Category: Circadian Rhythm Sleep Cycles

Circadian rhythms are repeating changes in the body that follow an approximately 24-hour cycle. They help coordinate when you feel alert or sleepy and influence many other functions, including mood, appetite, hormone activity, digestion, and daily energy levels. Your circadian system is not simply a response to the clock on the wall. It is an […]

Your internal clock helps organise the body’s daily pattern of sleep, alertness, hormone activity, temperature, and metabolism. This timing system is commonly called the circadian rhythm. The word refers to a cycle that lasts “about a day”: close to 24 hours, although the precise timing can vary from person to person. Understanding your internal clock […]

Sleep is influenced by two connected systems: the body’s internal clock, which helps determine when you feel awake or sleepy, and the repeating stages of sleep, which shape what happens after you fall asleep. Understanding both can make it easier to identify why sleep feels restorative on some nights and disrupted on others. What is […]