Here are the key points about dehydration effects from the document:
- Dehydration occurs when there is excessive loss of water from the body, depleting body fluids.
- Common symptoms of mild dehydration include nausea, lightheadedness, dizziness, which can occur rapidly after only an hour of activity on a hot day.
- More severe dehydration if untreated can require medical attention. Symptoms will resolve quickly with water replacement for mild cases.
- Overhydration can also be dangerous, causing water toxicity with symptoms like nausea, muscle cramps and confusion.
- It's important to replace electrolytes like sodium, potassium and chloride lost through sweat to maintain acid-base balance