| Occupation | Increase in the basal metabolism in per cent. |
|---|---|
| Sitting | 5 |
| Standing, relaxed | 10 |
| Standing, hand on a staff | 11 |
| Standing, leaning on support | 3 |
| Standing, "attention" | 14 |
If one wishes to determine from the basal metabolism table the heat production of a person who is confined to his room, one should add to the metabolism of the twenty-four hours the increase above the basal for those hours of the day during which he is sitting in a chair or standing.
Passing to a consideration of the subject of mechanical work done by a man, one finds that it requires about 1.1 calories to transport a pound of body weight three miles during an hour, and that increasing power must be generated if the speed is increased above this rate of maximal economic velocity.
These relations are shown below:
| Rate of movement | Extra calories per hour required to move 1 pound of body |
|---|---|
| Walking 3 miles per hour | 1.1 |
| Walking 5.3 miles per hour | 3.6 |
| Running 5.3 miles per hour | 3.1 |
If one wishes to determine the heat production of a man weighing 156 pounds and 5 feet, 7 inches in height, and who is walking or running, the following calculations can be made:
| Rate of travel per hour in miles | 3[3] Cals. | 5.3[3] Cals. | 5.3[4] Cals. |
|---|---|---|---|
| Metabolism for transporting 156 pounds | 172 | 562 | 484 |
| Basal metabolism | 70 | 70 | 70 |
| Add for standing | 7 | 7 | 7 |
| 249 | 639 | 561 |
If the man's food cost 10 cents a thousand calories, it may be calculated that he would have to walk over eight miles at a rate of three miles per hour in order to save money when he pays a 5-cent carfare. (This, however, does not include the cost of shoe leather.)