• Respect your limits. Heat and humidity increase the physical challenge of running, and health problems can occur when you push beyond what your body can handle. Do not aim for a personal best on a warm, sticky day, particularly if you are not used to such conditions.
• Acclimate. It takes 10 days to two weeks for the body to acclimate to keeping cool at higher temperatures. Give your body time to adjust.
• Know the signs of heat problems. If you feel faint, dizzy, disoriented, or your skin is clammy and abnormally hot or cold, slow down or stop running. If symptoms continue, sit or lie down in the shade and seek medical help.