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.
- A Modified Baveno Classification of Obstructive Sleep Apnoea Based on Sleepiness and Cardiovascular Scoreson December 12, 2025 at 5:00 am
Conditions: Obstructive Sleep Apnea (OSA) Sponsors: Wissenschaftliches Institut Bethanien e.V Recruiting
- High Intensity Interval Training (HIIT) to Reduce Frailty and Enhance Resilience in Older Veteranson December 12, 2025 at 5:00 am
Conditions: Frailty Interventions: Behavioral: Center based attention (stretching only) control; Behavioral: Center based HIIT; Behavioral: Home based HIIT Sponsors: VA Office of Research and Development Recruiting
- Culturally Adapted i-CBT for Farsi/Dari Speaking Migrantson December 12, 2025 at 5:00 am
Conditions: Depressive Symptoms; Anxiety Symptoms; Grief; Psychological Trauma; Insomnia; Resilience; Stress; Psychological Well Being; Marital Relationship; Wellbeing; Common Mental Health Problems; Rumination Interventions: Behavioral: Culturally adapted i-CBT Sponsors: Karolinska Institutet; Linkoeping University Recruiting
- Power Nap With TES-TIon December 12, 2025 at 5:00 am
Conditions: Non-restorative Sleep; Healthy Volunteer Interventions: Device: Transcranial electrical stimulation with Temporal Interference (TES-TI) Sponsors: University of Wisconsin, Madison; Corundum Convergence Institute Recruiting
- Mindfulness Meditation for Insomniaon December 11, 2025 at 5:00 am
Conditions: Sleep Initiation and Maintenance Disorders; Insomnia; Insomnia Chronic; Mindfulness; Telemedicine Interventions: Behavioral: Instructed bedtime app-guided mindfulness meditation; Behavioral: Uninstructed app-guided mindfulness meditation; Behavioral: Sleep hygiene education Sponsors: Brigham and Women's Hospital; National Center for Complementary and Integrative Health (NCCIH) Recruiting
- Effect of CPAP Treatment in Patients With Severe Uncontrolled Asthma: The ASTHMA-SLEEP Trialon December 11, 2025 at 5:00 am
Conditions: Obstructive Sleep Apnea; Asthma Interventions: Device: CPAP treatment; Other: Hygienic and dietary advice Sponsors: Hospital Clinic of Barcelona Recruiting
- A Study of Suvorexant (MK-4305) for the Treatment of Insomnia Disorder in Participants With Opioid Use Disorder (MK-4305-098)on December 11, 2025 at 5:00 am
Conditions: Insomnia Interventions: Drug: Suvorexant; Drug: Placebo Sponsors: Merck Sharp & Dohme LLC Recruiting
- Study of Sleep Inertia in Major Depressive Disorder by the Psychomotor Vigilance Taskon December 11, 2025 at 5:00 am
Conditions: Major Depression; Sleep Inertia Interventions: Other: Psychomotor vigilance task; Other: Video-polysomnography; Other: Sleep and activity monitoring Sponsors: Centre Hospitalier Universitaire de Nīmes Recruiting
- A Mobile App to Improve 24-Hour Movement Guideline Adherence in Preschoolerson December 11, 2025 at 5:00 am
Conditions: Healthy; 24-Hour Movement Guidelines; Feasibility Studies; Sleep; Physical Activity; Screen Time; Sedentary Behaviors; Motor Skills; Cognition; Parent-Child Relations; Mobile Application; Health Education; Child Development Interventions: Behavioral: Shining Star mHealth App Sponsors: University of Kansas Medical Center; Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) Recruiting
- The Iowa ACEs and Sleep Cohort and Manipulating Sleep in Young Adults With ACEs Studieson December 11, 2025 at 5:00 am
Conditions: Adverse Childhood Experiences; Vascular Dilatation; Sleep; Sleep Disturbance; Psychosocial Stressor; Psychological Trauma; Endothelial Dysfunction; Inflammation; Oxidative Stress Interventions: Behavioral: Cognitive Behavioral Therapy for Insomnia (CBT-i) Sponsors: Nathaniel Jenkins Recruiting
- Clinical Characteristics and Molecular Mechanism of Patients With Obstructive Sleep Apneaon December 11, 2025 at 5:00 am
Conditions: Obstructive Sleep Apnea Sponsors: Capital Medical University Recruiting
- Conservative Treatment in Patients With Supraspinatus Tendon Injury.on December 10, 2025 at 5:00 am
Conditions: Supraspinatus Injury; Sleep Disturbance Interventions: Drug: 1ml of Depo-Medrol® injection; Other: Rehabilitation; Drug: Nerve block with 4ml of 2% lidocaine; Drug: Tropocells® PRP injection Sponsors: Medical University of Lodz 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