Formulae
1. Room vapor pressure = Relative Humidity X Sat. Vapor pressure
2. Dry air is .2095 oxygen. Determine the fraction of oxygen in room air as follows:
4. O2 consumed/min = minute volume(O2 fraction inhaled - O2 fraction exhaled)
6. g O2 cons./min STPD = L O2 Cons/min STPD X 1.43 g/L
7. Heat produced per minute in cal/min = L O2 cons/min STPD X 4825 cal/ L O2
8. Surface area can be calculated with a formula using weight in Kg and height in centimeters. Surface area ( M2 = 0.007184 X Kg0.425 X cm0.725)
10. 1 KpM = 234 cal
11. Calories required/min = KpM</min X 234 cal/Kpm
12. Calories used for muscle work = (Exercise Heat production/min - BMR/min) = ((cal/min at work) - (cal/min BMR)) = cal/min
1 inch = 2.54 cm
1 pound = 0.454 Kg
Mean Standard Metabolic Rates per square meter of Surface Area in Kcal/sq. M hr
|
AGE(YR) |
MALES |
FEMALES |
|
14-16 |
46.0 |
43.0 |
|
16-18 |
43.0 |
40.0 |
|
18-20 |
41.0 |
38.0 |
|
20-30 |
40.0 |
37.0 |
|
30-40 |
39.5 |
36.5 |
|
40-50 |
38.5 |
36.0 |
|
50-60 |
37.5 |
35.0 |
|
60-70 |
36.5 |
34.0 |
|
70-80 |
35.5 |
33.0 |