Physical activity can help reduce gum disease by improving circulation, which allows the body to deliver more oxygen and nutrients to the gums. It can also help reduce stress, which is a known risk factor for gum disease. Regular physical activity can help control weight and blood sugar levels, both of which can also contribute to gum disease. However, it's important to note that physical activity alone is not enough to prevent gum disease; it should be combined with good oral hygiene habits such as brushing and flossing.