Sleep patterns refer to the regular cycles of sleep and wakefulness that individuals experience. These patterns can vary widely among people and are influenced by factors such as age, lifestyle, and overall health. Typically, a complete sleep cycle lasts about 90 minutes and includes different stages, including REM sleep and non-REM sleep, which play crucial roles in physical and mental restoration. Many people follow a circadian rhythm, which is a natural, internal process that regulates the sleep-wake cycle over a 24-hour period. This rhythm is influenced by external cues like light and temperature. Disruptions to sleep patterns, such as those caused by shift work or jet lag, can lead to sleep disorders and affect overall well-being.