Immersing in cold water lowers your core body temperature, which mimics the natural cooling process that signals the body it's time to sleep. This can help increase melatonin levels and improve sleep quality.
Activates the Parasympathetic Nervous System:
Cold water immersion reduces stress and promotes relaxation by activating the parasympathetic nervous system, leading to a natural increase in melatonin production.
Synchronizes Circadian Rhythm:
Exposure to cold water helps reset your internal clock by influencing the hypothalamus, the part of the brain responsible for regulating melatonin and circadian rhythm.
Reduces Cortisol Levels:
High cortisol (stress hormone) levels interfere with melatonin production. Cold plunges reduce cortisol, creating a more favorable environment for melatonin synthesis.
Supporting Research
A study published in Chronobiology International (2019) found that cold exposure enhances the body’s natural melatonin rhythm, leading to improved sleep patterns.
Research in Medical Hypotheses (2016) also highlights how cold water immersion can synchronize circadian rhythms, boosting melatonin production.
