In extreme temperatures, safe exercising guidelines include hydrating adequately before, during, and after exercise, as well as dressing in appropriate clothing to regulate body heat. In hot weather, try to exercise during cooler parts of the day, such as early morning or late evening, and avoid high-intensity workouts. In cold climates, warm up indoors and wear layered, moisture-wicking fabrics. Always listen to your body: if you experience symptoms like dizziness or excessive fatigue, it’s crucial to stop and rest. Taking these precautions can help prevent heat-related illnesses or hypothermia during physical activity.