A new study has found that a 400 mg caffeine dose disrupts sleep up to 12 hours before bedtime, yet many people fail to notice these disruptions, especially when consumed earlier in the day.

Abstract. In today’s 24-h society, chronic sleep disruption and circadian misalignment have led to a “global sleep crisis,” increasing the risk of cognitiv

Dr. Stacey Simon honored for contributions to sleep medicine

Board chair and health staff summarized recent reviews linking artificial light at night (ALAN) to circadian disruption and associations with cardiovascular, metabolic and neurological conditions; they emphasized associations rather than proven causation and recommended evidence‑based ordinance elements.

Being on-call for work, where you must remain reachable and ready to act at short notice, often disrupts sleep. Research shows that merely knowing you might be called in is enough to cause sleep disturbances, even if the call never comes. This uncertainty creates anxiety, leading to poor sleep quality. Sleep is crucial for cognitive function, emotional regulation, and physical health, yet on-call workers frequently sacrifice it due to irregular schedules and work demands. Employers can mitigate these effects by designing flexible rosters that allow adequate recovery time between shifts. Individuals can also prioritize sleep hygiene by maintaining a cool, dark bedroom environment and avoiding stimulants before bed. The article emphasizes the need for better workplace practices to support on-call workers' health and well-being, highlighting the broader implications of poor sleep on daily life and long-term health outcomes.

Heatwaves are occurring more frequently and are known to affect particularly night-time temperatures. We review here literature on how night-time ambient temperature changes affect body temperature an...

Turning clocks back an hour disrupts our body’s natural rhythms of melatonin, temperature, and cortisol, throwing sleep, mood, and energy out of sync for days.

News about MSI Press authors; Excerpts from MSI Press authors' books; Carl's Cancer Compendium information; tips for authors

Background: Although accelerometers are present in popular consumer wearable devices, to our knowledge, no prior study has demonstrated the feasibility and acceptability of accessing sufficient consumer wearable accelerometer data to compute 24-hour sleep/wake rhythm measures. Unlocking these data has the potential to support a new generation of studies with real-world implications (e.g., screening for the 24-hour sleep-wake risk factors established in research). Objective: We aimed to: (a) establish the feasibility of characterizing 24-hour sleep/wake rhythm measures using accelerometer data gathered from the Apple Watch in older adults with and without Mild Cognitive Impairment; and (b) examine correlations of these sleep/wake rhythm measures with neuropsychological test performance. Methods: Of 40 adults enrolled (mean age=67.2, standard deviation (SD)=8.4; 72.5% female), 19 had MCI and 21 had no cognitive disorder (NCD). Participants were provided devices, oriented to the study software (myRhythmWatch or myRW), and asked to use the system for a week. The primary feasibility outcome was whether participants collected enough data to assess 24-hour sleep/wake rhythm measures (i.e., ≥3 valid contiguous days). We extracted standard nonparametric and extended-cosine based sleep/wake rhythm metrics. Neuropsychological tests gauged immediate and delayed memory (Hopkins Verbal Learning Test) as well as processing speed and set-shifting (Oral Trails Parts A and B). Results: Using the Apple Watch-based myRW system to gather raw accelerometer data is feasible in older adults with and without MCI. Sleep/wake rhythms variables generated from this system correlated with cognitive function, suggesting future studies can use this approach to evaluate novel, scalable, risk factor characterization and targeted therapy approaches. Conclusions: Using the Apple Watch-based myRW system to gather raw accelerometer data is feasible in older adults with and without MCI. Sleep/wake rhythms variables generated from this system correlated with cognitive function, suggesting future studies can use this approach to evaluate novel, scalable, risk factor characterization and targeted therapy approaches.

YouTube video by HealthDay

Lawmakers debated HB 11-49, a proposal to stop switching clocks and adopt year‑round standard time only after neighboring states act or Congress changes federal law. Broadcasters warned of commerce disruption; medical experts urged permanent standard time for circadian and public‑health benefits.

Loneliness, not screen time, is a stronger predictor of insomnia among college students. Addressing loneliness could improve sleep quality