Keep your workout to about 15 to 20 minutes. Each day, gradually increase your workout time by about 5 to 10 minutes. This will get your body acclimated to hotter weather and decrease your likelihood of suffering a heat-induced injury. Stay off the tar. Avoid exercising on tracks or streets with tarred surfaces, says Dr. Mahon.
Black tar absorbs incredible amounts of heat.
That heat will radiate back up off the tar and only make you hotter. Stick to the sidewalk or seek out dirt tracks. Seek the shade. Try to find places to exercise where there's shade or shelter from direct sunlight, suggests Dr. Mahon. Running along a tree-covered track will keep you much cooler than running in direct, glaring sun.