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12 papers
This 2017 review of studies up to 2014 looked at how cannabis and related drugs affect sleep. The authors found early, mixed evidence: cannabidiol (CBD) showed possible benefit for insomnia and some sleep disorders, THC might make people fall asleep faster but could harm sleep quality over time, and some…
This review combined results from 10 intervention studies to see if physical activity programs change cortisol (a stress hormone) and sleep in adults. The pooled results found lower cortisol after activity programs and some improvement in sleep quality. The authors say the evidence is moderate for cortisol and low for…
This study followed 1,356 apparently healthy, employed adults over about 18 months to see how burnout and insomnia change together. Using standard questionnaires, the researchers found that higher burnout predicted new cases of insomnia and higher insomnia predicted new cases of burnout, even after adjusting for depression and other factors.…
The researchers surveyed more than 550 adults in Romania with self-report questionnaires to study links between ADHD symptoms, sleep problems, and morning/evening preference. They found that people with probable ADHD more often had insomnia-type sleep problems (over 50%), slept less, took longer to fall asleep, and woke up more at…
This study looked at 152 moderate cannabis users (21–70 years old) to see what they expect cannabis will do for sleep and what their reported sleep was like. Users were more likely to expect cannabis to help sleep, but the study found few clear links between cannabis use and better…
Nightmare disorder and isolated sleep paralysis are REM-related sleep problems that can cause real distress. Nightmare disorder means repeated, very upsetting, well-remembered dreams that wake a person and hurt their mood, sleep, or daily life. Isolated sleep paralysis is a state where the body stays in REM sleep muscle paralysis…
This review explains that sleep problems are common in bipolar disorder and are tied to worse mood, more relapse, and more daily problems. The authors describe non-drug treatments for sleep, especially adapted cognitive behavioral therapy for insomnia (CBT-I), and note some evidence and limits for these approaches.
This article reviews studies and a patient case about how cannabis and related compounds affect sleep. The authors found that the research is limited and often small or observational. Overall, cannabis products seem to have little or no clear benefit for sleep disorders and can cause sleep problems for some…
This review looked at 34 studies that tested cannabidiol (CBD) for sleep problems. Some studies used mostly CBD and others used CBD with similar amounts of THC. Many studies reported that at least some participants had better sleep, but very few studies focused only on people with insomnia and most…
This study used data from 24,250 U.S. users of the WHOOP wearable (74.5% male, mean age 37.6 years) collected from May 1, 2020 to May 1, 2021. Compared to typical days, most U.S. public holidays, holiday eves, and Daylight Saving Time transitions showed clear changes: people tended to sleep longer,…
This small, retrospective chart review looked at patients who used medical cannabis for insomnia at a community pharmacy in Ottawa. Of 38 patients with enough follow-up, 27 (71%) said their sleep or related symptoms were better, and 15 (39%) reduced or stopped a prescription sleep medicine. Eight patients (21%) reported…
This online study surveyed 185 healthy, pain-free adults in Saudi Arabia between December 2024 and April 2025 using validated Arabic questionnaires for physical activity, sleep quality, and anxiety. On average participants reported 1730.02 MET·min/week of physical activity and 6.77 hours/day of sedentary time. The researchers found no significant links between…
