Final answer:
The consequence of massive sweating without appropriate rehydration and salt replacement is hyponatremia, a serious condition characterized by a low concentration of sodium in the blood.
Step-by-step explanation:
The consequence of massive sweating without water and salt replacement is hyponatremia. This condition occurs as a result of the lower-than-normal concentration of sodium in the blood, which can happen when someone sweats excessively without replacing the lost water and sodium. Hyponatremia can lead to dehydration and symptoms like muscular cramps, edema, headache, nausea, and diarrhea. It's also associated with more severe consequences such as reduced blood pressure, decreased blood volume, and potential circulatory failure. To prevent electrolyte imbalances during activities like jogging in the heat, it's recommended to consume sports drinks that can help restore electrolytes quickly in the body.