What is energy availability? • Total daily caloric intake - total daily energy expenditure Total daily caloric intake - daily activity energy expenditure Total daily caloric intake - daily caloric expenditure from food digestion
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Step 1: Energy availability is the amount of energy that is left over after the body has used the energy it needs for basic functions and activities. Show more…
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In order to lose weight, energy expenditure must exceed energy intake. Negative energy balance occurs when the body is using more energy than it is taking in. BMR, or basal metabolic rate, is the main component of energy expenditure. This is the number of calories we burn that is needed for basic bodily functions, like pumping blood through our veins, enzyme production, cell turnover, and breathing, but does not include digestion. A BMR for an average, healthy adult is between 1200 calories and 1800 calories per day. In order to lose 1 lb of weight, a negative balance of 3500 calories must occur. Arthur is a 20-year-old student who gained 12 lb since becoming a college student 2 years ago; for the past 6 months, his weight has stabilized. Now he is interested in losing those 12 lb in 2 months. Arthur consumes 3000 calories per day. In order to lose 12 lb in 8 weeks, Arthur will need to: eat 2750 calories per day and exercise enough to burn 500 calories per day consume 3500 calories per day and exercise enough to burn 500 calories per day eat 3000 calories of low-fat food per day and exercise seven times per week, burning 100 calories each time run 6 miles per day, burning 800 calories, and eat 2500 calories of a high-protein diet per day
Sri K.
CALCULATION QUESTION: Calculate the Energy Availability (per kilogram fat-free mass) for the following individual: Weight is 145 pounds (65.9 kg) with 120 pounds Fat-Free Mass (54.5 kg FFM). Current energy intake is 1650 kcal/day. Exercise energy expenditure is 500 kcal/day. 30 kcal/kg Fat-Free Mass 25 kcal/kg Fat-Free Mass 18 kcal/kg Fat-Free Mass 21 kcal/kg Fat-Free Mass 39 kcal/kg Fat-Free Mass
How many kilocalories do I need on a daily basis? This is a question that most people who are healthy and maintain their body weight do not have to worry about. They maintain energy balance (calories in versus calories out) without thinking about it. But for those who have more difficulty maintaining their weight, estimating daily energy needs and keeping their kilocalorie intake in check may help them. Anna and her sister Theresa weighed almost the same until Anna went to college. Everybody has heard about the freshman 15! And yes, it is happening to Anna. Her jeans seem to be tight, and she does not even want to step on the scale. What happened? What can she do? Anna and Theresa are only one year apart; both are 5 feet 4 inches tall and before Anna left home, they both weighed 121 pounds. Both of them played on their school volleyball team, rode bikes to school, and were moderately active teenagers. Now in college, Anna studies way more than she did during high school, and so far she has not found friends to exercise with. She is not happy with her situation, but for now, her life has become sedentary. 1) What are Anna's total daily energy needs based on her desired body weight and level of physical activity that will allow her to maintain her precollege body weight? 2) Anna's sister, Theresa, is still in high school and lives at home. She still maintains her moderately active teenage lifestyle. What are Theresa's daily energy needs to maintain her weight?
Adi S.
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