NFSC 100 Lecture Notes - Lecture 11: Lean Body Mass, Densitometry, Adipocyte
16 Oct 2016
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The formula for energy balance is: change in energy stores=energy in energy out, energy in energy out +or energy stores. Must be able to measure: energy in, energy out, body fatness. The energy in side of the body"s eery budget is measured in calories taken in each day in the forms of foods and beverages. Two major components: basal metabolism, voluntary activities, thermic effect of food. Can be calculated: via the formula, determined by observation of weight maintenance at a given level of intake overtime. The cost of digestion and absorption of food. Typically 5-7% of total dietary caloric intake. Released as heat: not useful for other body functions. Typically measured rst thing in the morning: before sitting up after waking. Re ects differences in age and sex as well as lean body mass. Basal metabolic rate uses 60-70% of energy most people burn in a day. Factors: age, growth, fever, malnutrition, thyroid, height, body composition, stress, ambient temperature, fasting/starvation.
