Sleep and Circadian Rhythm disruption are very common in ME/CFS, Long Covid and Fibromyalgia. Circadian rhythms — the body's internal 24-hour clock — play a vital role in regulating sleep, metabolism, hormone release, and digestion. When disrupted, they can significantly affect health, particularly people with ME/CFS, Long Covid and Fibromyalgia, where sleep disturbances and fatigue are common.
