Circadian Rhythm

Circadian Rhythm is the regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, feeding, etc. This rhythm seems to be set by a 'biological clock' which seems to be set by recurring daylight and darkness.

How Does the Suprachiasmatic Nucleus (SCN) Control Circadian Rhythm?

Circadian rhythms are biological cycles within organisms that allow them to adjust their physiology and behavior to anticipate and adapt to changes in the outside environment. Circadian rhythms are maintained with the help of circadian clocks, the main circadian clock in mammals is the suprachiasmatic nucleus (SCN).

What is the Circadian Rhythm?

Circadian Rhythm and Weight Loss

Artificial Light Exposure and Circadian Rhythm

Circadian Rhythm Length Variations - Early Birds and Night Owls

Circadian Rhythm Sleep Disorders

Social Jetlag and Sleep

How Does Airplane Travel Affect the Human Body?

The Circadian Rhythm and the Immune System

Memory Recall and Circadian Rhythm

Chronobiology: Why Time Matters in Medicine

Latest Circadian Rhythm News and Research

The science of when you should exercise to beat obesity

A new paper in Obesity explores the diurnal relationship of obesity to MVPA – at what time does MVPA pay off the most in preventing obesity?

25 Sep 2023

Renowned experts comprehensively review how climate change occurs and increases risk of cardiovascular disease

There is already robust evidence that people living with cardiovascular disease are disproportionately affected by poor air quality and extreme temperatures, in large part due to climate change, the greatest threat to human health of the 21st century.

21 Sep 2023

Is your body clock the secret to peak athletic performance?

Review comprehensively explores how the circadian rhythm impacts sports performance, hormonal regulation, and immune system function in athletes. The study emphasizes the optimal times of day for athletic performance and underlines the role of circadian rhythm in hormonal balance and immune responses.

7 Sep 2023

Research reveals 71% of men in the UK are struggling to sleep through the night

New research, from men’s healthcare company Numan, suggests there is a sleep crisis among UK men with 71% of men surveyed struggling to sleep through the night.

4 Sep 2023

Time-restricted feeding reverses Alzheimer's symptoms in mice, offers new hope for accessible treatment

Researchers explore the therapeutic potential of circadian-modulating interventions to treat Alzheimer’s disease.

27 Aug 2023

Review explores relationship between sleep disorders and pregnancy

A recent review summarizes what is known about these conditions and suggests future research directions and opportunities.

23 Aug 2023

Are irregular sleep patterns associated with increased mortality risk?

Researchers examined whether sleep regularity is associated with an increased risk of all-cause, cardiovascular disease (CVD), and cancer mortality.

22 Aug 2023

Time-restricted feeding may correct the circadian disruptions in Alzheimer's disease

One of the hallmarks of Alzheimer's disease is disruption to the body's circadian rhythm, the internal biological clock that regulates many of our physiological processes.

21 Aug 2023

Sleep dysfunction is underreported and underrecognized in Huntington's disease

A good night's sleep is essential for everyone. In individuals with Huntington’s disease (HD), sleep disturbances constitute an additional burden that may exacerbate disease outcomes and impact patients’ quality of life.

21 Aug 2023

Understanding how the body regulates circadian rhythms using mathematical models

Researchers are using mathematical models to better understand the effects of disruptions like daylight savings time, working night shifts, jet lag or even late-night phone scrolling on the body's circadian rhythms.

18 Aug 2023

Can light exposure behaviors predict chronotype, sleep quality, mood, memory, and concentration?

Researchers aimed to understand the influences of Light Exposure Behavior Assessment (LEBA) categories on chronotype, mood, sleep quality, memory, and concentration.

3 Aug 2023

Pennington Biomedical researcher wins NIH grant to study health effects of limited sleep and extended calorie intake

While we typically wouldn't give a second thought to that midnight snack, a shortened sleep cycle and the resulting extended eating duration can contribute to higher cardiovascular risk.

31 Jul 2023

$3 million grant to study how sleep and circadian rhythm affect chronic pain

Can poor sleep and circadian rhythm make chronic pain conditions worse? Edson College Assistant Professor Chung Jung Mun plans to find out through an innovative longitudinal study.

24 Jul 2023

How shift work and other types of unconventional work affects the gut microbiome

Researchers review different studies analyzing the impact of unconventional work on worker’s health and gut microbiota.

13 Jul 2023

Study identifies a signature of risk for developing hypomania

Mania, in which mood and energy level are extremely elevated for at least a week, and hypomania, which is less severe and lasts at least four days, are the defining features of bipolar spectrum disorders (BSD) and can be the most disruptive symptoms.

11 Jul 2023

Timing, type, and frequency of exercise are crucial components for optimal glycemic control in type 2 diabetes

Exercise plays a crucial role in managing type 2 diabetes, offering potential benefits such as improved glycemic control. This study explores exercise recommendations and their impact on dietary, medication, and behavioral factors for optimal diabetes care.

5 Jul 2023

New regulatory system discovered in malaria parasite

Gene expression within the apicoplast, an organelle in the malaria parasite Plasmodium falciparum, is regulated by melatonin (the circadian signaling hormone) in host blood, and intrinsic parasite cues, via a factor called ApSigma, as identified by a recent study aided by Tokyo Tech's World Research Hub Initiative.

3 Jul 2023

Wearable tech reveals: Social constructs and physical activity shape global sleep patterns

Researchers analyze sleep data from wearable devices to assess sleep patterns. Societal factors influence sleep quality and quantity, with exercise playing a positive role. Understanding social norms can help enhance the benefits of sleep on health and well-being.

19 Jun 2023

Parasite-host "coupling" mechanism could lead to new treatments for malaria

Transmitted through infected mosquitos, the malaria parasite, once in the human bloodstream, synchronously ruptures red blood cells and rapidly infects new red blood cells, beginning the cycle anew.

7 Jun 2023

Serious heart attacks more likely to happen on a Monday

Serious heart attacks are more likely to happen at the start of the working week than at any other time, according to new research presented today at the British Cardiovascular Society conference in Manchester.

4 Jun 2023

Circadian Rhythm

Overview

What is the Circadian Rhythm?

Circadian Rhythm and Weight Loss

Artificial Light Exposure and Circadian Rhythm