When exercising in extreme conditions, consider several health considerations to ensure safety. Pay attention to temperature, humidity, and air quality, as they can significantly impact performance and risk of injuries, such as heat-related illnesses or hypothermia. Acclimatization is vital; gradually increase exposure to extreme environments. Dress appropriately for conditions, hydrate adequately, and listen to your body’s signals. Additionally, knowing when to modify or cease exercise is crucial to maintain overall health.