Energy Requirements and Intake

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Questions and Answers

What percentage of energy expenditure does Basal Metabolic Rate (BMR) represent?

  • 50-60%
  • 80-90%
  • 60-70% (correct)
  • 70-80%

What is the formula to estimate BMR for a male aged 30-60 using Ismail's equation?

  • 0.0550(w) + 3.112
  • 0.0432(w) + 2.480
  • 0.0550(w) + 2.480
  • 0.0432(w) + 3.112 (correct)

What is the unit of measurement for BMR?

  • J/day
  • kcal/day
  • Watts
  • MJ/day (correct)

What is the Harris-Benedict equation used for?

<p>Estimating BMR using height, weight, age, and gender (A)</p> Signup and view all the answers

What is the percentage of energy intake that thermic effect of food (TEF) is usually estimated at?

<p>10% (D)</p> Signup and view all the answers

What is resting metabolic rate (RMR) equivalent to?

<p>BMR plus a small amount of additional energy expenditure associated with eating and previous muscular activity (B)</p> Signup and view all the answers

What is the difference between BMR and RMR?

<p>RMR is 10% greater than BMR (C)</p> Signup and view all the answers

What is the energy expenditure of a person who ingests 2000kcal on thermic effect of food (TEF)?

<p>200kcal (A)</p> Signup and view all the answers

What is the total daily energy expenditure (TDEE) for the individual described?

<p>2762 kcal/day (B)</p> Signup and view all the answers

What activity contributes the least to the individual's total daily energy expenditure?

<p>Sleeping/lying (A)</p> Signup and view all the answers

How is the Total Daily Energy Expenditure (TDEE) calculated according to the provided content?

<p>BMR x PAL (D)</p> Signup and view all the answers

In an energy balance context, what does a positive energy balance indicate?

<p>Weight gain (B)</p> Signup and view all the answers

Which of the following activities has the highest energy expenditure for this individual?

<p>Running (C)</p> Signup and view all the answers

What is the purpose of calculating energy intake?

<p>To manage energy balance effectively (B)</p> Signup and view all the answers

What is the estimated daily calorie intake for a sedentary individual weighing 70 kg?

<p>2600 kcal (D)</p> Signup and view all the answers

How many grams of protein are recommended for an active individual weighing 75 kg?

<p>135 g (C)</p> Signup and view all the answers

If a bodybuilder weighs 80 kg, what is their recommended daily calorie intake?

<p>3200 kcal (B)</p> Signup and view all the answers

What is the total energy (in kcal) derived from 100g of fat?

<p>900 kcal (D)</p> Signup and view all the answers

What is the total protein intake for an individual consuming 2800 kcal, if they maintain the ratio of 1.8 g protein per kg for their body weight of 70 kg?

<p>126 g (B)</p> Signup and view all the answers

Which nutrient provides the highest amount of energy per gram?

<p>Fat (C)</p> Signup and view all the answers

An ultra-active person with a weight of 65 kg should aim for how many kcal per day?

<p>3200 kcal (B)</p> Signup and view all the answers

What is the energy content in kcal for a diet consisting of 200g of carbohydrates and 50g of alcohol?

<p>1300 kcal (D)</p> Signup and view all the answers

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Study Notes

Energy Requirement

  • Energy intake is the amount of calories contained in the diet.
  • Energy expenditure is the sum of energy consumed by the body for physiological and biochemical functions (internal) and for physical activity (external work).

Estimating Energy Intake

  • Layman: 25-30 kcal/kg/day
  • Active: 30-35 kcal/kg/day
  • Very active: 35-40 kcal/kg/day
  • Ultra active: 40-60 kcal/kg/day

Energy Intake Based on Body Weight

  • 60 kg: 2400 kcal/day, 108g protein, 480g carbohydrates
  • 65 kg: 2600 kcal/day, 117g protein, 520g carbohydrates
  • 70 kg: 2800 kcal/day, 126g protein, 560g carbohydrates
  • 75 kg: 3000 kcal/day, 135g protein, 600g carbohydrates
  • 80 kg: 3200 kcal/day, 144g protein, 640g carbohydrates

Nutrient Used During Exercise

  • Energy in food is measured in calories (kcal)
  • Calorie conversion from nutrients:
    • CHO = 4 kcal/g
    • Fat = 9 kcal/g
    • Protein = 4 kcal/g
    • Alcohol = 7 kcal/g

Energy Expenditure

  • The sum of energy consumed by the body for physiological and biochemical functions (internal) and for physical activity (external work)
  • Components of energy expenditure:
    • Basal metabolic rate (BMR)
    • Thermic effect of food (TEF)
    • Thermic effect of activity (TEA)
    • Non-exercise activity thermogenesis (NEAT)

Estimating Energy Expenditure

  • BMR x PAL = kcal
  • BMR: 60-70% of total energy expenditure
  • Estimating BMR for Malaysian:
    • Male (18-30 years): 0.0550(w) + 2.480
    • Male (30-60 years): 0.0432(w) + 3.112
    • Female (18-30 years): 0.0535(w) + 1.994
    • Female (30-60 years): 0.0539(w) + 2.147
  • Harris-Benedict Equation:
    • For men: 66.5 + 13.8(weight in kg) + 5(height in cm) - 6.8(age in years)
    • For women: 655.1 + 9.6(weight in kg) + 1.8(height in cm) - 4.7(age in years)

Resting Metabolic Rate (RMR)

  • Represents BMR plus a small amount of additional energy expenditure associated with eating and previous muscular activity
  • RER tends to be 10% greater than BMR

Thermic Effect of Food (TEF)

  • 5-10% of energy intake
  • Process of food digestion and absorption requires energy and produces heat

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