Palatable Flavoured Fluids without Carbohydrates and Electrolytes Do Not Enhance Voluntary Fluid Consumption in Male Collegiate Basketball Players in the Heat

Using palatable fluids to enhance drinking in athletes who display insufficient compensatory hydration behaviour may mitigate the risks of hypohydration and performance deficits. However, it is unclear whether flavour can independently enhance fluid consumption. This study examined the effects of a colourless, artificially sweetened flavoured water (FW), without carbohydrates and with negligible amounts of sodium, compared to plain water (W) on fluid consumption in male collegiate basketball players in a practical game setting. Eighteen male basketball players (age 23.1 ± 1.3 years) played a 3v3 basketball small-sided game. The players were randomly assigned to consume either FW or W. Pre-game urine-specific gravity, fluid consumption, body mass, and hedonic taste perceptions were assessed. Basketball performance was analysed through notational analysis. Ratings of perceived exertion and thirst were recorded at pre-, post-game, and at each rest period. Heart rate was recorded throughout the gameplay. Despite significantly higher hedonic ratings for FW than W (6.78 ± 0.83 vs. 5.56 ± 1.33, p = 0.033, d = 1.36), there were no significant differences in fluid consumption (1083 ± 32 mL vs. 1421 ± 403 mL, p = 0.068, d = 0.92). Our result highlighted that using palatable fluids as a strategy to increase fluid consumption during high-intensity gameplay in the heat may not be effective if used without carbohydrates and electrolytes. Practitioners could consider both fluid palatability and composition in establishing a hydration plan for athletes.

Passive Front Propagation in Intense Turbulence: Early Transient and Late Statistically Stationary Stages of the Front Area Evolution

The influence of statistically stationary, homogeneous isotropic turbulence (i) on the mean area of a passive front propagating in a constant-density fluid and, hence, (ii) on the mean fluid consumption velocity u¯T is explored, particularly in the case of an asymptotically high turbulent Reynolds number, and an asymptotically high ratio of the Kolmogorov velocity to a constant speed u0 of the front. First, a short early transient stage is analyzed by assuming that the front remains close to a material surface that coincides with the front at the initial instant. Therefore, similarly to a material surface, the front area grows exponentially with time. This stage, whose duration is much less than an integral time scale of the turbulent flow, is argued to come to an end once the volume of fluid consumed by the front is equal to the volume embraced due to the turbulent dispersion of the front. The mean fluid consumption velocity averaged over this stage is shown to be proportional to the rms turbulent velocity u′. Second, a late statistically stationary regime of the front evolution is studied. A new length scale characterizing the smallest wrinkles of the front surface is introduced. Since this length scale is smaller than the Kolmogorov length scale ηK under conditions of the present study, the front is hypothesized to be a bifractal with two different fractal dimensions for wrinkles larger and smaller than ηK. Finally, a simple scaling of u¯T∝u′ is obtained for this late stage as well.

A Case-Series Observation of Sweat Rate Variability in Endurance-Trained Athletes

Adequate fluid replacement during exercise is an important consideration for athletes, however sweat rate (SR) can vary day-to-day. The purpose of this study was to investigate day-to-day variations in SR while performing self-selected exercise sessions to evaluate error in SR estimations in similar temperature conditions. Thirteen endurance-trained athletes completed training sessions in a case-series design 1x/week for a minimum 30 min of running/biking over 24 weeks. Body mass was recorded pre/post-training and corrected for fluid consumption. Data were split into three Wet-Bulb Globe Thermometer (WBGT) conditions: LOW (<10 °C), MOD (10–19.9 °C), HIGH (>20 °C). No significant differences existed in exercise duration, distance, pace, or WBGT for any group (p > 0.07). Significant differences in SR variability occurred for all groups, with average differences of: LOW = 0.15 L/h; MOD = 0.14 L/h; HIGH = 0.16 L/h (p < 0.05). There were no significant differences in mean SR between LOW-MOD (p > 0.9), but significant differences between LOW-HIGH and MOD-HIGH (p < 0.03). The assessment of SR can provide useful data for determining hydration strategies. The significant differences in SR within each temperature range indicates a single assessment may not accurately represent an individual’s typical SR even in similar environmental conditions.

Evaluating Frozen Strawberries as a Strategy for Thirst Management in Patients with Congestive Heart Failure (CHF)

INTRODUCTION: Thirst sensation in Congestive Heart Failure (CHF) patients is caused by diuretic administration and fluid consumption limitation. Unhandled thirst sensation leads to a disobedient patient in fluid consumption limitation that causes the patient condition to worsen. This research aimed to analyse the frozen strawberries administration's effects on the thirst sensation in a patient with CHF . MATERIAL AND METHOD: The method used was a quasi-experiment with a pre-test and post-test control group design. The number of respondents was 34 patients divided into two groups: 17 respondents in the intervention group and 17 respondents in the control group. The sampling technique was stratified random sampling based on NYHA classification in the respondents. Frozen strawberries were given to the intervention group, while ice cubes were given to the control group. All the data were analyzed using a t-test.RESULT:The results showed that the mean score of the thirst intensity of the intervention and control group was 4.44 and 2.35, respectively. The independent t-test of the mean difference of thirst intensity pre and post-test between the intervention and control groups was p=0.001. According to the paired t-test analysis, the thirst intensity score between pre-test and post-test was p<0.001, from moderate to low thirst intensity. CONCLUSION:Frozen strawberries were statistically effective in reducing the thirst intensity in a patient with CHF.

The volume conjugate in progressive metamorphism

&lt;p&gt;Volume changes during metamorphic reactions are key contributors to the physical changes of crystalline rocks. Assessing dehydration or hydration reactions in terms of conjugate &lt;em&gt;V&amp;#8211;T&lt;/em&gt; pseudosections provides indicators of transient departures in hydrostatic pressure and their impact on observed mineral equilibria. The expansion in volume of major dehydration events such as the breakdown of lawsonite or chlorite delineate zones of fluid overpressure that generate connectivity via fracturing. Net compressional reactions represent sinks for fluid consumption and the focussing of strain. The capacity of metamorphic rocks to generate or consume fluid along portions of the &lt;em&gt;P&amp;#8211;T&amp;#8211;V&lt;/em&gt; path exerts a fundamental control on the distribution of stresses in the crust and the observed mineral assemblages. Coupling a phase equilibria approach to mechanical modelling provides a quantitative framework to assess these changes in fluid pressure that can be compared to prominent case studies in rocks from New Caledonia and New Zealand.&lt;/p&gt;

Assessment of the impact of COVID-19 pandemic on emotional and nutritional status of university athletes

Background and Study Aim. The current study was carried out to analyze the impact of COVID-19 pandemic on the emotional state and nutritional behavior of university athletes. Material and Methods. This research was carried out during the first wave of COVID-19 in Turkey. A total of 334 (162 female and 172 male) athletes who are undergraduate students in the faculties of sports sciences of universities participated in the study. Their mean age was 21.46 ± 3.7. The Emotional Eating Scale (EES) was used to determine the nutritional behavior of the participants and The Profile of Mood States (POMS) scale was used to determine their emotional state. The Chi-square and Cross-tabulation tests were used for the statistical analysis of categorical variables. Mann Whitney U test was used for the analysis of continuous variables, and Spearman Sequence Correlation test protocols were used for correlation analysis. Results. The results of the statistical analysis revealed that there was a significant increase in the amount of fluid consumption of elite athletes. There was a significant relationship between negative mood and emotional eating sub-assessment (p <0.05). However, it was found that there was no significant difference between total and subscale scores of amateur and elite athletes (p >0.05). Conclusion. As a result of the research, it was seen that elite and amateur athletes did not have a significant difference in emotional eating and mood status, except for the amount of fluid consumption. The increase in negative emotions of university athletes is an important factor that increased their emotional eating behavior.

Fluid consumption, hydration status, and its associated factors: a cross sectional study among medical students in Palembang, Indonesia

Background: Adequate fluid consumption and hydration status of students become a special concern because being dehydrated by just 1%-2% can impair cognitive performance. The objectives of this study were to assess the daily fluid consumption, and analyze the correlation of fluid consumption and other associated factors with hydration status of medical students in Universitas Sriwijaya.Methods: A total of 93 medical students in Universitas Sriwijaya were recruited to complete a 7-day cross-sectional study. Subjects were asked to complete a self-administered 7-day-24-hours fluid record and provide first morning urine sample on the last day. Gender information was collected. Physical activity was evaluated by self-administered long version of IPAQ. Body mass index was calculated using body weight and body height measurement. Urine specific gravity was determined by urinometer. The 7-day-24-hours fluid record and 1-day-24-hours urine specific gravity were calculated and analyzed.Results: Majority of the subjects were well hydrated, while 10.8% were slightly dehydrated, 6.5% were moderately dehydrated and 9.7% were severely dehydrated. The average of daily fluid consumption was 1789.28 (989.3-2930) mL. Coefficient correlation of fluid consumption from beverages with urine specific gravity was -0.651 (p=0.00) by Pearson correlation test. The hydration status showed no association with gender, physical activity and body mass index.Conclusions: Most subjects in this study were well hydrated. A strong association was found between fluid consumption and hydration status. It was feasible to use daily fluid consumption from beverages to predict hydration status.