Blood/serum parameters during normo-, de-, and rehydration

Parameter	Normohyd	Dehyd	Rehyd
Na⁺ (mmol/L)	137.1 ± 2.7	138.5 ± 2.2	136.9 ± 2.3
K⁺ (mmol/L)	4.6 ± 0.4^{^a}	5.2 ± 0.6^{^a}	4.9 ± 0.4^{^a}
HCT (%)	41.9 ± 2.9	43.8 ± 2.9	42.5 ± 2.9
MCHC (g/dL)	34.3 ± 0.9	34.3 ± 0.8	34.3 ± 0.8
Urea (mg/dL)	27.4 ± 6.2	26.8 ± 5.9	25.5 ± 5.6
OSM_serum (mOsm/kg)	312.7 ± 4.8^{^a}	314.8 ± 4.1^{^a}	311.8 ± 4.7^{^a}
Glucose (mg/dL)	92.1 ± 6.8^{^a}	84.4 ± 6.9^{^a}	85.5 ± 5.9^{^a}

Note:—Normohyd indicates normohydration; Dehyd, dehydration; Rehyd, rehydration; MCHC, mean corpuscular hemoglobin concentration.
↵a Significant changes among different levels of hydration (normo-, de-, and rehydration) at type I error probabilities of P < .05 (1-sided t tests; df = 14).