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Sports Nutrition by Kary Woodruff

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Chapter 2

Measurement of Energy

All food consumed in the diet is digested, metabolized, and then absorbed through various enzymatic and physiological processes. The resulting metabolites are then used to meet immediate energy needs or are stored for later use depending upon the nutritional and physiological state of the body. All processes of the body require energy. Energy is the capacity to do work, and without energy we would not be able to sustain life, let alone participate in competitive sport. Understanding basic principles of energy transfer and measurement is essential for understanding the sports nutrition recommendations and applications.

This chapter examines direct and indirect methods used to quantify energy intake and expenditure. ...

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