Safety precautions when exercising outdoors include wearing appropriate clothing, using sunscreen, and staying hydrated. It's vital to choose suitable footwear for the activity to prevent injuries and to be aware of local weather conditions to avoid heat-related illnesses or hypothermia. Additionally, training with a buddy can enhance safety, providing assistance in case of emergencies. Familiarizing oneself with the environment and being conscious of traffic, wildlife, and other potential hazards is crucial for avoiding accidents while enjoying outdoor exercise.