Why is it important to stay hydrated before diving?

Staying hydrated before diving is crucial because hydration plays a vital role in managing nitrogen levels within the body. When a diver descends, the pressure increases and nitrogen is absorbed into the body tissues. Inadequate hydration can lead to thickening of the blood, which makes it more difficult for the body to eliminate nitrogen efficiently. This can increase the risk of decompression sickness, commonly known as ‘the bends,’ which occurs when nitrogen bubbles form in the bloodstream and tissues due to rapid pressure changes during ascent.

Proper hydration ensures that the body's physiological functions, including circulation and gas exchange, operate optimally, reducing the likelihood of nitrogen build-up and facilitating the safe ascent after a dive. Thus, maintaining hydration is a key preventive measure for divers to ensure their safety and well-being underwater.