Circadian rhythms are changes in the body that follow a specific pattern from the biological clock, the body’s own timing device. They are based on specific proteins in the body that interact with cells at specific times. For example, Circadian rhythms have a big impact on sleep patterns.
- NIH: National Institute of General Medical Sciences. Circadian Rhythms. https://www.nigms.nih.gov/education/fact-sheets/Pages/circadian-rhythms.aspx (accessed 31. July 2020)