How does dehydration affect a swimmer's performance?

Dehydration significantly impacts a swimmer's performance primarily by leading to fatigue and an increased risk of drowning. When a swimmer is dehydrated, their body loses essential fluids and electrolytes that are critical for maintaining energy levels and optimal physiological function. This loss can impair cognitive function, physical performance, and reaction times, resulting in decreased stamina and endurance.

As the body struggles to maintain its performance due to inadequate hydration, the swimmer may experience muscle cramps, dizziness, and increased heart rate. These effects can lead to exhaustion, which in turn heightens the risk of accidents, including drowning, as the swimmer may not have the strength or clarity needed to respond to a dangerous situation effectively.

Furthermore, dehydration can lead to a decline in cardiovascular efficiency, reducing oxygen delivery to muscles and impairing overall physical capability. Therefore, ensuring proper hydration is essential for any swimmer to maintain peak performance and safety in the water.