For adults, total body water accounts for about 60~70% of total body weight. The percentage gradually reduces with the growth of age. For babies within 0~6 months, total body water accounts for about 80% of body weight. Water is the largest constituent of body tissues. Water involve in the metabolism of body, modulate normal osmotic pressure, maintain electrolyte balance and regulate body temperature. Water is essential and necessary for development and survival. Trial registration number: ChiCTR-ROC-17010320. Name of the registry: Relationship of drinking water and urination. Trial registrationĬhinese clinical trial registry. More studies should be conducted to find the diagnostic threshold on TFI and TWI which may disrupt the distribution of body fluid so as to prevent related diseases. However, whether TFI or TWI achieve AI or not do not disturb the balance on the distribution of body fluid. There is a certain degree of association between water intake and body fluid. Same correlations were found among both males and females. Among all participants, there was moderate correlation between water intakes (TFI/BW, FWI/BW and TWI/BW) and body fluid (ICF/BW,ECF/BW and TBW/BW) ( p < 0.01 for all). Among both males and females, the values of TBW/BW in participants whose TWI met or exceeded the AI were higher than those with TWI less than AI ( t = − 2.011, p = 0.046 t = − 2.716, p = 0.008). ICF, ECF and TBW among male participants who drank more than or equal to adequate TFI was higher than those who drank less ( Z = -1.985, p = 0.047 Z = -2.134, p = 0.033 Z = -2.053, p = 0.040). Total body water (TBW), intracellular fluid (ICF) and extracellular fluid (ECF) of participants were 32.8, 20.5 and 12.4, (kg). Body fluid was measured using bioelectrical impedance analysis. Water intake from foods (FWI) for 3 days was measured using the methods of weighting, duplicate portion method and laboratory analysis by researchers. A 7-day fluid specific diary was used to record total fluid intake (TFI). ![]() MethodsĪ total of 159 young adults in Baoding, China were recruited in this cross-sectional survey and completeness of follow-up was 98.1%. ![]() The objective of this study was to explore the association between body fluid and water intake. However, there are relatively few researches on the associations between water intakes and body fluid. Studies have shown that disease states and diuretics perturb the balance and then induce abnormal intracellular/extracellular fluid ratio. Normal distribution of body fluid is important for maintaining health through the balance of water metabolism.
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