Ask Me Anything Part 16: Dream Time, Circadian Changes, & Night Sweats

Time perception in dreams often involves dilation, where subjective time stretches significantly compared to real-world duration, a phenomenon linked to emotional intensity and neural memory replay speeds. REM sleep specifically slows down memory replay, contrasting with the rapid compression observed during deep non-REM sleep. Intentional sleep deprivation causes widespread physiological and cognitive impairment, including reduced learning capacity, emotional dysregulation, increased stress hormones, and metabolic disruption. Furthermore, chronotypes are biologically determined by genetics, serving an evolutionary "sentinel" function that ensures group safety. While specific protocols can slightly shift sleep timing, forcing individuals to fight their natural chronotype often leads to health and productivity declines. Finally, night sweats frequently occur during REM sleep due to a temporary suspension of thermoregulation, leaving the body vulnerable to ambient temperatures rather than being a direct result of anxiety-induced thrashing.