The physiological and biochemical processes by which an organism makes use of food for sustenance are known as nutrition. It involves various processes such as absorption, ingestion, assimilation, excretion, catabolism and biosynthesis. Nutrients refer to all those substances which are used by organisms for growth, survival and reproduction. They are broadly categorized into macronutrients and micronutrients. Exercise is defined as a physical activity which can maintain or enhance physical fitness and overall health. It also aids in the development of muscles and cardiovascular system, reducing weight, delaying aging process, and improving strength. Exercises can be broadly classified into aerobic exercises, anaerobic exercises, and flexibility exercises. They can also be defined as static exercise and dynamic exercise. This book strives to provide a fair idea about this discipline and to help develop a better understanding of the latest advances within this field. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included in it. This book is a complete source of knowledge on the present status of this important field.