Dehydration.
Dehydration occurs when the body loses excessive fluid. Blood thickens and slows down,and less reaches the working muscles, reducing your ability to exercise.
Not replacing fluids can result in lethargy, dizziness, headaches, cramps and a raised heart rate. This state is easy to avoid; simply remember to drink water before during and after exercising. Don’t wait until you’re thirsty.
For example, drink a couple of glasses before you start, then another for every 15 – 20 minutes of exercise. And don’t forget when you’re done to keep drinking to ensure that the lost fluids are replaced.
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