What is Sleep?
Although everyone needs to sleep to maintain their health, the question “what is sleep?” has proven surprisingly difficult. During the state of sleep, the brain exhibits profound changes.
It is now believed the function of sleep is to clear metabolic waste products from the pathways of the brain. This helps explain why healthy sleep must be sufficient in both duration and depth.

What Conditions Are Associated With Sleep?
The most common health condition associated with sleep is insomnia. Insomnia is difficulty falling asleep, staying asleep, or both. Sleep disturbances can be physiological in nature (for example, Restless Legs Syndrome) or psychological (for example, nightmares.)
Experts have estimated that about 25% of Americans develop some degree of insomnia in any given year. In 75% of cases, it passes without long-term damage to sleep habits.
Other common sleep disorders include:
- Snoring
- Sleep apnea, “pauses” in breathing often caused by soft tissue blockage in the airway
- Sleep hypoventilation, trouble breathing in sleep caused by respiratory muscle weakness
- Restless Legs Syndrome, which causes discomfort only alleviated by moving the legs
- Bruxism, the grinding of the teeth during sleep, which can damage the teeth and jaw
Sleep medicine experts also recognize several less common sleep disorders. These include things like narcolepsy, nightmares and night terrors, and Rapid Eye Movement Behavior Disorder.
Maintaining Sleep Health
Many chronic sleep conditions arise with no known cause. However, maintaining good sleep hygiene can help. Sleep hygiene refers to the whole collection of habits that affect sleep health.
In general, it is a good idea to develop a consistent bedtime and routine for “going to bed.” Discontinue the use of phones and other “screens” an hour before bed, since the blue light of these devices inhibits the brain’s natural response to reduced lighting at night.
Remember, many factors can contribute to sleep health issues:
- Certain medications, such as those used for high blood pressure and asthma
- Chronic pain disorders and other conditions that cause persistent discomfort
- Stress in your personal or work life and conditions like anxiety or depression
Each individual has a slight variance in sleep need. Likewise, the duration of sleep needed does change depending on life stage. However, it is important to know everyone needs about eight hours of nightly sleep to maintain mental and physical health.
Medical Research on Sleep
With the answers to key questions on “why do we sleep?” coming into view, sleep researchers are continuing to pursue clinical sleep studies looking for new sleep disorder treatments.
Sleep clinical care has undergone revolutionary changes in recent years thanks to imaging technology that precisely pinpoints sleep-related changes in the human brain at any age.
Current Clinical Trials on Sleep
This list includes all clinical trials on sleep recognized by ClinicalTrials.gov. To add sleep clinical trials to our list, contact us.
- The Use of Multiple Sensors to Track Sleep in Nightshift Workerson March 18, 2026 at 4:00 am
Conditions: Sleep; Nightshift Work Interventions: Other: Single-Sensor Tracking (In-Lab); Other: Multi-Sensor Sleep Tracking (In-Lab); Other: Multi-Sensor Sleep Tracking (At-Home) Sponsors: Henry Ford Health System; Michigan State University Recruiting
- IMST for Dementia Risk Reductionon March 18, 2026 at 4:00 am
Conditions: Systolic Blood Pressure; Blood Pressure; Depression - Major Depressive Disorder; Anxiety; Sleep Quality; Physical Function; Cognitive Function Interventions: Device: Inspiratory Muscle Strength Training High-Resistance; Device: Inspiratory Muscle Strength Training Low-Resistance Sponsors: Florida State University; National Institutes of Health (NIH) Recruiting
- Social Media Diet and Psychological Outcomes in University Studentson March 18, 2026 at 4:00 am
Conditions: Loneliness; Fear of Missing Out; Sleep Quality Interventions: Behavioral: Social Media Diet Sponsors: Gümüşhane Universıty Recruiting
- Studying Melatonin and Recovery in Teenson March 18, 2026 at 4:00 am
Conditions: Juvenile; Scoliosis; Scoliosis Idiopathic; Scoliosis; Adolescence; Scoliosis;Congenital; Kyphosis; Spondylolisthesis; Pectus Surgery; Hip Surgery Interventions: Dietary Supplement: Fast-Dissolve Melatonin Pill; Other: Fast-Dissolve Placebo Pill Sponsors: Stanford University; National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) Recruiting
- Online COgnitive Behavioural Therapy for Sleep and Mental Health for Older Adults With Insomnia and Subjective Cognitive Complaintson March 18, 2026 at 4:00 am
Conditions: Insomnia Interventions: Behavioral: cognitive behavioral therapy for sleep, anxiety, and depression; Behavioral: education about healthy nutrition habits and communication in older age Sponsors: Centre de Recherche de l'Institut Universitaire de Geriatrie de Montreal Recruiting
- Clinical Effectiveness of the "PICU Up!" Multifaceted Early Mobility Intervention for Critically Ill Childrenon March 18, 2026 at 4:00 am
Conditions: Child; Intensive Care Unit Acquired Weakness; Critical Illness; Hospital Acquired Pressure Ulcer Interventions: Other: PICU Up! Sponsors: Johns Hopkins University; Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Recruiting
- Effects of Tai Chi and Yoga on Flexibility, Anxiety, and Sleep Quality in Womenon March 18, 2026 at 4:00 am
Conditions: Flexibility; Anxiety; Sleep Quality Interventions: Other: Tai Chi; Other: Yoga Sponsors: Istanbul University - Cerrahpasa Recruiting
- Severe Label Expansion for EVO Products Trialon March 17, 2026 at 4:00 am
Conditions: Obstructive Sleep Apnea Interventions: Device: EVO Sleep and Snore Device Sponsors: ProSomnus Sleep Technologies Recruiting
- Test-retest Reliability of the Maintenance of Wakefulness Test in Participants With Hypersomnolenceon March 17, 2026 at 4:00 am
Conditions: Disorders of Excessive Somnolence Interventions: Diagnostic Test: First MWT; Diagnostic Test: second MWT; Device: actimetry Sponsors: University Hospital, Bordeaux; Société Française de Recherche et Médecine du Sommeil (S.F.R.M.S) Recruiting
- Comparing Digital Therapy, Trazodone, and Daridorexant for Menopause-Related Insomnia Symptomson March 17, 2026 at 4:00 am
Conditions: Menopausal Women; Insomnia Interventions: Behavioral: Cognitive behavioral therapy for insomnia (CBT-i); Drug: Trazodone; Drug: Daridorexant Sponsors: Brigham and Women's Hospital; Patient-Centered Outcomes Research Institute; University of Pittsburgh; University of Utah; Massachusetts General Hospital; Henry Ford Health System; Wake Forest University Health Sciences Recruiting
- MyVitalC: Sleep and Everyday Headache Managementon March 17, 2026 at 4:00 am
Conditions: Sleep; Headaches Interventions: Dietary Supplement: MyVitalC (ESS60 in Extra Virgin Olive Oil) Sponsors: Efforia, Inc Recruiting
- Light Exposure, Migraine Outcomes, and Sleep Qualityon March 17, 2026 at 4:00 am
Conditions: Migraine Headache; Sleep; Photophobia Interventions: Other: Ambient Lighting Condition Sponsors: Arizona State University; Flinn Foundation Recruiting
Why Are More Clinical Trials on Sleep Necessary?
There may be no single “cure for insomnia”, but clinical trials on sleep help doctors develop effective sleep disorder treatment protocols for the various situations where sleep is disturbed.
Ongoing sleep research continues to redefine what we know about each of these conditions. Insomnia treatments are just one of the new sleep clinical resources coming from this effort.
Conclusion
The majority of American adults experience sleep disturbances at some point in life. With that in mind, clinical trials on sleep truly affect everyone. Unfortunately, sleep disorders are under-diagnosed – and those who suffer often do not pursue treatment. Participating in clinical studies on sleep is one way to help ensure you, and others, will rest better.
Content Box
- https://www.sciencedaily.com/releases/2018/06/180605154114.htm
- https://www.sleephealthfoundation.org.au/pdfs/Insomnia.pdf
- https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-future-of-sleep-studies
- https://www.sleepfoundation.org/insomnia/what-insomnia
- https://medlineplus.gov/sleepdisorders.html
- https://www.sleepfoundation.org/articles/sleep-hygiene