NUTR 125 Lecture Notes - Lecture 20: Indirect Calorimetry, Muscle Tone, Sedentary Lifestyle
Document Summary
Fruitarians- primarily eat fruits, nuts, honey, and veg. oils. Nutrient concerns: vitamin b12, iron, zinc, calcium, omega 3 fatty acids. Red flags: 10 lbs of weight gain, 2-in increase in waist circumference. The role of environment as a cause of obesity. Energy intake: availability and marketing of palatable energy-dense foods. Change of eating behaviors: snacking, portion size, individual"s unique food preference, individual"s microenvironment, number of people with whom one eats. Energy expenditure: sedentary lifestyle, use of energy-sparing devices (decrease physical activity) Minimum energy expended to keep a resting, awake body alive (expressed as basal metabolic rate, bmi/rmr) Includes energy needed for maintaining heartrate, respiration, body temp. For someone who is 170 lbs: first convert to kg: 170/2. 2=77. 27 g, rounded to 77 kg, 77kg*1 kcal/kg= 77 kcal/hour, 77 kcal/hr* 24 hrs= 1848 kcal. 20-30% of the total calorie consumed lack of activity is a major cause of obesity. Energy used to digest, absorb, and metabolize food nutrients.
