Table 1.

Examples of methods for objective determination of hydration status

Measure	Reference range [94]	Euhydrated state [95]	95% probability of a dehydrated state (change score) [95]
Change in body mass (%)	N/A	≤ 1.0	≥ −2.5
Plasma osmolality (mOsmol/kg)	275-295	≤ 290	≥ +9
Urine specific gravity	1.003-1.035	≤ 1.020	≥ +0.010