A 4-d Water Intake Intervention Increases Hydration and Cognitive Flexibility among Preadolescent Children

2019 ◽  
Vol 149 (12) ◽  
pp. 2255-2264 ◽  
Author(s):  
Naiman A Khan ◽  
Daniel R Westfall ◽  
Alicia R Jones ◽  
Macie A Sinn ◽  
Jeanne H Bottin ◽  
...  
Keyword(s):  
Working Memory ◽  
Cognitive Flexibility ◽  
Water Intake ◽  
Repeated Measures ◽  
Cognitive Tasks ◽  
Urine Specific Gravity ◽  
Urinary Markers ◽  
Urine Color ◽  
Significant Difference ◽  
Us Children

ABSTRACT Background Hydration effects on cognition remain understudied in children. This is concerning since a large proportion of US children exhibit insufficient hydration. Objective This study investigated the effects of water intake on urinary markers of hydration and cognition among preadolescents. Methods A 3-intervention crossover design was used among 9- to 11-y-olds [n = 75 (43 males, 32 females); 58.2 ± 28.5 BMI percentile]. Participants maintained their water intake [ad libitum (AL)] or consumed high (2.5 L/d) or low (0.5 L/d) water for 4 d. The primary outcomes were performance on cognitive tasks requiring inhibition, working memory, and cognitive flexibility assessed using a modified flanker, go/no-go, and color-shape switch tasks, respectively. Secondary outcomes included urine hydration indices [i.e., color, urine specific gravity (USG), osmolality] assessed using 24-h urine collected during day 4 of each intervention. Repeated-measures ANOVAs were used to assess intervention effects. Results There was a significant difference in hydration across all 3 interventions. Urine color during the low intervention [median (IQR): 6 (2)] was greater than during AL [5 (2)], and both were greater than during the high intervention [18 (0)] (all P ≤ 0.01). Similarly, osmolality [low (mean ± SD): 912 ± 199 mOsmol/kg, AL: 790 ± 257.0 mOsmol/kg, high: 260 ± 115 mOsmol/kg] and USG [low (mean ± SD): 1.023 ± 0.005, AL: 1.020 ± 0.007, high: 1.005 ± 0.004] during the low intervention were greater during AL, and both were greater than during the high intervention (all P ≤ 0.01). USG and osmolality AL values were related to switch task measures (β: 0.21 to −0.31, P < 0.05). Benefits of the high intervention were observed during the switch task, whereby participants exhibited 34% lower working memory cost relative to the low intervention. No significant changes in cognition were observed for the flanker and go/no-go tasks. Conclusions The water intervention improved urinary markers of hydration and had selective benefits during task switching. Furthermore, children's cognitive flexibility selectively benefits from greater habitual hydration and water intake. This study is registered at clinicaltrials.gov as NCT02816450.

scholarly journals The Effect of Hydration on Cognition in Children: The WITiKids Randomized Controlled Crossover Trial (OR32-08-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Naiman Khan ◽  
Daniel Westfall ◽  
Alicia Jones ◽  
Macie Sinn ◽  
Jeanne Bottin ◽  
...  
Keyword(s):  
Working Memory ◽  
Cognitive Function ◽  
Cognitive Control ◽  
Cognitive Flexibility ◽  
Water Intake ◽  
The United States ◽  
Superior Performance ◽  
Urinary Markers ◽  
Urine Color ◽  
Ad Libitum

Abstract Objectives Previous work in adults has shown that dehydration has negative effects on cognitive function. However, the effect of changes in hydration on cognitive function remain understudied in children. This is relevant since epidemiological data suggests that a large proportion of children in the United States exhibit highly concentrated urine, suggestive of insufficient hydration. This study aimed to determine the effects of changes in daily water intake on urinary markers of hydration and cognitive control among school-aged children. Methods 9–11-year-old children (N = 82) completed a three-intervention crossover water intake intervention where they were asked to either maintain their regular water intake (ad libitum) or consume High [2.5 L/d] or Low [0.5 L/d]) water for 4 consecutive days. Following the interventions, cognitive control tasks requiring inhibition, working memory, and cognitive flexibility were assessed using a modified flanker, Go/NoGo, and color-shape switch tasks. During day 4 of each intervention, children collected their urine over a 24-hour period for urine color, urine specific gravity (USG), and osmolality assessment. Results Hydration differed significantly between interventions. Urine color during the Low intervention was significantly higher than ad libitum and both were significantly greater than High intervention (Low: 6 [median] and 2 [iqr], ad libitum: 5 [median] and 2 [iqr], High: 3 [median] and 0 [iqr], all P ≤ 0.01). Similar intervention effects were observed for osmolality (Low: 912 ± 199, ad libitum: 790 ± 257.0, High: 260 ± 115 mOsmol/kg, all P < 0.001) and USG (Low: 1.023 ± 0.005, ad libitum: 1.020 ± 0.007, High: 1.005 ± 0.004, all P < 0.001). Ad libitumhydration was positively related to switch task performance. Benefits of the High intervention were observed during the switch task whereby participants exhibited lower working memory cost relative to the Low intervention. No significant changes in cognition were observed for the flanker and Go/NoGo tasks. Conclusions Children with better habitual hydration exhibited superior performance during the cognitive flexibility task. Additionally, the 4d water intervention resulted in significant changes in urinary markers of hydration and had selective benefits during task switching. Funding Sources Danone Research, Palaiseau, France.

The Effect of an 8-Week Aerobic Dance Program on Executive Function in Children

2021 ◽  
pp. 003151252110580
Author(s):  
Khawla Zinelabidine ◽  
Yousri Elghoul ◽  
Ghada Jouira ◽  
Sonia Sahli
Keyword(s):  
Working Memory ◽  
Primary School ◽  
Cognitive Flexibility ◽  
Repeated Measures ◽  
Mixed Model ◽  
Primary School Children ◽  
Control Group ◽  
Aerobic Dance ◽  
Digit Recall ◽  
Dance Intervention

In the current study, we examined the effect of an aerobic dance program as part of physical education (PE) classes on aspects of primary school children’s executive functions (EFs) (inhibition, working memory, and cognitive flexibility). Participants were 41 children (21 boys and 20 girls; M age =10.30, SD = 0.50 years, M height = 134.09, SD= 3.9 cm; M weight = 35.61, SD = 7.85 kg) who were divided into an experimental group (EG) and a no-PE control group (CG). The EG followed an aerobic dance intervention as part of their PE program (45 minute sessions two days per week over eight weeks). Participants in both groups performed EF tests before and after the intervention period to evaluate their mental flexibility, inhibition, and working memory. A two-way mixed model repeated measures ANOVA revealed a significant effect of the aerobic dance program on participants’ cognitive flexibility (i.e., on Trails Making Tests B-A times and committed errors) ( p <0.001), and on Stroop measures of inhibition (corrected number of words and corrected errors) ( p <0.001 and p <0.01, respectively), with post-hoc analyses showing an improved performance by the EG in working memory (digit recall score) from pre-test to post-test and in comparsion to the CG ( p < 0.001). Thus, this 8-week aerobic dance program promoted EF development among primary school children.

Effects of Three Oral Nutritional Supplements on Human Hydration Indices

2016 ◽  
Vol 26 (4) ◽  
pp. 356-362 ◽  
Author(s):  
Lindsay A. Ellis ◽  
Brandon A. Yates ◽  
Amy L. McKenzie ◽  
Colleen X. Muñoz ◽  
Douglas J. Casa ◽  
...  
Keyword(s):  
Assessment Tool ◽  
Urine Volume ◽  
Urine Osmolality ◽  
Ease Of Use ◽  
Urine Specific Gravity ◽  
Hydration Status ◽  
Urine Color ◽  
Significant Difference ◽  
Oral Nutritional Supplements ◽  
Double Blinded

Urine color (Ucol) as a hydration assessment tool provides practicality, ease of use, and correlates moderately to strongly with urine specific gravity (Usg) and urine osmolality (Uosm). Indicative of daily fluid turnover, along with solute and urochrome excretion in 24-hr samples, Ucol may also reflect dietary composition. Thus, the purpose of this investigation was to determine the efficacy of Ucol as a hydration status biomarker after nutritional supplementation with beetroot (880 mg), vitamin C (1000 mg), and riboflavin (200 mg). Twenty males (Mean ± SD; age, 21 ± 2 y; body mass, 82.12 ± 15.58 kg; height, 1.77 ± 0.06 m) consumed a standardized breakfast and collected all urine voids on one control day (CON) and 1 day after consuming a standardized breakfast and a randomized and double-blinded supplement (SUP) over 3 weeks. Participants replicated exercise and diet for one day before CON, and throughout CON and SUP. Ucol, Usg, Uosm, and urine volume were measured in all 24-hr samples, and Ucol and Usg were measured in all single samples. Ucol was a significant predictor of single sample Usg after all supplements (p < .05). Interestingly, 24-hr Ucol was not a significant predictor of 24-h Usg and Uosm after riboflavin supplementation (p = .20, p = .21). Further, there was a significant difference between CON and SUP 24-h Ucol only after riboflavin supplementation (p < .05). In conclusion, this investigation suggests that users of the UCC (urine color chart) should consider riboflavin supplementation when classifying hydration status and use a combination of urinary biomarkers (e.g., Usg and Ucol), both acutely and over 24 hr.

scholarly journals FLUID BALANCE DURING TAEKWONDO TRAINING

2021 ◽  
Vol 27 (1) ◽  
pp. 70-74
Author(s):  
Felipe Gomes Belfort ◽  
Paulo Roberto dos Santos Amorim ◽  
Carlos Enrique Silva ◽  
Cassia Farias Fernandes Gonçalves ◽  
Priscila Rita Niquini ◽  
...  
Keyword(s):  
Water Intake ◽  
Training Session ◽  
Urine Specific Gravity ◽  
Hydration Status ◽  
Fluid Loss ◽  
Level Of Evidence ◽  
Warm Up ◽  
Significant Difference ◽  
Before And After ◽  
Ad Libitum

ABSTRACT Introduction Dehydration has been described as one of the main factors of reduced performance in combat sports activities, leading to death in extreme cases. Objective To investigate the pre-training hydration status and changes in fluid homeostasis during two taekwondo training sessions. Methods Eighteen male college athletes (age 22.6 ± 3.37 years) were assessed. The study design aimed to reproduce the conditions of a 90-minute taekwondo training session, divided into three stages: a) warm-up exercises (20 min); b) poomsae (30 min) and c) technical training (40 min). The athletes had ad libitum water intake during training. To assess the hydration status we considered body mass (BM), the amount of liquid consumed and urine output, which enabled us to establish absolute and relative fluid loss in kg and percentage as well as the sweating rate. We also considered urine specific gravity (USG), urine color (U-COL), and subjective sensation of thirst (Sthirst) before and after the training session. Pre- and post-training results were compared separately in each session and between sessions. Results There was a significant difference (P<0.05) in pre-training BM between the two days of training. There was a significant difference (P<0.05) in the final BM on both days of the experiment. Most subjects had relative dehydration below 2%. A significant difference (P<0.05) was recorded pre and post training for U-COL and Sthirst, with the highest rates obtained at the end of each session. Participants always started training at a low dehydration status (USG >1,020g.ml-1). Conclusions The athletes tended to start the training sessions in dehydration status, which increases over the course of the training. Ad libitum water intake was not sufficient to balance fluid loss. Changes in fluid levels between sessions were similar. Level of Evidence II; Therapeutic Studies Investigating the Results Level of Treatment.

scholarly journals Increased Water Viscosity Enhances Water Intake and Reduces Risk of Calcium Oxalate Stone Formation in Cats

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 2110
Author(s):  
Jean A. Hall ◽  
Melissa A. Vanchina ◽  
Blair Ogleby ◽  
Dennis E. Jewell
Keyword(s):  
Water Intake ◽  
Repeated Measures ◽  
Stone Formation ◽  
Urine Specific Gravity ◽  
Study Phase ◽  
Crystal Formation ◽  
Water Type ◽  
Water Viscosity ◽  
Adult Cats ◽  
Complete Blood Counts

The purpose of this study is to determine if water with increased viscosity results in increased water intake, thus lowering the risk of urolithiasis in cats. Twelve healthy adult cats were fed pre-trial standard dry maintenance food for 1 week and then randomized into two groups for the study phase. The cats continued to receive the same food but were provided either control (deionized) water or viscous (1% methylcellulose) water for two months and then switched to the other water type for two months in a cross-over study design with repeated measures. Complete blood counts, serum chemistry profiles, and urinalysis were performed at the initiation of the study and again at 1, 2, 3, and 4 months. Daily water consumption and energy intake for each cat were recorded. Body weights were assessed weekly. Cats consuming 1% methylcellulose water with increased viscosity had increased water intake (p < 0.001; 25% and 21% higher at 28 and 56 days, respectively). Increased consumption of water resulted in lower urine specific gravity (p = 0.04), serum creatinine (p = 0.02), and blood urea nitrogen (p = 0.002) concentrations (without changing serum albumin, glucose, and calcium concentrations or serum osmolality) and decreased urine calcium concentration (p = 0.01) compared with cats consuming control water. In addition, the increased water intake increased (p = 0.05) resistance to oxalate crystal formation.

scholarly journals Comparing the Effectiveness of Software-based vs. Non-soft Packages of Working Memory and Selective Attention

2020 ◽  
Vol 8 (4) ◽  
pp. 277-286
Author(s):  
Nafiseh Tabatabaei ◽  
◽  
Mohammad Ali Nadi ◽  
Ilnaz Sajjadian ◽  
◽  
...  
Keyword(s):  
Working Memory ◽  
Selective Attention ◽  
Repeated Measures ◽  
Control Group ◽  
Case Group ◽  
Control Group Design ◽  
First Case ◽  
Significant Difference ◽  
Post Test

Objective: The present study aimed to compare the effects of the non-computerized training package of Working Memory (WM) and selective attention with Captain’s Log software on the components of WM. Methods: This was a quasi-experimental study with a non-random targeted sampling method, and pre-test, post-test, follow-up, and a control group design. A sample of 150 cases aged 13 to15 years diagnosed with Temporal Lobe Epilepsy (TLE) referring to neurology clinics was selected and randomly divided into two case groups (n=15/group) and a control group (n=15). The non-computerized package was performed in 15 one-hour sessions for 4 weeks in the first case group. Besides, the computerized package was provided in 15 sessions (45 minutes each) for 4 weeks in the second case group; however, the control group received no training. All WM components were examined in the pre-test, post-test, and follow-up (3 months after post-test) steps in all study groups. Results: The repeated-measures Analysis of Variance (ANOVA) data indicated a significant difference in the mean scores of the components of WM in the first case group, compared to the second case group and the controls (P<0.05). Conclusion: The non-computerized package of WM and selective attention were significantly more effective on the WM components, compared to the Captain’s Log computerized package.

scholarly journals Effects of Tai Chi on the Executive Function and Physical Fitness of Female Methamphetamine Dependents: A Randomized Controlled Trial

2021 ◽  
Vol 12 ◽  
Author(s):  
Shen Menglu ◽  
Liu Ruiwen ◽  
Yang Suyong ◽  
Zhu Dong
Keyword(s):  
Working Memory ◽  
Physical Fitness ◽  
Cognitive Flexibility ◽  
Repeated Measures ◽  
Tai Chi ◽  
Controlled Trial ◽  
Exercise Group ◽  
Control Group ◽  
Main Effect ◽  
Back Task

Purpose: Exercise improves the health and mental status of drug dependents. The way by which Tai Chi (TC) as a special exercise treatment affects executive functions (EFs) of methamphetamine (MA) dependents is yet to be established. This study aimed to explore the effects of TC on the EFs and physical fitness of MA dependents.Methods: A total of 76 female MA dependents were randomly assigned to the exercise and control groups. The exercise group underwent three 60-min sessions of TC training per week for 12 weeks. The control group was trained with conventional exercises including the 9th Guang Bo Ti Cao and square dance. Physical fitness and EF assessments that evaluated inhibitory control (IC, go/no-go task), working memory (3-back task) and cognitive flexibility (switching task) were performed at baseline and at 12 weeks. A repeated-measures ANOVA was applied to analyze the differences of group and time.Results: The exercise group showed decreased response time (RT) with a significant main effect of time on the go/no-go task [F(1, 68) = 9.6, p &lt; 0.05]. The interaction effect between time and group was significant on accuracy [F(1, 61) = 4.73, p &lt; 0.05], and the main effect of time was significant on RT [F(1, 61) = 4.66, p &lt; 0.05] in the 3-back task of the exercise group. Significant changes in BMI [F(1, 68) = 19.57, p &lt; 0.05], vital capacity [F(1, 68) = 6.00, p &lt; 0.05], and systolic blood pressure [F(1, 68) = 6.11, p &lt; 0.05] were observed in the exercise group.Conclusion: These findings showed that 3 months of TC training can improve the IC and maintain the working memory and cognitive flexibility of MA dependents. Other data implied that TC may improve the physical fitness of MA dependents.Clinical Trial Registration:http://www.chictr.org.cn/, ChiCTR1900022091.

Investigating the Effect of Cognitive-behavioral Stress Management on Occupational Performance among Women with Breast Cancer

2020 ◽  
Vol 16 (2) ◽  
pp. 152-159
Author(s):  
Arezoo Shayan ◽  
Mansoureh Refaei ◽  
Farkhondeh Jamshidi
Keyword(s):  
Breast Cancer ◽  
Stress Management ◽  
Repeated Measures ◽  
Intervention Group ◽  
Performance Measure ◽  
Cognitive Behavioral ◽  
Occupational Performance ◽  
Cognitive Behavioral Stress Management ◽  
Behavioral Stress ◽  
Significant Difference

Background: Treatment of breast cancer can be accompanied by long-term consequences affecting women’s participation in many tasks. Objective: This study aimed to assess the effect of cognitive behavioral stress management (CBSM) program on occupational performance of women with breast cancer. Methods: In this randomized clinical trial, conducted between Feb 3 and Oct 26, 2016, 104 women with breast cancer who had referred to Imam Khomeini clinic in Hamadan, and who fulfilled the inclusion criteria (20-60 years old, married, suffering from grade 1-3 breast cancer with a history of recent surgery) were enrolled. They were randomly divided into two groups of 52 using a permuted block size of four. The intervention group took part in four 60-minute sessions of CBSM over four weeks. The study data were collected using a demographic information form and the Canadian Occupational Performance Measure. The statistical analyst was masked to intervention allocation. The data were analyzed using descriptive statistics, paired t-test, and repeated measures ANOVA. Results: A significant difference was observed between the two groups regarding the mean scores of occupational performance (p=0.02) and satisfaction (p=0.005) after the intervention. Each variable was measured at three time points (before the intervention, immediately and 2 weeks after intervention). A significant difference was observed in the two groups’ mean scores of performance (p=0.026) and satisfaction (p=0.01), irrespective of the time of assessment. Conclusion: The CBSM program promoted the occupational performance immediately and two weeks after the intervention in women with breast cancer. This technique can be used as a complementary method alongside medical therapies in oncology centers.

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