Electrolytes and Physical Activity
Sports-drink commercials often mention electrolytes, but why do we need these chemicals, and what happens if we don’t have enough of them? Electrolytes are salts that help our cells move water around, and enable nerve impulses that keep our hearts beating, our lungs breathing, and our brains learning. But our bodies can also lose electrolytes—for example, by sweating. Given all the ins and outs of electrolytes, should you reach for that brightly colored sports drink after running around the block? This video may have the answer.
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