-making. By testing the same protocol across three cultures and latitudes, the study examines whether circadian match\u002Fmismatch effects on temporal cognition generalise across populations.",[27,65,66,67],"Circadian Rhythm","Sleep","Time Perception",[69,70,71,72,73,74,75,76,77,78],"chronotype","morningness-eveningness","synchrony effect","time perception","temporal cognition","circadian rhythm","time-of-day","duration discrimination","arousal","cross-cultural","RECRUITING","2026-06-29",{"date":82,"type":41},"2026-06-30",{"date":84,"type":41},"2025-09-01",{"date":86,"type":22},"2028-06-30",{"name":47,"class":48},{"id":89,"slug":90,"hasResults":11,"nctId":91,"briefTitle":92,"officialTitle":93,"acronym":94,"eligibilityCriteria":95,"healthyVolunteers":17,"sex":18,"minAge":19,"maxAge":96,"enrollmentInfo":97,"targetDuration":4,"studyType":60,"phases":99,"briefSummary":100,"conditions":101,"keywords":106,"overallStatus":37,"whyStopped":4,"lastUpdateSubmitDate":113,"lastUpdatePostDateStruct":114,"startDateStruct":116,"completionDateStruct":118,"leadSponsor":120,"locationsCount":49},"100617855","chrono-align-a-chronotype-based-chrono-nutrition-intervention-in-post-bariatric-patients-100617855","NCT07324044","Chrono-ALIGN: A Chronotype-Based Chrono-Nutrition Intervention in Post-Bariatric Patients","Chrono-ALIGN Trial: The Impact of Chronotype-Based Chrono-Nutrition on Metabolic Health, Gut Microbiota, Appetite, and Circadian Alignment in Post-Bariatric Surgery Patients: A Randomized Controlled Trial","Chrono-ALIGN","Inclusion Criteria:\n\n* Adults aged 18-50 years who underwent Sleeve Gastrectomy (SG) 6 Months prior to enrollment.\n* Have achieved ≥50% of excess weight loss post-surgery (to ensure initial success).\n* Current BMI between 25-40 kg\u002Fm².\n* No major postoperative complications and cleared for a regular diet by their healthcare provider.\n* Participants must be able to align their eating schedule within a daytime window (morning to evening), ensuring that the first meal is consumed in the early part of the day and the last meal is completed before late evening, in accordance with chrono-nutrition guidelines.\n\nExclusion Criteria:\n\n* • Pregnancy or planned pregnancy during the study period, and post menopaused females\n\n  * Current diagnosis of severe psychiatric illness that may interfere with adherence (e.g., untreated major depression, psychosis, severe eating disorders).\n  * Active malignancy or serious chronic disease unrelated to obesity that may confound outcomes (e.g., advanced renal failure, uncontrolled liver disease).\n  * Use of medications known to significantly alter circadian rhythm or metabolism (e.g., corticosteroids, melatonin therapy) within the last 3 months.\n  * Inability to comply with study requirements (dietary interventions, sample collection, or follow-up visits).Participants who have previously undergone revision bariatric surgery.\n  * Individuals following intermittent fasting regimens prior to the study.","50 Years",{"count":98,"type":22},246,[62],"This randomized controlled trial will evaluate the impact of chrono-nutrition, a dietary approach that aligns meal timing with the body's circadian rhythms, on weight change, metabolic outcomes, appetite, and gut microbiota in post-bariatric surgery patients. A total of 246 adults who underwent sleeve gastrectomy at least six months earlier will be enrolled at King Saud Medical City. Participants will be randomized to receive either standard post-bariatric nutritional care or personalized chrono-nutrition based on individual chronotype. Outcomes include weight change, metabolic biomarkers, dietary behaviors, sleep patterns, and gut microbiota composition. The study aims to determine whether integrating chrono-nutrition into post-bariatric follow-up can enhance metabolic health and improve long-term health.",[102,103,104,105,27,65],"Obesity (Disorder)","Morbid Obesity","Bariatric Sleeve Gastrectomy","Meal Time",[107,108,109,110,111,112],"chrononutrition","Bariatric Surgery","Gastric Sleeve","Gut Microbiota","Appetite","Meal Timing","2025-12-23",{"date":115,"type":41},"2026-01-07",{"date":117,"type":22},"2026-01-01",{"date":119,"type":22},"2028-12-01",{"name":121,"class":48},"King Saud University",{"id":123,"slug":124,"hasResults":11,"nctId":125,"briefTitle":126,"officialTitle":127,"acronym":4,"eligibilityCriteria":128,"healthyVolunteers":17,"sex":18,"minAge":19,"maxAge":129,"enrollmentInfo":130,"targetDuration":4,"studyType":60,"phases":132,"briefSummary":133,"conditions":134,"keywords":139,"overallStatus":37,"whyStopped":4,"lastUpdateSubmitDate":151,"lastUpdatePostDateStruct":152,"startDateStruct":154,"completionDateStruct":156,"leadSponsor":158,"locationsCount":49},"100615273","pain-perception-and-exercise-induced-hypoalgesia-across-circadian-rhythms-100615273","NCT07290465","Pain Perception and Exercise-Induced Hypoalgesia Across Circadian Rhythms","Exploring Pain Perception Through Exercise-Induced Hypoalgesia Across Circadian Rhythms for Healthy Participants","Inclusion Criteria:\n\n* Healthy participants\n* age 18 to 40 years\n* good level of English that allow the enrolled participant to provide informed consent and complete the questionnaires provided\n* being categorized as \"moderate\" in the International Physical Activity Questionnaire (IPAQ)\n\nExclusion Criteria:\n\n* inability to report pain intensity reliably\n* consumption of narcotics or tobacco products\n* regularly taking pain medications and analgesics\n* pregnant or planning to get pregnant\n* surgery within the last 12 months\n* acute or chronic pain conditions\n* uncontrolled hypertension\n* cardiovascular diseases, pulmonary diseases, neurological diseases with significant changes in somatosensory and pain perception, metabolic diseases, serious systemic diseases or conditions that restrict normal daily activities, inflammatory conditions (e.g. rheumatoid arthritis), or orthopedic injuries\n* intolerable pain during the pain perception test\n* serious psychiatric conditions (e.g., schizophrenia and bipolar disorder) or psychological disorders (e.g., depression) that may affect pain thresholds (16).\n* Severe sleep disorders and circadian rhythm disturbances\n* BMI \\> 30\n* serious fatigue or delayed-onset muscle soreness (9) at least 24 h after exercise sessions or a sudden change in activity for more than one week","40 Years",{"count":131,"type":22},56,[62],"The goal of this randomized crossover clinical trial is to investigate whether exercise-induced hypoalgesia (EIH) is influenced by circadian rhythm in healthy adults aged 18-40 years.\n\nThe main questions it aims to answer are:\n\n* Does the time of day (morning vs. evening) influence changes in pain perception following exercise?\n* Do chronotype, sex, or stimulation site (bony vs. muscular) alter the magnitude of this effect?\n\nParticipants will:\n\n* Complete questionnaires\n* Undergo quantitative sensory testing\n* Attend both morning and evening sessions in randomized crossover order",[135,65,136,137,27,138],"Exercise Induced Hypoalgesia","Pain Perception","Healthy Participants","Physical Therapy",[140,136,65,27,137,141,142,143,144,145,146,147,138,148,149,150],"Exercise-Induced Hypoalgesia","High-Intensity Functional Training","Supervised Deep Breathing","Pressure Pain Threshold (PPT)","Pain pressure tolerance threshold (PPTol)","Quantative Sensory Testing","Bony Landmarks","Muscular Landmarks","Randomized Control Trial","Crossover","Pain Management","2025-12-04",{"date":153,"type":41},"2025-12-18",{"date":155,"type":22},"2026-01",{"date":157,"type":22},"2026-04",{"name":159,"class":48},"Medipol University",{"id":161,"slug":162,"hasResults":11,"nctId":163,"briefTitle":164,"officialTitle":165,"acronym":166,"eligibilityCriteria":167,"healthyVolunteers":17,"sex":18,"minAge":19,"maxAge":168,"enrollmentInfo":169,"targetDuration":4,"studyType":60,"phases":171,"briefSummary":172,"conditions":173,"keywords":177,"overallStatus":37,"whyStopped":4,"lastUpdateSubmitDate":193,"lastUpdatePostDateStruct":194,"startDateStruct":196,"completionDateStruct":198,"leadSponsor":200,"locationsCount":49},"100610994","resistance-exercise-and-sleep-quality-by-chronotype-100610994","NCT07234812","Resistance Exercise and Sleep Quality by Chronotype","The Effects of Tailored Resistance Exercise on Sleep Quality in Relation to Chronotype","TRE-SLEEP","Inclusion Criteria:\n\n* Age between 18 and 35 years\n* Generally healthy, with mild to moderate sleep disturbance as categorized by the Pittsburgh Sleep Quality Index (PSQI)\n* Body Mass Index (BMI) \\\u003C 35 kg\u002Fm²\n* No physical or organic limitations or diseases that would prevent participation in physical activity\n* Non-smoker and non-alcoholic\n* Caffeine consumption ≤ 2 cups per day (including coffee and energy drinks)\n* Have not participated in more than 60 minutes\u002Fweek of usual moderate-to-vigorous physical activity in the past 6 months, categorized as \"moderate\" on the International Physical Activity Questionnaire-Short Form (IPAQ-SF)\n* No clinically diagnosed sleep apnea or other medical\u002Fpsychiatric disorders responsible for sleep complaints\n* Regular sleep schedule (no night shifts or transmeridian travel) in the 30 days prior to study enrollment\n* Able to speak and write English\n\nExclusion Criteria:\n\n* Current use of medications or psychotherapeutic drugs for insomnia or other psychiatric disorders\n* Use of melatonin or other sleep aids in the past month\n* Currently performing any aerobic or mind-body exercise classes (e.g., yoga, Pilates)\n* Habitual daytime napping\n* History of epilepsy or other convulsive disorders\n* Pregnant individuals\n* Habitual or recent use (within the past 30 days) of illegal drugs, psychotropic drugs, hypnotics, stimulants, or analgesics","35 Years",{"count":170,"type":22},64,[62],"This study examines whether doing moderate resistance exercises in the morning can improve sleep quality and well-being in young adults. Participants with different daily activity patterns (morning or evening types) will take part in an 8-week online exercise program. The study will compare how exercise affects sleep, mood, and daily rhythm across these groups.",[138,174,175,26,27,65,176],"Resistance Exercise","Sleep Disturbances","Health Behavior \u002F Well-Being",[178,179,27,180,181,182,183,184,185,138,186,187,188,189,190,191,192],"sleep disturbance","Sleep quality","Morningness-eveningness","Circadian rhythm","Resistance exercise","Home-based exercise","Sleep and exercise","Physical activity and sleep","Exercise","Telerehabilitation","Munich Chronotype Questionnaire (MCTQ)","Pittsburgh Sleep Quality Index (PSQI)","Mood (BRUMS, DASS-21)","Randomized controlled trial","Physical therapy and rehabilitation","2025-11-18",{"date":195,"type":41},"2025-11-20",{"date":197,"type":22},"2025-12",{"date":199,"type":22},"2026-05",{"name":159,"class":48}]