Pre-sleep habits that may harm sleep quality

The report indicates that taking a cold shower before sleep may have counterproductive effects, as it stimulates the sympathetic nervous system and increases the secretion of the hormone norepinephrine, which causes stress. Additionally, it raises cortisol levels, which regulate blood sugar and blood pressure but can lead to sleep disturbances. Elevated cortisol also impacts mood, digestion, and immune functions, ultimately disrupting sleep quality and shortening its duration. While cold water is often recommended to boost activity and energy when feeling tired, it is not the ideal choice for relaxation and restful sleep. Studies highlight the importance of sleep, which typically requires about 8 hours, during which the body goes through three main stages before achieving full rest.

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