Human energy demands
How much energy do we need to take
from food in each 24 W hours? The answer depends very much on the sort of
people we are particularly on our age and our work.
Some needs are shown in the following table:
|
Energy (kJ/day) |
|
CHILDREN |
|
|
0-1 year old |
4200 |
|
2-6 years old |
6300 |
|
7-10 years old |
8400 |
|
|
|
|
TEENAGERS |
BOYS |
GIRLS |
11-14 years old |
11500 |
11500 |
15-19 years old |
14700 |
10500 |
|
|
|
ADULTS |
MEN |
WOMEN |
Lying in bed all day |
7400 |
6300 |
Working 8 hours per day |
|
|
|
|
|
Light work |
12000 |
9500 |
Heavy work |
15000 |
12500 |
Very heavy work |
21000 |
|
|
|
|
PREGNANCY |
|
|
Early months |
|
10000 |
Late months |
|
11500 |
Nursing the baby |
|
12500 |
|
|
|
Activities |
kJ per minute |
|
Resting in bed |
4 |
|
Washing, shaving, dressing |
14 |
|
Walking |
21 |
|
Standing |
7.5 |
|
Cycling |
28 |
|
Hewing coal |
28 |
|
Loading coal |
26 |
|
Working in a mine |
28 |
|
|
|
|
Power of the heart |
1W |
|
Power of the brain |
25W |
|
Power of a 15 year old student |
350-700W |
|