May improve central nervous system function

Warm water has a special effect on the autonomic nervous system, which is the area of the central nervous system that regulates essential bodily functions including the heart, lungs, and blood vessels. The result is a relaxing effect that balances the autonomic system perfectly. A decrease in blood pressure, an increase in endocrine function, as well as an improvement in mood and cognitive performance have all been linked to this autonomic balance.

Drinking insufficient amounts of hot or cold water can have a negative impact on how well your nervous system is functioning, which can influence your mood and brain function. Drinking water can enhance the functioning of the central nervous system and mood, according to 2019 research. According to this study, drinking water during strenuous activities increased participants' brain activity and decreased their self-reported anxiety.