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Circadian Rhythms

All articles tagged with #circadian rhythms

A Narrow Eating Window Might Boost Brain Power in Older Adults
health28 days ago

A Narrow Eating Window Might Boost Brain Power in Older Adults

A small study of 47 overweight and obese women aged 50–79 found that eating all daily calories within a nine-hour window (roughly 10 a.m.–6 p.m.) led to similar weight loss as a 12-hour eating pattern, but participants in the time-restricted group showed better performance on cognitive tests of memory, attention, and problem-solving, suggesting meal timing and circadian alignment may help brain health in aging—though larger studies are needed to confirm the findings.

via New York Post|
#aging#circadian-rhythms#cognitive-health
A Cautionary Tale from America's 1970s Daylight Saving Experiment
politics1 month ago

A Cautionary Tale from America's 1970s Daylight Saving Experiment

During the 1973‑74 energy crisis, the U.S. briefly adopted year‑round daylight saving time, but widespread dissatisfaction and logistical issues led to a quick rollback. Sleep experts warn permanent standard time better aligns with human circadian rhythms, fueling ongoing debates over permanent DST, permanent standard, or hybrid compromises that require a clear national decision rather than piecemeal changes.

via The Dispatch|
#circadian-rhythms#daylight-saving#energy-policy
US Approves 60-Foot Orbital Mirror to Light Night Sky, Sparks Astronomical Backlash
technology1 month ago

US Approves 60-Foot Orbital Mirror to Light Night Sky, Sparks Astronomical Backlash

The US FCC has approved Reflect Orbital’s plan to launch Eärendil-1, a 60-foot square mirror satellite that will unfurl in orbit about 400 miles up to reflect sunlight onto a targeted three-mile-wide patch on Earth. Users could pay about $5,000 per hour for access, with a requirement of 1,000 annual hours, though the company also envisions a fleet of up to 1,000 much larger mirrors. While the tech could aid nighttime illumination for photographers or emergencies (and benefit solar farms at night), scientists warn it could drastically alter the night sky and disrupt circadian rhythms, animal migrations, plant cycles, and oceanic ecosystems.

via PetaPixel|
#astronomy#circadian-rhythms#light-pollution
Circadian Clock Therapies Boost Stroke Recovery by Enhancing Brain Waste Clearance in Mice
science1 month ago

Circadian Clock Therapies Boost Stroke Recovery by Enhancing Brain Waste Clearance in Mice

A study in mice found that strengthening circadian rhythms through light exposure, melatonin, the clock-targeting drug KL001, or time-restricted feeding improved glymphatic brain clearance and lowered inflammatory molecules after stroke, even when therapy began three days later, suggesting circadian-based rehab could aid recovery pending human trials.

via SciTechDaily|
#circadian-rhythms#glymphatic-system#inflammation
Three-Hour Meal Gap Promises Better Sleep and Health
health5 months ago

Three-Hour Meal Gap Promises Better Sleep and Health

A Northwestern clinical trial found that keeping a last meal about three hours before bedtime improved circadian rhythms, blood pressure, heart rate, and blood sugar, suggesting that when you eat may be as important as what you eat for sleep. Saturated fats near bedtime hinder melatonin production, and ultra-processed diets are linked to worse sleep. Tryptophan-rich foods help melatonin formation, especially when paired with complex carbs, magnesium, B vitamins, and zinc. Rather than chasing a single 'miracle' food, overall dietary patterns—such as Mediterranean or DASH diets—can reduce insomnia risk, and a comforting bedtime ritual may also aid sleep.

via Boing Boing|
#circadian-rhythms#diet-patterns#health
Meal timing fails to improve sleep, large TRE study finds
lifestyle7 months ago

Meal timing fails to improve sleep, large TRE study finds

A 12-week trial of nearly 200 adults with overweight/obesity compared early, late, and flexible daily eating windows. Sleep duration, sleep quality, and mood were similar across all groups; the only notable difference was about 12 minutes more total sleep for early TRE vs usual care. The findings suggest that shifting dinner time alone is unlikely to meaningfully boost sleep, and practical decisions should be guided by personal schedules and hunger patterns rather than expecting a sleep payoff.

via Earth.com|
#circadian-rhythms#lifestyle#mood
Timing meals won’t fix sleep, large TRE study finds
lifestyle7 months ago

Timing meals won’t fix sleep, large TRE study finds

A 12-week trial in nearly 200 adults with overweight/obesity compared early, late, and self-selected eating windows (time-restricted eating). Sleep duration, efficiency, awakenings, mood, and overall well-being were similar across all groups; only the early-window group showed a small ~12-minute increase in total sleep time versus usual care. The findings suggest that simply moving dinner earlier or later does not meaningfully improve sleep, though time-restricted eating can aid weight management. Results apply to adults 30–60 without serious sleep problems, and limitations include mild baseline sleep issues, unadjusted chronotype, caffeine use, and potential industry ties. Future research with polysomnography and diverse populations is needed.

via Earth.com|
#circadian-rhythms#lifestyle#meal-timing
Sleep Irregularities Linked to 172 Diseases in a Major UK Biobank Study
health7 months ago

Sleep Irregularities Linked to 172 Diseases in a Major UK Biobank Study

A June 2025–based observational analysis of over 88,000 UK Biobank participants found disrupted sleep patterns—irregular bedtimes, fragmented sleep, and unstable rhythms—are associated with a higher risk of 172 diseases across metabolic, neurological, cardiovascular and respiratory systems. Experts caution that correlation does not prove causation, but point to mechanisms like circadian misalignment and impaired immune/metabolic function; improving sleep through consistent routines, limiting late-night screens and caffeine, managing light exposure, and CBT-I are suggested avenues for better health.

via HuffPost|
#chronic-disease#circadian-rhythms#health
Unraveling the Insomnia Puzzle: How Circadian Disruption Keeps the Brain Awake
health8 months ago

Unraveling the Insomnia Puzzle: How Circadian Disruption Keeps the Brain Awake

New research indicates that chronic insomnia may be caused by a disruption in the body's internal clock, leading to a flattened circadian rhythm of mental activity and delayed peak alertness, which keeps the brain in a heightened state of alertness at night. The study suggests that targeting the circadian system could offer new treatment avenues for insomnia.

via PsyPost|
#biological-clock#circadian-rhythms#health