Final answer:
Heat cramps are involuntary muscle spasms caused by an electrolyte imbalance, primarily sodium depletion, not dehydration.
Explanation:
Heat Cramps and Heat Stress
Heat cramps are involuntary muscle spasms caused by an imbalance of electrolytes, usually sodium, not dehydration. Dehydration and excessive sweating may lead to electrolyte loss, but heat cramps primarily result from sodium depletion. Heat exhaustion, heat syncope, and heat stroke are other heat-related illnesses that can occur due to heat stress and dehydration.
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