Hydration status, total water intake and subjective feelings of adolescents living in a hot environment, during a typical school day

Author(s):  
George Aphamis ◽  
Pinelopi S. Stavrinou ◽  
Eleni Andreou ◽  
Christoforos D. Giannaki

AbstractAimIndividuals living in a hot environment appear to face increased risk of dehydration. Currently there is not extensive literature on the adolescent population in relation to hydration. The aim of the present study was to assess hydration status and total water intake (TWI) at school, of adolescents living in a hot environment, and to investigate the association of hydration and TWI with various subjective feelings.MethodsThe hydration status of 141 adolescents (boys n = 102), age 15–17 years, was assessed via urine specific gravity (USG), at the beginning (07:30 am) and at the end (1:30 pm) of one school day. TWI from fluids and solid food was assessed via detailed food and fluid records. Subjective feelings (i.e. thirst, alertness, ability to concentrate) were recorded by specific scales.ResultsNinety percent of the students arrived dehydrated at school (USG >1.020). Thirteen students were hydrated (USG <1.020), 67 students were slightly dehydrated (USG 1.021–1.029), and 50 students were seriously dehydrated (USG >1.030). There was no difference in TWI between the three groups (765 ± 451 mL). TWI correlated with alertness (p = 0.005) and the ability to concentrate (p = 0.015), and inversely correlated with fatigue (p = 0.015). Seriously dehydrated students felt less alert in the morning (p < 0.035) whereas the feeling of thirst was similar between all groups.ConclusionsThe prevalence of the dehydration of the adolescents during school time appeared to be extremely high, and thirst was not driving those adolescents to drink enough. Apart from health concerns, school performance could be affected by dehydration and inadequate water intake.

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Alejandra Carretero-Krug ◽  
Natalia Úbeda ◽  
Carlos Velasco ◽  
Juan Medina-Font ◽  
Trinidad Trujillo Laguna ◽  
...  

Abstract Background An adequate hydration status is critical to ensure efficiency during mental and physical activities. Our goal was to assess the hydration status of a Spanish group of aeronautical military men and to determine the association of hydration status with body composition and anxiety. Methods A total of 188 men were evaluated through a validated hydration questionnaire, anthropometric and biochemical parameters, and an anxiety questionnaire. Based on these methods, the criteria of hydration were established. Results Of the total sample, 81% met the hydration criteria (urine color = well hydrated, water balance ≥ 0 ml, and total water intake/weight ≥ 35 ml/kg), and 19% did not meet the hydration criteria (urine color = not sufficiently hydrated or dehydrated, water balance < 0 ml, and total water intake/weight < 35 ml/kg). Subjects not meeting the hydration criteria had lower urine pH, negative water balance, and lower water intake. The latter also had higher anxiety status (score = 4 vs. 3, P = 0.026), weight [(84.7 ± 10.5) vs. (80.5 ± 10.2) kg], body mass index [(26.3 ± 3.1) vs. (25.2 ± 2.8)]kg/m2, body fat [(22.3 ± 5.6) vs. (18.3 ± 6.5)] %, urine specific gravity, and urine color. Using a logistic binary regression model, hydration status was related significantly with the percentage of body fat (P = 0.004), but no relation was found with age, comorbidities, or medications. Furthermore, total water intake/weight was positively correlated with percentage of body water (r = 0.357, P = 0.000) and negatively with body fat (kg) (r = − 0.427, P = 0.000), percentage of body fat (r = − 0.405, P = 0.000), and waist/hip ratio (r = − 0.223, P = 0.002). Based on a linear regression model, total water intake/weight was related significantly with percentage of body fat (P = 0.001) and percentage of body water content (P = 0.035). No relation was found, however, with waist/hip ratio, age, comorbidities, or medications. Conclusions These findings all suggest a relationship between hydration status and body composition but also set the bases for future studies that relate hydration status and anxiety status. These results can be used to improve the hydration status and body composition of military personnel.


2017 ◽  
Vol 13 (4) ◽  
pp. 414-423
Author(s):  
Ismael San Mauro Martín ◽  
Elena Garicano Vilar ◽  
Denisse Aracely Romo Orozco ◽  
Paula Mendive Dubourdieu ◽  
Victor Paredes Barato ◽  
...  

Physical activity, adherence to a healthy diet, and healthy beverage pattern are considered essential components of a healthy lifestyle. We aimed to evaluate the associations between physical exercise, diet quality, and total fluid intake, along with fluid recommendations compliance in a sample of adults. Data on fluid intake from different types of beverages were collected in a cross-sectional study, in 1161 men and women between 18 and 65 years of age, using a fluid-specific diary. Exercise was evaluated with a self-reported questionnaire, and quality of diet was assessed using the Healthy Eating Index-2010 (HEI). Mean volume of water consumed was 1497.5 mL for men, 1309.5 mL for women. A total of 37.4% did not follow the recommendations of the European Food Safety Agency for total water intake. There was a statistically significant difference ( P = .002) between total water intake and follow-up of recommendations, as well as for sex ( P < .001). Mean HEI-2010 score was 65.21. There were no statistically significant differences ( P = .301) in HEI index among better or worse hydration. Sport variables had influence on milliliters of water consumed ( P < .001). Participants who engaged in more physical exercise exhibit a healthier pattern of fluid intake. Healthy individuals with the highest scores for HEI-2010 did not present the healthiest beverage patterns.


2020 ◽  
Author(s):  
Alejandra Carretero-Krug ◽  
Carlos Velasco ◽  
Juan Medina-Font ◽  
Trinidad Trujillo Laguna ◽  
Gregorio Varela-Moreiras ◽  
...  

Abstract Background: An adequate hydration status is critical to ensure efficiency during mental and physical activities. Our goal was to assess the hydration status of a Spanish group of aeronautical military men and to determine the association of hydration status with body composition and anxiety.Methods: 188 men were evaluated through a validated hydration questionnaire, anthropometric and biochemical parameters, and an anxiety questionnaire. According to that, criteria of hydration was established.Results: 81% of the total sample met hydration criteria (urine color = Well hydrated, Water Balance ≥ 0 mL, and total water intake/weight ≥35 mL/kg) and 19% did not meet hydration criteria (urine color = Not enough hydrated or Dehydrated, Water Balance < 0 mL, and total water intake/weight < 35 mL/kg). Subjects not meeting the hydration criteria had lower urine pH, negative water balance, and lower water intake. The latter also had higher anxiety status (score= 4 vs 3, p=0.026), weight (84.7 ± 10.5 vs 80.5 ± 10.2 Kg), Body Mass Index (26.3 ± 3.1 vs 25.2 ± 2.8 kg/m2), body fat (22.3 ± 5.6 vs 18.3 ± 6.5 %), urine specific gravity and urine color. The Hydration Status, in a logistic binary regression model was related significantly with the percentage of body fat (p=0.004), but no relation was found with age, comorbidity and medication. Furthermore, total water intake/weight was positively correlated with percentage of body water (rho=0.357, p=0.000) and negatively with body fat (kg) (rho= -0.427, p=0.000), percentage of body fat (rho= -0.405, p=0.000) and waist/hip ratio (rho= -0.223, p=0.002). The total water intake/weight, in a linear regression model was related significantly with the percentages of body fat (p=0.019) and body water (p= 0,035). No relation was found, however, with waist/hip ratio, age, comorbidity and medication.Conclusion: All these findings suggest a relationship between hydration status and body composition, but also set the bases for future studies that relate hydration status and anxiety status. These results can be used to improve the hydration status and body composition of military personnel.


2020 ◽  
Author(s):  
Alejandra Carretero-Krug ◽  
Carlos Velasco ◽  
Juan Medina-Font ◽  
Trinidad Trujillo Laguna ◽  
Gregorio Varela-Moreiras ◽  
...  

Abstract BackgroundAn adequate hydration status is critical to ensure efficiency during mental and physical activities. Our goal was to assess the hydration status of a Spanish group of aeronautical military men and to determine the association of hydration status with body composition and anxiety.Methods188 men were evaluated through a validated hydration questionnaire, anthropometric and biochemical parameters, and an anxiety questionnaire. According to that, criteria of hydration was established. Results81% of the total sample met hydration criteria (urine color = Well hydrated, Water Balance ≥ 0 mL, and total water intake/weight ≥35 mL/kg) and 19% did not meet hydration criteria (urine color = Not enough hydrated or Dehydrated, Water Balance < 0 mL, and total water intake/weight < 35 mL/kg). Subjects not meeting the hydration criteria had lower urine pH, negative water balance, and lower water intake. The latter also had higher anxiety status (score= 4 vs 3, p=0.026), weight (84.7 ± 10.5 vs 80.5 ± 10.2 Kg), Body Mass Index (26.3 ± 3.1 vs 25.2 ± 2.8 kg/m2), body fat (22.3 ± 5.6 vs 18.3 ± 6.5 %), urine specific gravity and urine color. The Hydration Status, in a logistic binary regression model was related significantly with the percentage of body fat (p=0.004), but no relation was found with age, comorbidity and medication.Furthermore, total water intake/weight was positively correlated with percentage of body water (rho=0.357, p=0.000) and negatively with body fat (kg) (rho= -0.427, p=0.000), percentage of body fat (rho= -0.405, p=0.000) and waist/hip ratio (rho= -0.223, p=0.002). The total water intake/weight, in a linear regression model was related significantly with the percentages of body fat (p=0.019) and body water (p= 0,035). No relation was found, however, with waist/hip ratio, age, comorbidity and medication.ConclusionAll these findings suggest a relationship between hydration status and body composition, but also set the bases for future studies that relate hydration status and anxiety status. These results can be used to improve the hydration status and body composition of military personnel.


2020 ◽  
Author(s):  
Alejandra Carretero-Krug ◽  
Carlos Velasco ◽  
Juan Medina-Font ◽  
Trinidad Trujillo Laguna ◽  
Gregorio Varela-Moreiras ◽  
...  

Abstract Background: An adequate hydration status is critical to ensure efficiency during mental and physical activities. Our goal was to assess the hydration status of a group of aeronautical military men and to determine the association of hydration status with body composition and anxiety. Methods: 188 men were evaluated through a validated hydration questionnaire, anthropometric and biochemical parameters, and an anxiety questionnaire. According to that, criteria of hydration was established. Results: 81% of the total sample met hydration criteria (urine color = Well hydrated, Water Balance ≥ 0 mL, and total water intake/weight ≥ 35 mL/kg) and 19% did not meet hydration criteria (urine color = Not enough hydrated or Dehydrated, Water Balance < 0 mL, and total water intake/weight < 35 mL/kg). Subjects not meeting the hydration criteria had lower urine pH, negative water balance, and lower water intake. The latter also had higher anxiety status (score = 4 vs 3, p = 0.026), weight (84.7 ± 10.5 vs 80.5 ± 10.2 Kg), Body Mass Index (26.3 ± 3.1 vs 25.2 ± 2.8 kg/m2), body fat (22.3 ± 5.6 vs 18.3 ± 6.5%), urine specific gravity and urine color. Furthermore, total water intake/weight was positively correlated with percentage of body water (rho = 0.357, p = 0.000) and negatively with body fat (kg) (rho= -0.427, p = 0.000), percentage of body fat (rho= -0.405, p = 0.000) and waist/hip ratio (rho= -0.223, p = 0.002). Conclusions: All these findings suggest a relationship between hydration status and body composition. These results can be used to improve the hydration status and body composition of military personnel. Trial registration: This study was conducted according to the guidelines laid down in the Declaration of Helsinki and all procedures involving human subjects were approved by the Clinical Research Ethics Committee of the CEU San Pablo University (Madrid). The corresponding ethical code was 119/16/08.


2017 ◽  
Vol 70 (Suppl. 1) ◽  
pp. 13-17 ◽  
Author(s):  
Saptawati Bardosono ◽  
Clémentine Morin ◽  
Isabelle Guelinckx ◽  
Rizki Pohan

The primary aim of this cross-sectional survey was to assess the total fluid intake (TFI; sum of drinking water and all other fluids) and the intake of water and all other types of beverages in a sample of pregnant and breastfeeding women representative of Java-Island, Indonesia. Therefore, 299 pregnant and 296 breastfeeding women completed a 7-day fluid-specific record. A secondary aim was to estimate the total water intake (TWI; sum of water from fluids and food moisture), and one 24-h recall was performed to determine water intake from food moisture. The median TFI of pregnant and breastfeeding women were 2,250 (1,800-2,800) and 2,360 (1,954-2,968) mL/day, respectively. The largest contributor to TFI was water (72 and 77% for pregnant/breastfeeding women, respectively). Pregnant women to the extent of 42% and 54% of breastfeeding women did not reach the adequate intake (AI) of water from fluids. In pregnant and breastfeeding women, the median water intake from foods was 592 and 613 mL/day, representing 21 and 20% of TWI. Concluding that a high proportion of the pregnant and breastfeeding subjects did not reach the AI of water from fluid, it seems important to put in place actions such as providing education materials and ensuring access to safe water. Moreover, future surveys should dedicate attention to the assessment of fluid intake and hydration status among pregnant and breastfeeding women in other countries.


2016 ◽  
Vol 33 (3) ◽  
Author(s):  
Alexandra Gonçalves ◽  
Joana Silva ◽  
Pedro Moreira ◽  
Patrícia Padrao

Introduction: Accurate estimates of water intake and hydration status in populations are essential to identify populations at risk of dehydration and define strategies to improve standards of water intake. Objective: To evaluate the hydration status and the contribution of food and beverages to the total water intake in a sample of free-living physically active Portuguese elderly.Methods: A sample of 74 individuals (28 men), aged 60 to 83 years, were included in this study. A 24 h urine sample was collected; 24 h urine volume and osmolality were quantifi ed in order to estimate the free water reserve (FWR) used to assess the hydration status. A 24 h food recall corresponding to the day of urine collection was obtained. Food and beverages were grouped according to their nutritional composition, namely water content. The contribution of those groups to total water intake and its association with the hydration status were estimated. Urinary markers and food groups’ contribution to total water intake were compared between sexes and according to the median FWR, using the t-test and Mann Whitney test. Results: Less than 10% of the participants were classifi ed as hypohydrated/at hypohydration risk. Water from food was nearly half of the total water intake (47% in females and 48% in males, p = 0.757). “Water” (22%) and “foods with reduced water content” (19%) were the groups that contributed the most to the total water intake in women and men, respectively. In men, the contribution of “alcoholic beverages” was signifi cantly higher than that of women (10.5% vs1.7%, p < 0.001).Conclusions: Even though most of the study participants were classifi ed as euhydrated, the contribution of water-rich and nutritionally dense food, and non-alcoholic beverages, particularly in men, should be promoted.


2016 ◽  
Vol 104 (6) ◽  
pp. 1554-1561 ◽  
Author(s):  
Asher Y Rosinger ◽  
Hannah G Lawman ◽  
Lara J Akinbami ◽  
Cynthia L Ogden

2021 ◽  
pp. 1-32
Author(s):  
Jean-Pierre Chouraqui ◽  
Simon N. Thornton ◽  
Louise Seconda ◽  
Stavros A. Kavouras

Abstract Hydration is a particular concern for infants and young children due to their greater risk of dehydration. However, studies on their water intakes are scarce. The current survey aimed to analyze total water intake (TWI) in non-breastfed children aged 0.5-35 months compared to the adequate intake (AI) for the same age group set by the EFSA and to examine the different contributors to TWI as well as beverage consumption patterns. Nationally representative data from the Nutri-Bébé cross-sectional survey were used to assess food, beverage, and plain water consumption by age group over three non-consecutive days. With age, median TWI in 1,035 children increased from 732 to 1010 mL/d, without differences between sex, but with a great inter-individual variation, and the percentage of children who did not meet the AI increased from 10% to 88%. Median weight-related TWI decreased from 136.6 to 69.0 mL/kg/d. Among infants, 90% had a ratio of water/energy below the AI, similarly for about 75% of toddlers. Milk and milk products were the main contributors to TWI, while the part of plain water increased gradually to be 25% in the older toddlers, half of which was tap water. The beverage consumption pattern varied in types and timing, with little consumption of juices and sweetened beverages. Vegetables and fruits accounted for 20% of TWI after the age of 6 months. These initial results, showing strong discrepancies between actual and recommended water intakes in young children, should help identify ways to increase children’s water consumption.


2015 ◽  
Vol 54 (S2) ◽  
pp. 27-34 ◽  
Author(s):  
B. Monnerie ◽  
L. G. Tavoularis ◽  
I. Guelinckx ◽  
P. Hebel ◽  
T. Boisvieux ◽  
...  

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