Tag

Circadian Rhythm

All articles tagged with #circadian rhythm

health11 days ago•4 min saved

Steady Bedtimes May Shield Hearts After 40

A 10-year study of 3,231 adults started at age 46 found that people aged 40–60 with irregular bedtimes and less than 8 hours of sleep nightly had about double the risk of major heart events (such as stroke, heart failure, or cardiac-related death) compared with those with consistent bedtimes. Wake-time variability didn’t affect risk. The findings highlight the circadian rhythm’s role in heart health and support regular bedtimes and good sleep hygiene: wind down for at least an hour before bed, avoid caffeine and screens, and keep a dark, quiet sleep environment; if you can’t sleep, leave the bed and engage in a calm activity until drowsy.

via Men's Health|

#bedtime #circadian-rhythm #health

health12 days ago•16 min saved

Sunsets as daily health hacks: awe boosts memory, mood and sleep

Watching sunsets (and sunrises) can trigger awe, shifting perspective away from daily worries, boosting mood and memory, and supporting circadian cues that improve sleep. Regular exposure to awe-inspiring natural scenes may also reduce stress and inflammation and even foster prosocial behaviour, making sunsets a simple, daily wellness tool.

via BBC|

#awe #circadian-rhythm #health

health18 days ago•11 min saved

Seven Sleep-Boosting Habits From a Neuroscience Expert

Dr. Matthew Walker outlines seven practical habits to improve sleep: set a to‑bed alarm to protect bedtime, do a nightly digital detox, minimize junk light in a darkened environment, keep a consistent wake time even on weekends, expose yourself to morning daylight, and use a warm-to-cool temperature sequence (warm hands/feet or a hot bath followed by a cool room) to trigger the body’s descent into sleep. These practices reinforce the circadian rhythm, boost melatonin signaling, and support deeper, higher‑quality rest.

via GQ|

#bedtime-routine #circadian-rhythm #digital-detox

health23 days ago•11 min saved

A 62-ingredient AM/PM system aims to fix what ails the supplement industry

The piece argues many supplements underperform due to under-absorption, poor ingredient forms, and cluttered routines, and highlights Phos Performance’s system-based approach: a morning/evening AM/PM program with 62 disclosed ingredients, chelated minerals, methylated B vitamins, and delivery methods designed for better uptake. The system emphasizes nutrient synergy, COA/testing, and real-world validation with athletes to promote sustainable, everyday results.

via KSL.com|

#absorption #circadian-rhythm #health

space1 month ago•10 min saved

Sixteen Sunrises in a 90-Minute Orbit: How the ISS Keeps Time in Space

The ISS orbits Earth roughly every 92 minutes at about 28,000 km/h, completing around 15–16 orbits per day. From the cupola, crew see about sixteen sunrises and sunsets daily, but that cycle is a window view, not a crew day; onboard time runs on UTC and is supported by LED lighting to align sleep and wakefulness. During high-beta-angle periods the station can stay in sunlight for days, so the “sixteen sunrises” figure is an average, not a constant.

via Space Daily|

#circadian-rhythm #iss #orbit

science1 month ago•5 min saved

Night Shifts Subtly Shrink Brain Regions, But Reversals Occur After Stopping

A large UK Biobank MRI study found that among 2,122 shift workers, there is a modest, symmetrical loss of brain volume in the right thalamus and left amygdala (areas tied to sleep regulation, emotion, and memory) with associated white‑matter changes. The negative association with cognitive performance is small, and the researchers caution interpretation. Importantly, ceasing shift work was linked to partial recovery of brain volume within about 2.5 years, suggesting a potential reversible window, though the study focused on older adults and applicability to younger workers remains uncertain.

via ScienceAlert|

#amygdala #brain-volume #circadian-rhythm

lifestyle1 month ago•30 min saved

Nighttime meals disrupt hormones, sleep, and weight, nutritionist says

A nutritionist explains that regularly eating large meals close to bedtime can disrupt the circadian rhythm, impair insulin sensitivity, and reduce sleep quality, potentially complicating long‑term weight management. However, outcomes depend on total calories, food quality, sleep, stress, and activity, so a sustainable approach is to eat a balanced dinner a few hours before bed and avoid fear‑based rules.

via Hindustan Times|

#circadian-rhythm #insulin-sensitivity #late-night-snacking

space1 month ago•14 min saved

Orbiting Time: Sleep, Faith, and Birthdays on the ISS

Crew aboard the International Space Station experience about 16 sunrises and 16 sunsets each day and run their schedule on Coordinated Universal Time, aided by LED lighting that mimics day-night cues. Private sleep stations, strict light rules, and pharmacological aids aim to protect performance, while religious practices adapt to orbital life (e.g., praying toward launch-site time or Mecca when possible). Birthdays and other rituals help maintain a sense of meaning in microgravity. The piece emphasizes that, despite technology, humans rely on time-keeping structures—day, week, prayer, and cake—to stay oriented, and that chronic circadian disruption could pose health risks for long-duration missions.

via Space Daily|

#birthdays #circadian-rhythm #iss

well-being1 month ago•18 min saved

Science-backed tips to fall asleep faster

Experts share science-backed strategies to fall asleep faster and improve sleep quality, noting that many people fall short of the recommended seven to nine hours due to sleep disorders, anxiety, caffeine, and daytime distractions; practical tips include reducing caffeine and screen time before bed, keeping a consistent sleep schedule, creating a sleep-friendly environment, and addressing underlying stress or health issues.

via The Washington Post|

#anxiety #circadian-rhythm #sleep

space1 month ago•14 min saved

Living on Mars time: NASA engineers bend their days to a 24h39m sol

Two NASA rovers, Curiosity and Perseverance, run on a Martian day of 24 hours 39 minutes, so JPL staff spend about 90 sols living on Mars time, shifting their wake/sleep cycles and meals to align with Martian sunrise. Because of the signal delay, commands are scripted for the next sol rather than realtime control, and coping measures like blue-light lighting, blackout curtains, and timed caffeine help manage sleep loss and social dislocation. After the commissioning phase, teams gradually revert to Earth time, aided by increased rover autonomy (Mars Global Localization) that reduces the need for humans to chase Martian dawn.

via Space Daily|

#circadian-rhythm #curiosity #mars

health1 month ago•8 min saved

Align Your Workout With Your Body Clock for Bigger Health Gains

A randomized controlled trial found that scheduling exercise to fit an individual's chronotype—morning types at 8–11am, evening types at 6–9pm—improved blood pressure, aerobic fitness, blood glucose, cholesterol and sleep in people at risk of cardiovascular disease, compared with workouts at the opposite time; even when misaligned, exercise offers benefits, and intermediate chronotypes may be less sensitive to timing. Other factors like afternoon body temperature peaks and sleep pressure also shape performance, so while timing can help, regular activity and good sleep remain fundamental.

via ScienceAlert|

#cardiovascular-health #chronotype #circadian-rhythm

health1 month ago•7 min saved

Your Colon Has Its Own Clock, Explaining Morning Urges

Scientists found clock genes in the colon’s nerve tissue that regulate bowel movements on a daily rhythm, with nitric oxide acting as a braking signal that loosens as wake time approaches. The resulting surge in colonic activity occurs after waking and after meals due to the gastrocolic reflex, cortisol, and meal-triggered signals. Disrupting this rhythm with shift work or travel is linked to IBS-like symptoms, while practical guidance—consistent wake time, morning light, a short post-breakfast toilet routine, fiber, water, and light activity—helps the colon finish the job.

via Indian Defence Review|

#circadian-rhythm #gastrocolic-reflex #gastroenterology

environment2 months ago•3 min saved

Global Night Sky Brightens as Artificial Light Expands by 16%

A Nature study using satellite imagery finds artificial nighttime lights increased worldwide by about 16% from 2014 to 2022, with the United States having the highest total luminosity in 2022 and regional variations driven by conflict and disasters (notably Europe dimming during the Russia–Ukraine energy crisis). The rise in light pollution affects wildlife by disrupting sleep, navigation, and feeding, and can disrupt human circadian rhythms; the issue is reversible and individual actions—such as dimming outdoor lighting and using shields—can help, with tools like the Light Pollution Map and DarkSky resources available for guidance.

via USA Today|

#artificial-lighting #circadian-rhythm #environment

wellness2 months ago•6 min saved

Consistency Wins: Pick the Workout Time You’ll Actually Stick To

Experts say there isn’t a universal best time to work out. Morning sessions can boost alertness, mood, and cortisol regulation, helping establish a routine, while evening workouts may enhance strength, performance, and stress relief, with potential fat-burning benefits for some. The main takeaway is consistency: the time of day matters far less than how often and how well you train. If you prefer midday sessions or a specific schedule, those can work too. Avoid exercising too close to bedtime if you’re sensitive to sleep disruption.

via GQ|

#circadian-rhythm #evening-workout #fitness

health2 months ago•4 min saved

Harvard-backed finding: charging a phone at night can throw off sleep and aging signals

A Harvard-linked view says even a dim phone light near the bed can suppress melatonin, shift circadian timing, and reduce REM and deep sleep, delaying the body’s nightly repair and nudging aging-related processes. Over time, this circadian misalignment is linked to metabolic strain and poorer cognitive recovery. Practical fixes include moving the charger out of the bedroom, enabling Do Not Disturb and minimizing notifications, using dim red-shifted or amber lighting, and maintaining a consistent day–night schedule with bright morning light and gradually dimmer evenings.

via Iowa Park Leader|

#aging #blue-light #circadian-rhythm