Body Water

Definition

Body water represents the proportion of body weight comprised of water, approximately 50-70% depending on age and sex. It is distributed between intracellular and extracellular compartments.

How it works

Water is the universal solvent of the human body and participates in all vital chemical reactions. It represents approximately 60% of body weight in a young adult, but this proportion decreases with age (down to 50% in the elderly) and is higher in men than in women due to muscle composition differences. Water is divided into two compartments: intracellular water (two thirds) and extracellular water (one third, including blood plasma). Hydration balance is crucial for thermoregulation, nutrient transport, and waste elimination. Dehydration affects cognitive and physical performance, while overhydration can be hazardous.

Role

Body water regulates temperature, transports nutrients, eliminates waste, and participates in all metabolic reactions.

Examples

• A man of 80 kg with 60% body water contains 48 liters of water. A woman with 55% body water for 65 kg containing 35.75 liters. An athlete with optimal hydration for performance.

Recommendations

Drink approximately 2-3 liters of water per day, adapt your consumption to physical activity and climate, and observe the color of your urine (pale indicates good hydration). Avoid excessive consumption that could dangerously dilute electrolyte balance.

Key takeaway

Maintaining adequate hydration is fundamental for health and proper functioning of all bodily systems.

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