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Question: linda is a normal healthy young woman aged 25 years...

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Linda is a normal, healthy young woman, aged 25 years. She weighs 65 kg, and her weight has remained steady for the past three years. She is a student, who spends much of her time in classes and studying. During a typical day, she spends 8 hours asleep in bed (basal metabolic rate [BMR] only) and 4 hours walking to and from classes or other moderately vigorous exercise (2.0 kcal/kg/h in addition to BMR). She spends the rest of the day in sedentary activities (0.5 kcal/kg/h in addition to BMR). Three times a week, she works out in the gym for one hour; during these workouts her energy expenditure is 7.0 kcal/kg/h in addition to BMR.

Questions on Weight Gain and Loss

(In general, round off results of nutrition calculations to whole numbers)

  1. What was Linda's average weekly and daily energy requirement?

  2. Linda was eating a candy bar each day. The nutrition information on the package told her that it contained 3.2 g protein, 14 g fat and 31 g carbohydrate. How much energy does this candy bar supply?

  3. If Linda eliminates the candy bar from her daily food intake, how much weight would she be expected to lose in 30 days, without changing her exercise habits? (Assume all the weight loss is fat)

  4. Linda would like to lose 5 kg. So in addition to omitting the candy-bar, she increases her gym workouts from 3 to 6 times a week. How much additional energy does this consume per average day?

  5. With the combined decrease in food intake and increased exercise, how long would it take for Linda to achieve her goal of losing 5 kg? (Assume that all the weight loss is due to fat).

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