Energy Assessment

Physical Activity

Authored by: Nancy L. Keim , Lisa Jahns

Handbook of Nutrition and Food

Print publication date:  July  2013
Online publication date:  April  2016

Print ISBN: 9781466505711
eBook ISBN: 9781466505728
Adobe ISBN:


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Physical activity is an important contributor to total energy expenditure (TEE). Physical activity can vary greatly within an individual from day-to-day, or between individuals because preferred physical activities, practices, and routines differ from one person to the next. These variations impact total daily energy expenditure (EE) and could potentially change energy balance. Accurately measuring the physical activity levels (PALs) of individuals is challenging due to the multi-faceted nature of movement, the limitations of measurement devices and/or self-report, and the potentially high respondent burden it imposes on those who are being measured.

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