Clinical trials
Sleep Disorders, Circadian Rhythm clinical trials
Below are recruiting sleep disorders, circadian rhythm clinical trials, each written for real people, not researchers. We’re tracking 56 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07294781Recruiting
Circadian rhythm study in healthy adults during wakefulness
This study explores how your internal body clock and sense of time change during 36 hours of staying awake. You will stay in a lab and complete simple tasks to help researchers understand the link between circadian rhythms and time perception.
AarhusAges 23–45 - NCT07329283Recruiting
Nighttime nutrition and sleep health study
This study looks at how eating at night affects your sleep and body clock. You will spend two nights in a sleep lab to test the effects of a small meal before bed.
Salt Lake City, UtahAges 18–35 - NCT07410936Recruiting
Self-Acupressure for Social Jet Lag in Female Students
This study tests whether a daily self-acupressure routine (gently pressing on specific points on your body) can help reduce social jet lag—the mismatch between your sleep schedule on school days versus free days—in female health-science students. It involves a 12-week home practice and tracking your sleep quality.
Niğde, MerkezAges 18–25 - NCT07438912Recruiting
Mind After Midnight: A study on late-night thinking and suicide risk
This study looks at how thinking changes late at night in people who have had suicidal thoughts in the past 6 months. The goal is to understand risk and find better ways to help.
Tucson, ArizonaAges 18–55 - NCT06505005Enrolling by invitation
Pain Relief Patch for Muscle Pain and Better Sleep
This study tests whether a pain relief patch worn on the skin can help with moderate back, shoulder, or other muscle pain and improve sleep. You will be given either the active patch or a placebo patch to wear.
Tyrone, GeorgiaAges 18–65 - NCT06336525Enrolling by invitation
Sleep health in rural Appalachia and Mississippi Delta
This study examines how sleep is linked to heart and metabolic health in people living in rural Appalachia and the Mississippi Delta. If you are already part of the RURAL Study, you may be able to join this sleep-focused part of the research.
Boston, MassachusettsAges 25–65 - NCT07715721Recruiting
Acupuncture and Traditional Chinese Medicine for Sarcopenia and Sleep Problems in Older Adults
This study looks at how Traditional Chinese Medicine body types and sleep patterns relate to muscle loss (sarcopenia) in older adults, and tests whether acupoint stimulation (like acupuncture without needles) can help.
TainanAges 20 years+ - NCT07339592Enrolling by invitation
How meal timing affects sleep in medical residents
This study tests whether changing when and what you eat for two weeks can improve sleep quality and how your body's natural clock works. It is for medical residents in Jordan who do not have chronic health issues or sleep disorders.
AmmanAges 25 years+ - NCT07685262Recruiting
Bright light therapy for better daytime function in students
This trial tests if morning bright light therapy can help university students feel more awake and function better during the day. You may be eligible if you live in shared student housing and don't have a diagnosed sleep problem.
Hung HomAges 18 years+ - NCT07677111Recruiting
Chronotype alignment and time perception study
This study explores how your natural sleep-wake pattern (chronotype) affects the way you perceive time. If you are a clear early bird or night owl, you may be invited to attend one early-morning and one late-evening session.
Hong KongAges 18–55 - NCT06535178Recruiting
Sleep and heart health in fibromyalgia
This study looks at how sleep affects heart health in people with fibromyalgia (a condition causing widespread pain). Researchers will test if improving sleep can help your heart work better.
Portland, OregonAges 18–50 - NCT05829044Recruiting
How light exposure affects sleep and body clock by sex and age
This study looks at how non-visual light (light that isn’t just for seeing) affects your sleep timing and circadian rhythms, and whether the effects differ by sex and age. It may help researchers design better light-based or sleep-support strategies in the future.
Boston, MassachusettsAges 18–85 - NCT05336084Recruiting
Study how sleep timing affects mood and thinking in teens
This study looks at how your body clock and sleep “pressure” affect reward feelings and thinking control. It may help researchers understand teen sleep patterns and how they connect to brain and behavior.
Pittsburgh, PennsylvaniaAges 13–18 - NCT07595185Enrolling by invitation
Brain Stimulation to Improve Sleep in Chronic Insomnia
This study tests whether accelerated repetitive transcranial magnetic stimulation (rTMS)—a non-invasive brain stimulation technique—can improve sleep architecture and quality in people with chronic insomnia. The treatment may help you fall asleep faster and sleep longer without medication.
San Francisco, CaliforniaAges 18–85 - NCT06544018Recruiting
Sleep and body clock study for CAPS patients and family members
This study looks at how CAPS (a genetic condition that causes inflammation) affects sleep and daily body rhythms. It compares people with CAPS to healthy family members living in the same home, to understand differences without any treatment being tested.
BronAges 6 years+ - NCT06296823Recruiting
Daily rhythms in healthy young adults
This study looks at how your body's daily rhythms (your internal clock) work by measuring natural chemicals in your body. It's for healthy people aged 17-35 who live at or above Denver's altitude.
Boulder, ColoradoAges 17–35 - NCT07542756RecruitingPhase 4
Testing Common Sleep Medications for Insomnia
This study compares how well different over-the-counter and prescription sleep medications work for insomnia. Researchers will guide you through trying medications one at a time to find what works best for your sleep problems.
Philadelphia, PennsylvaniaAges 18–80 - NCT04743271Recruiting
Test how food timing affects the body’s daily rhythms
This study looks at how the timing of meals (and daily timing habits) affects your body’s natural clock and related health measures. It involves healthy, generally low-risk participants and may help researchers understand how timing affects metabolism and sleep.
Portland, OregonAges 18–40 - NCT05807178Recruiting
Light treatment to stabilize sleep-wake rhythm in ICU delirium
This trial tests whether controlled bright light in the ICU can improve confusion and the sleep-wake rhythm in adults who develop delirium. If it works, it may help patients become more clear-minded sooner while they recover in intensive care.
BerlinAges 18 years+ - NCT07292597Recruiting
Circadian timing and time perception study for healthy adults
This trial looks at how your internal body clock affects the way you perceive time. It may help you understand your own sleep patterns and daily rhythms better.
AarhusAges 23–45 - NCT04917419Recruiting
Light therapy and talk therapy for sleep issues in bipolar disorder
This trial tests whether bright light therapy (luminotherapy) and/or structured education and coaching (psychoeducation) can improve sleep and daily body rhythm in people with bipolar disorder. It may help if your bipolar symptoms come with troublesome sleeping patterns.
PoitiersAges 18–65 - NCT05539716Recruiting
Treating sleep apnea to study effects on metabolism
This study tests a sleep apnea treatment approach and looks at how it may affect your body’s metabolism. You may be eligible if you’re an adult with sleep apnea and meet health and medication rules, and possibly if you already use a PAP machine regularly.
Miami, FloridaAges 18–70 - NCT06627205Recruiting
Sleep Restriction Therapy for children with autism
This study tests a therapy called Sleep Restriction Therapy to help children with autism who have trouble sleeping. It aims to see if this approach can improve sleep without changing other treatments.
Stanford, CaliforniaAges 6–12 - NCT07049783Recruiting
How exercise timing affects blood pressure response
This study looks at how the time of day you exercise affects your blood pressure response. It is for young adults with slightly elevated blood pressure who are generally healthy, not on certain medications, and do not have sleep or chronic health issues.
Newark, DelawareAges 18–39
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Common questions
- Are there clinical trials for sleep disorders, circadian rhythm?
- Yes. Clin2 currently lists 56 recruiting sleep disorders, circadian rhythm studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a sleep disorders, circadian rhythm trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a sleep disorders, circadian rhythm trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.