This easy-to-use reference provides scientifically-based nutrition guidelines for a wide range of physically-active clients—including vegetarians, pregnant and menopausal women, children and adolescents, older adults, people with diabetes, and participants in weight-restricted sports. Written in a straightforward manner, this text is ideal for athletic trainers and personal trainers. It allows them to guide clients in proper eating for optimal exercise performance, and it recognizes when a client needs to be referred to a registered dietitian. The text may also be used as a quick reference for nutritionists and dietitians.