Question

how much energy is transformed in 24 h by a 65- kg person who spends 8.0 h sleeping, 1.0 h at moderate physical labor, 4.0 h in light activity, 9.5 h working at a desk or relaxing and runs for 1.5 h with speed 15 km/h?

Answer 1

The estimated energy expenditure for a 65 kg person in 24 hours is approximately 3532.5 kcal, considering sleep, moderate labor, light activity, desk work, and running at 15 km/h.

Sure, let's go step by step through the calculations:

1. Sleeping:

`\[ Energy_{\text{sleeping}} = 0.9 \, \text{MET} * 65 \, \text{kg} * 8.0 \, \text{h} \]`

`\[ Energy_{\text{sleeping}} = 0.9 * 65 * 8 \]`

`\[ Energy_{\text{sleeping}} = 468 \, \text{kcal} \]`

2. Moderate physical labor:

`\[ Energy_{\text{labor}} = 4.0 \, \text{MET} * 65 \, \text{kg} * 1.0 \, \text{h} \]`

`\[ Energy_{\text{labor}} = 4.0 * 65 * 1 \]`

`\[ Energy_{\text{labor}} = 260 \, \text{kcal} \]`

3. Light activity:

`\[ Energy_{\text{light activity}} = 2.0 \, \text{MET} * 65 \, \text{kg} * 4.0 \, \text{h} \]`

`\[ Energy_{\text{light activity}} = 2.0 * 65 * 4 \]`

`\[ Energy_{\text{light activity}} = 520 \, \text{kcal} \]`

4. Desk work or relaxing:

`\[ Energy_{\text{desk/relax}} = 1.8 \, \text{MET} * 65 \, \text{kg} * 9.5 \, \text{h} \]`

`\[ Energy_{\text{desk/relax}} = 1.8 * 65 * 9.5 \]`

`\[ Energy_{\text{desk/relax}} = 1114.5 \, \text{kcal} \]`

5. Running:

`\[ Energy_{\text{running}} = 12.0 \, \text{MET} * 65 \, \text{kg} * 1.5 \, \text{h} \]`

`\[ Energy_{\text{running}} = 12.0 * 65 * 1.5 \]`

`\[ Energy_{\text{running}} = 1170 \, \text{kcal} \]`

Now, add up all these energy expenditures to get the total energy expended in 24 hours:

`\[ \text{Total energy expenditure} = 468 + 260 + 520 + 1114.5 + 1170 \]`

`\[ \text{Total energy expenditure} = 3532.5 \, \text{kcal} \]`

So, a rough estimate of the energy expended in 24 hours by the 65 kg person engaging in the described activities would be approximately 3532.5 kcal.