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.
- Improving Sleep, Decision-Making, and Eating in Adolescents With Obesityon July 20, 2026 at 4:00 am
Conditions: Adolescent Overweight; Adolescent Obesity; Sleep; Eating Behaviors; Dietary Intake Interventions: Behavioral: Lifestyle Modification and Sleep Intervention Sponsors: Nemours Children's Clinic; National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Recruiting
- Exploration on the Relationship Between Distinct Sarcopenia, Traditional Chinese Medicine Body Constitution, and Circadian Rhythm Patterns of Older Adults and Impact of Acupoint-stimulated Interventionson July 20, 2026 at 4:00 am
Conditions: Sarcopenia; Sleep Wake Disorders Interventions: Behavioral: Sleep Hygiene Education; Other: Vivifrail Exercise Program Sponsors: Tainan Hospital, Ministry of Health and Welfare Recruiting
- Cereset Research Exploratory Studyon July 20, 2026 at 4:00 am
Conditions: Neurological Diseases or Conditions; Cardiovascular Conditions After Birth; Psychophysiologic Disorders Interventions: Device: Active CR Sponsors: Wake Forest University Health Sciences Recruiting
- The Sleep Clinic Outcome and Practice Studyon July 20, 2026 at 4:00 am
Conditions: Insomnia Disorder; Circadian Rhythm Sleep Disorder Interventions: Behavioral: Chronotherapy; Behavioral: Cognitive Behavioral Therapy for Insomnia Sponsors: St. Olavs Hospital Recruiting
- Central Sleep Apnea : Physiologic Mechanisms to Inform Treatmenton July 20, 2026 at 4:00 am
Conditions: Sleep Disordered Breathing; Able Bodied Interventions: Drug: Acetazolamide + supplemental oxygen + PAP therapy; Drug: Zolpidem + PAP therapy; Drug: Buspirone + PAP therapy Sponsors: VA Office of Research and Development Recruiting
- Comparing Acoustic Resonance Therapy (ART) vs. Cognitive Behavioral Therapy for Insomnia (CBT-I)on July 20, 2026 at 4:00 am
Conditions: Chronic Insomnia Disorder Interventions: Behavioral: Mayo Clinic Cognitive Behavioral Therapy for Insomnia (CBT-I); Device: Acoustic Resonance Therapy (ART) Sponsors: Mayo Clinic Recruiting
- Effectiveness of Audio Cues to Achieve Positional Therapy in Patients With Positional Obstructive Sleep Apneaon July 20, 2026 at 4:00 am
Conditions: Obstructive Sleep Apnea (OSA); Positional Obstructive Sleep Apnea Interventions: Device: Investigational Positional Therapy Device Sponsors: SleepDev, Inc Recruiting
- A Study of Eloralintide (LY3841136) in Participants With Obstructive Sleep Apnea and Obesity or Overweighton July 17, 2026 at 4:00 am
Conditions: Sleep Apnea, Obstructive; Obesity; Overweight Interventions: Drug: Eloralintide; Drug: Placebo Sponsors: Eli Lilly and Company Recruiting
- Sleep Disordered Breathing, Endothelial Function, and Adverse Events in Pregnancyon July 17, 2026 at 4:00 am
Conditions: Pregnancy Related; Sleep-Disordered Breathing Sponsors: University of Alberta Recruiting
- ISP-001: Sleeping Beauty Transposon-Engineered B Cells for MPS Ion July 17, 2026 at 4:00 am
Conditions: Mucopolysaccharidosis IH/S; Mucopolysaccharidosis IS Interventions: Biological: Autologous Plasmablasts (B cells) Sponsors: Immusoft of CA, Inc. Recruiting
- Mechanisms of Cannabidiol in Persons With MS: the Role of Sleep and Pain Phenotypeon July 17, 2026 at 4:00 am
Conditions: Multiple Sclerosis; Sleep; Pain Interventions: Drug: Cannabidiol (CBD); Drug: Tetrahydrocannabinol (THC); Drug: Placebo CBD; Drug: Placebo THC Sponsors: Tiffany J. Braley, MD, MS; National Center for Complementary and Integrative Health (NCCIH) Recruiting
- Foot Reflexology and Ta-VNS for Symptom Management in Head and Neck Cancer During CCRTon July 17, 2026 at 4:00 am
Conditions: Head and Neck Neoplasms; Chemoradiotherapy-Related Symptoms Interventions: Procedure: True Foot Reflexology; Procedure: Sham Foot Reflexology; Device: True ta-VNS; Device: Sham ta-VNS; Procedure: True Auricular Acupressure; Procedure: Sham Auricular Acupressure; Other: Usual Care Sponsors: Tzu Chi University; Buddhist Tzu Chi Medical 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