Nutrition Science and Everyday Application - beta v 0.1

Introduction to Nutrition and Physical
Activity
In this course, our focus is on how nutrients support health. However, enjoying good health
is about so much more than simply meeting nutrient needs. As we discussed in Unit 1, the
World Health Organization (WHO) defines health as “a state of complete physical, mental and
social well-being and not merely the absence of disease or infirmity.” For most people, being
physically active contributes to all three of those elements of health: physical, mental, and
social well-being.
Not surprisingly, the more you ask of your body in terms of physical activity, the more
attention you’ll need to give to fueling it with nutrients. With optimal nourishment, your body
will in turn reward you with improved performance and energy levels. Fueling a physically
active body is based on the same principles we’ve discussed throughout this course, but
requirements for energy and some nutrients are increased. In this unit, we’ll cover the
elements of physical fitness, the benefits of physical activity, and recommendations for
fueling an active lifestyle and athletic performance.
542