Briefly describe what heatstroke does to the body and a situation where it is more likely to affect someone performing a physical activity

Symptoms of heat stroke can take different forms:

    - Intense thirst;
    - Dizziness and lightheadedness;
    - Sweating;
    - High fever (up to 41 ° C);
    - Weakness and general fatigue intense;
    - A hot, dry skin;
   - Muscle cramps;
   - headaches ;
    - Nausea, vomiting, diarrhea;
    - Blurred vision;
    - Rapid breathing;
    - High blood pressure or too low otherwise.

Then may occur:

    - Confusion, delusional behavior;
     -sometimes, convulsions;
    - Potential loss of knowledge followed by coma.


When it is hot, athletes can remove 1 to 2 liters of sweat per hour, and most drink less liquid they eliminated through perspiration, resulting in dehydration.
Dehydration increases heart rate and decreases cardiac output. The perception of exhaustion increases, because dehydration weakens mental acuity and will, in addition to lessen muscle strength and endurance. The temperature of the dehydrated athletes growing faster.
(extreme and sudden elevation in core temperature following intense muscular activity or work that causes a mismatch of body control systems with altered cellular metabolism and multi visceral pain.)