By being prepared, outdoor exercise can be enjoyable and safe during any season.
Dehydration caused by excessive sweating can lead to heat exhaustion and heat stroke.
Drink fluids before, during, and after exercise even if you do not feel thirsty. Dress for the heat. Cotton is best when sweat-soaked because it has a cooling effect. As a rule, the higher the air temperature, the lower the humidity must be to avoid risk of heat injury. For example, when air temperature exceeds 80 degrees Fahrenheit, you are at risk if the humidity exceeds 50 percent.