If you go out to shovel snow, do a few stretching exercises to warm up your body. Also take frequent breaks. Cover your mouth. Protect your lungs from extremely cold air by covering your mouth when outdoors. Try not to speak unless absolutely necessary.
Cold weather puts an added strain on the heart.
Unaccustomed exercise such as shoveling snow or pushing a car can bring on a heart attack or make other medical conditions worse. Be aware of symptoms of dehydration. Watch for signs of frostbite and hypothermia. Change wet clothing frequently to prevent a loss of body heat. Wet clothing loses all of its insulating value and transmits heat rapidly.