Wear reflective clothing at dawn, dusk, or nighttime and bright, visible clothing at all other times. Carry a cell phone or change for a phone call. Know the locations of call boxes and telephones along your regular routes. Summer Running Running in sun, heat, and humidity requires that you take special precautions. Minimizing fluid loss and heat gain is essential.
Water is the vital ingredient in the prevention of heat injury.
Thirst is not a reliable indicator to warn a runner of fluid loss. Your body loses a considerable amount of fluid before you feel thirsty. Avoid caffeinated and alcoholic beverages which have a diuretic effect. Avoid dark clothing which absorbs heat. Run during the coolest part of the day.