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. Author manuscript; available in PMC: 2011 Jun 2.
Published in final edited form as: Int J Body Compos Res. 2008;6(4):173–184.

Table 1.

Assumed constant parameters in young adults.

Symbol Definition Units Constant
a Fraction of body cell mass as water kg/kg 0.70
b Fraction of extracellular fluid as water kg/kg 0.98
c Ratio of extracellular solids to total body water kg/kg 0.14
DBCM Density of body cell mass kg/l 1.078
DECF Density of extracellular fluid kg/l 1.010
DECS Density of extracellular solids kg/l 1.96
[K]ECW Potassium concentration in extracellular fluid mmol/kg H2O 4
[K]ICW Potassium concentration in intracellular fluid mmol/kg H2O 152
[Ms]ECW Concentration of soft-tissue minerals in extracellular fluid kg/kg H2O 0.00954
[Ms]ICW Concentration of soft-tissue minerals in intracellular fluid kg/kg H2O 0.01617
[Pro]BCM Protein concentration in body cell mass kg/kg 0.27
[Pro]ECF Protein concentration in extracellular fluid kg/kg 0.01
[Pro]ECS Protein concentration in extracellular solids kg/kg 0.423