Public health nutrition and exercise is an important aspect of chronic disease prevention and health promotion. Public health  nutritionists provide education on healthy diets, and public health program managers, with a focus on nutrition, may manage  efforts to ensure people have access to healthy food while working on policies to reduce “food deserts” (locations without  access to healthy food). A related area is physical fitness or exercise. Individuals with training in health program management  may oversee programs that provide access to exercise and fitness and work in designing environments that provide access to  safe places to exercise.