Tag

Circadian Rhythm

All articles tagged with #circadian rhythm

space4 days 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-being6 days 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

space6 days 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

health10 days 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

health11 days 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

environment20 days 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

wellness22 days 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

health27 days 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

health27 days ago•5 min saved

Early Breakfast and Longer Overnight Fast Linked to Lower BMI

A study of more than 7,000 adults followed over five years found that eating breakfast around 7:30 a.m. and keeping about a 10.5-hour gap between the last bite of dinner and breakfast the next day were associated with a lower BMI, suggesting that front-loading calories earlier in the day and avoiding late-night eating may support weight management; the approach is described as flexible timing rather than strict intermittent fasting.

via Women's Health|

#bmi #breakfast #circadian-rhythm

health28 days ago•7 min saved

Morning Naps Could Flag Hidden Health Problems in Seniors

A long-term study of 1,338 older adults found that longer daytime naps, more frequent naps, and morning naps were linked to higher all-cause mortality. Each extra hour of napping per day correlated with about a 13% greater death risk, each additional nap per day with ~7% more risk, and morning nappers had roughly 30% higher risk than afternoon nappers. While the findings show correlation, not causation, they suggest nap patterns may reflect underlying disease or circadian disruption and could be used via wearable monitoring to detect health issues earlier.

via SciTechDaily|

#aging #circadian-rhythm #health

science29 days ago•6 min saved

Cyclops-Like Ancestor Illuminates Vertebrate Eye Evolution and Sleep

Researchers trace vertebrate vision to a 600-million-year-old median eye on a worm-like ancestor, which evolved into the brain’s pineal gland and the sleep-regulating melatonin system, explaining why vertebrate eyes are brain-derived and how image-forming vision and circadian rhythms emerged as lineages shifted to more active lifestyles.

via Science Daily|

#circadian-rhythm #evolution #eye

wellness29 days ago•4 min saved

Your Sleep, Your Schedule: Mastering Evening Exercise Timing

There isn’t a universal best time to exercise before bed: intense workouts can keep you awake and reduce sleep quality, while gentler activity late at night is often fine; daytime exercise helps sleep via anxiety reduction and melatonin, and training your internal clock with a consistent routine (Zeitgebers) is key. Tailor your timing to how your body responds and aim for regularity rather than a one-size-fits-all rule.

via GQ|

#bedtime #circadian-rhythm #consistency

health1 month ago•2 min saved

Ditch These 4 Late-Night Habits to Protect Your Heart

Experts say evening habits drive cardiovascular health: after 7 p.m. avoid late-night snacks, intense workouts, alcohol, and stressful TV or conversations so your body can wind down and your heart can recover during sleep. Nighttime digestion and elevated cortisol disrupt overnight repair, affecting blood pressure and metabolism; opt for light activity like walking or gentle yoga, minimize screens, and aim for 7–9 hours of sleep to support heart health.

via TODAY.com|

#cardiology #circadian-rhythm #health

health1 month ago•263 min saved

Regular Bedtimes Linked to Half the Heart Disease Risk, Study Finds

A Finnish study of 3,231 adults followed for 10 years found that irregular bedtimes doubled the risk of heart attacks, strokes, heart failure, or cardiovascular death, especially among those sleeping less than eight hours; wake times didn’t have the same effect. Experts say keeping a consistent bedtime supports the body's circadian clock, and recommend a fixed sleep window (ideally 7–8 hours) with a wind‑down routine. The American Heart Association now recognizes sleep regularity as a key heart-health factor, and treating sleep disorders is advised if sleep is persistently troubled.

via AOL.com|

#bedtime-consistency #circadian-rhythm #health

health1 month ago•7 min saved

Sync workouts with your body clock to boost heart-health benefits

A randomized 12-week trial in Pakistan found that exercising in line with participants’ natural morning or evening preferences (chronotype) produced greater heart-health benefits than misaligned timing, including a larger drop in systolic blood pressure (about 11 vs 5.5 mmHg), greater reductions in LDL cholesterol (13.7 vs 7.6 mg/dL), and improvements in heart-rate variability, glucose, sleep quality, and exercise capacity, though benefits were most pronounced for those with higher baseline BP; limitations include a small, short-duration sample and limited generalizability, so more research is needed before broad recommendations.

via Medical News Today|

#blood-pressure #cardiovascular-health #chronotype