Topic
Circadian Rhythm
The body's internal 24-hour clock that regulates sleep-wake cycles, hormone release, and metabolism.
Deep Research Articles
Bad Sleep Habits Could Be Damaging Your Lungs — New 2026 Study of 12,000 People
A 7-year study of 12,000+ people found that 'circadian syndrome' — a cluster of sleep and metabolic problems — increases lung disease risk by up to 53%.
Your Boss's Last-Minute Schedule Change Is Giving You Insomnia — 2026 Data From 20,000 Workers
A 2026 study of 20,000 Korean workers found unpredictable schedules double insomnia risk. Here's what the data means for shift workers everywhere.
Your Body Clock Might Be Driving Parkinson's Disease — Here's What a 2026 Review Found
A 2026 review in npj Parkinson's Disease links circadian disruption to Parkinson's progression. Learn how your body clock affects the disease and what chronotherapy could do.
How Body Temperature Controls Your Sleep: A Science-Based Guide from Hot Baths to Room Temperature
Synthesizing the 2026 Journal of Clinical Medicine comprehensive review and multiple studies, this deep dive explores the physiological connection between thermoregulation and sleep — why hot baths help, the ideal room temperature, thermoregulatory dysfunction in insomnia, and three most effective temperature-based interventions.
How Poor Sleep Accelerates Cognitive Decline: Evidence From 3 Major 2026 Studies
Three landmark 2026 studies — a 13-year CHARLS cohort of 8,900 adults, a PNAS nap/memory experiment, and a Nature Neuroscience GABA/spindle trial — converge on a clear warning: poor sleep doesn't just feel bad, it measurably accelerates cognitive aging.
Beyond Sleep: How Circadian Rhythm Disruption Drives Cancer Progression
Two new studies reveal how circadian rhythm disruption promotes breast cancer and liver cancer progression through molecular mechanisms involving BMAL1, CLOCK, PER3, and lncRNA AC019080.1.
Research Feed
How Tired Are Night-Shift Nurses? A Ghana Study Puts a Number on It
A 2026 Scientific Reports study of 175 pediatric nurses in Ghana found that 20.6% experienced severe excessive daytime sleepiness after night shifts, with sleep disturbances, GI issues, and cardiovascular strain as the most common physiological complaints.
Slower Brain Waves During REM Sleep May Signal Early Alzheimer's Changes
A 2026 Molecular Psychiatry study found that REM sleep EEG slowing is significantly associated with cholinergic denervation in brain regions targeted early by Alzheimer's disease, suggesting it could serve as a potential early biomarker.
Can Weekend Sleep-Ins Cause Worse Eyesight in Teens? 2026
New research shows social jet lag from irregular teen sleep schedules worsens eyesight risk. Learn how sleep consistency may protect your child's vision.
How Eye Movements During Sleep Expose Your Body Clock (2026)
Eye movements during sleep reveal hidden micro-states organized by your body clock. Learn what this 2026 discovery means for deep sleep quality.
Shift Work Increases Sleep Disturbance Risk by 58%: Systematic Review of 21,677 People
A 2026 systematic review and meta-analysis in BMC Public Health (22 studies, 21,677 participants from 8 countries) found that shift workers have a 58% higher risk of sleep disturbances compared to regular day workers, with night shifts and rotating shifts posing the highest risk.
Chronotype-Aligned Exercise Timing Improves Cardiometabolic and Sleep Outcomes: 12-Week RCT
A 12-week RCT published in Open Heart found that aligning exercise timing with individual chronotype (morning/evening type) significantly improves blood pressure, sleep quality, and heart rate variability compared to misaligned exercise timing.
Amber Glasses in the Evening Shift Your Circadian Clock: A Three-Arm RCT
A JAMA Internal Medicine RCT found that wearing amber glasses from 6-9 PM advanced melatonin onset by 45 minutes and improved sleep latency by 12 minutes.
Optimal Melatonin Timing Depends on Your Chronotype
A new study reveals that melatonin's ideal dose and timing vary significantly by chronotype: night owls need 3mg at 2h before bed, early birds respond to 0.5mg at 1h before bed.
Poor Sleep Quality Independently Predicts Elevated Cardiovascular Inflammatory Markers
A large-scale longitudinal study of 8,204 adults finds that poor sleep continuity, not just short sleep duration, is independently associated with elevated hs-CRP, IL-6, and fibrinogen levels over a 5-year period.
Low-Dose Melatonin Improves Climacteric Symptoms and Sleep in Female Shift Workers: Randomized Controlled Trial
A 2026 RCT in Journal of Pineal Research found that low-dose melatonin (3mg/day for 12 weeks) significantly improved climacteric symptom scores (Kupperman index -38%), sleep efficiency (+9.2%), and mood in female shift workers, with good safety profile.