Most people consider shoveling snow an undesirable winter chore.
Cardiologists, however, consider it to be strenuous exercise - and not for everyone. According to Boyd, heart patients and others with poor circulation or weak heart muscles should avoid shoveling snow. Breathing in cold air can increase your heart rate and blood pressure. If you already have a heart condition, shoveling snow simply makes it worse. If you have to shovel, Boyd recommends that you dress warmly, stretch your muscles before shoveling, take frequent breaks, and pay attention to the type of snow that falls.