High School

Calculate the total energy intake for a 20-year-old male weighing 72 kg with a light activity level who is gaining 1 pound a week. Type in the correct answer from the options given in parentheses.

**BMR (Basal Metabolic Rate):**

The first step is to identify the BMR equation for a male, which is [tex]\text{kcal/kg body weight per hour}[/tex]. Options: (1.0, 0.9, 0.8)

Next, multiply this number by 72 kg and 24 hours/day to calculate his BMR in [tex]\text{kcal/day}[/tex]. Options: (2000, 1728, 1555, 1382)

**Activity:**

Multiply his BMR by the activity coefficient for light activity to calculate his activity level in [tex]\text{kcal/day}[/tex]. Options: (1210, 864, 778, 518, 467)

**Gain:**

Since he is gaining 1 lb per week, the next step is to identify the amount of calories in 1 pound of body fat, which is [tex]\text{kcal}[/tex]. Options: (3500, 1000, 350, 35)

Then, divide this number by the number of days in 1 week (7) to find that he is overeating [tex]\text{kcal/day}[/tex]. Options: (500, 143, 50, 5)

**TEF (Thermic Effect of Food):**

Add up his BMR, activity, and gain, and multiply this total by [tex]\text{%}[/tex] to calculate his TEF in [tex]\text{kcal/day}[/tex]. Options: (15, 10, 5, 0.5)

Calculate his TEF in [tex]\text{kcal/day}[/tex]. Options: (155, 142, 137, 132)

Answer :

Fnal answer:

The total energy intake for the 20-year-old male with a light activity level and gaining 1 pound a week is [tex]\( (1728 + 864 + 143) \times 0.1 = 273.5 \) kcal/d.[/tex]

Explanation:

To calculate the total energy intake (TEI), we begin with the Basal Metabolic Rate (BMR). For a male, the BMR equation is 0.9 kcal/kg body weight per hour. Given the individual weighs 72 kg, we multiply 0.9 by 72 and by 24 hours to get the BMR of 1555 kcal/d.

Next, we calculate the activity level by multiplying the BMR by the activity coefficient for light activity, which gives us 864 kcal/d. Then, we determine the calorie surplus due to gaining 1 pound per week. One pound of body fat is equivalent to 3500 kcal, so dividing by 7 days yields 500 kcal/d.

Finally, we calculate the Total Energy Expenditure (TEF) by summing up the BMR, activity, and gain, and then multiplying this total by 0.1 (10%) to account for the Thermic Effect of Food (TEF).

Therefore, the TEI is [tex]\( (1555 + 864 + 500) \times 0.1 = 273.5 \)[/tex] kcal/d. This calculation helps to understand the energy needs of the individual considering his weight, activity level, and the extra calories needed for weight gain, with a portion accounting for the energy expended during digestion and metabolism of food (TEF).

The complete question is:

Calculate the total energy intake for a 20-year old male weighing 72 kg with a light activity level and who is gaining 1 pound a week. Type in the correct answer from the options given in parentheses.

BMR:

The first step is to identify the BMR equation for a male, which is kcal/kg (1.0, 0.9, 0.8) body weight per hour. Next, multiply this number by 72 kg and 24 hours/d to calculate his BMR of kcal/d. (2000, 1728, 1555, 1382)

Activity:

Multiply his BMR by the activity coefficient for light activity to calculate his activity level of kcal/d. (1210, 864, 778, 518, 467)

Gain:

Since he is gaining 1 lb per week, the next step is to identify the amount of calories in 1 pound of body fat, which is kcal. (3500, 1000, 350, 35) Then, divide this number by the number of days in 1 week (7) to find that he is overeating kcal/d. (500, 143, 50, 5)

TEF:

Add up his BMR, activity, and gain, and multiply this total by % (15, 10, 5, 0.5) to calculate his TEF of kcal/d. (155, 142, 137, 132).

Now, you can proceed with the answer based on the provided options.

Other Questions