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https://www.readbyqxmd.com/read/27901340/effects-of-a-trail-mountain-race-on-neuromuscular-performance-and-hydration-status-in-trained-runners
#1
Ernest Baiget, Javier Peña, Xantal Borràs, Toni Caparrós, José L López, Francesc Marin, Jordi Coma, Eduard Comerma
BACKGROUND: The aims of this study were (a) to examine the effects of a trail mountain race (TMR) on hydration status and neuromuscular performance of recreational trail runners and (b) to determine the relationship among these parameters, subject's characteristics and competitive performance. METHODS: 35 male recreational trail runners (age, 38.1 ± 9.5 years; height, 177.3 ± 5.8 cm; body mass, 73.8 ± 8.4 kg; mean ± SD) were assessed before and after a 21.1 km TMR...
November 30, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27876808/water-intake-and-urinary-hydration-biomarkers-in-children
#2
S A Kavouras, D Bougatsas, E C Johnson, G Arnaoutis, S Tsipouridi, D B Panagiotakos
BACKGROUND/OBJECTIVES: The aims of the study were as follows: (1) examine fluid intake and urinary hydration markers of children in Greece, (2) determine the calculated relative risk of hypohydration in children who did not meet the recommendations for daily water intake provided by the Institute of Medicine and the European Food Safety Authority compared with those who did and (3) analyze the efficacy of the recommendations as a method to achieve euhydration in children. SUBJECTS/METHODS: One hundred and fifty Greek boys and girls (age 9-13) recorded their fluid intake for 2 consecutive days...
November 23, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27710148/fluid-retention-and-utility-of-practical-hydration-markers-to-detect-3-levels-of-recovery-fluid-intake-in-male-runners
#3
Mary Caitlin Stevenson Wilcoxson, Samantha Louise Johnson, Veronika Pribyslavska, James Mathew Green, Eric Kyle O'Neal
Runners are unlikely to consume fluid during training bouts increasing the importance of recovery rehydration efforts. This study assessed urine specific gravity (USG) responses following runs in the heat with different recovery fluid intake volumes. Thirteen male runners completed 3 evening running sessions resulting in approximately 2,200±300 mL of sweat loss (3.1±0.4% body mass) followed by a standardized dinner and breakfast. Beverage fluid intake (pre/post-breakfast) equaled 1,565/2,093 mL (low; L), 2,065/2,593 mL (moderate; M) and 2,565/3,356 mL (high; H)...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27616716/the-effect-of-storing-temperature-and-duration-on-urinary-hydration-markers
#4
J D Adams, Stavros A Kavouras, Evan C Johnson, Lisa T Jansen, Catalina Capitan-Jimenez, Joseph I Robillard, Andy Mauromoustakos
The purpose of this investigation was to quantify the effects of storage temperature, duration, and the urinary sediment on urinary hydration markers. Thirty-six human urine samples were analyzed fresh and then the remaining sample was separated into 24 separate vials, six in each of the following four temperatures: 22°C, 7°C, -20°C, and -80°C. Two of each sample stored in any given temperature, were analyzed after 1, 2, and 7 days either following vortexing or centrifugation. Each urine sample was analyzed for osmolality (UOsm), urine specific gravity (USG), and urine color (UC)...
September 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27594812/assessment-of-hydration-status-of-elite-young-male-soccer-players-with-different-methods-and-new-approach-method-of-substitute-urine-strip
#5
Nesli Ersoy, Gulgun Ersoy, Mehmet Kutlu
BACKGROUND: The purpose of the study is to determine and compare the hydration status with different methods and determine fluid intake, dehydration percentages and sweat rate of 26 young male soccer players (15 ± 1.2 years) before an important competition. More specifically, the study aims at validating the urine strip and advising the players to use it as an easy and practical method. METHODS: Measurements of urine analysis were taken from the urine sample of the participants before breakfast and conducted for 3 consecutive days before the competition...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27548786/hydration-status-executive-function-and-response-to-orthostatism-following-a-118-km-mountain-race-%C3%A2-are-they-interrelated
#6
I Martínez-Navarro, O Chiva-Bartoll, B Hernando, E Collado, V Porcar, C Hernando
PURPOSE: The present study aimed to explore whether Blood Pressure (BP) and Heart Rate Variability (HRV) responsiveness to orthostatism, jointly with Executive Function (EF) performance, were diminished following an ultraendurance mountain race. Besides, we wanted to assess whether hydration status was related to either performance or the abovementioned alterations. METHODS: Fifty recreational ultraendurance athletes participating in the Penyagolosa Trails CSP115 race (118 km and a total positive elevation of 5439 m) were evaluated before and after the competition...
August 18, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27519184/relationships-between-hydration-biomarkers-and-total-fluid-intake-in-pregnant-and-lactating-women
#7
Amy L McKenzie, Erica T Perrier, Isabelle Guelinckx, Stavros A Kavouras, Giselle Aerni, Elaine C Lee, Jeff S Volek, Carl M Maresh, Lawrence E Armstrong
INTRODUCTION: Previous research established significant relationships between total fluid intake (TFI) and urinary biomarkers of the hydration process in free-living males and females; however, the nature of this relationship is not known for pregnant (PREG) and lactating (LACT) women. PURPOSE: To determine the relationship between urinary and hematological hydration biomarkers with TFI in PREG and LACT. METHODS: Eighteen PREG/LACT (age: 31 ± 3 years, pre-pregnancy BMI: 24...
August 12, 2016: European Journal of Nutrition
https://www.readbyqxmd.com/read/27360856/the-validity-of-urine-color-self-assessment-as-an-index-of-hydration-in-males-2031-board-183-june-2-2-00-pm-3-30-pm
#8
J D Adams, Daniel L Nixon, Cameron T Nichols, Stavros A Kavouras
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27225436/water-loss-intracellular-dehydration-assessed-using-urinary-tests-how-well-do-they-work-diagnostic-accuracy-in-older-people
#9
Lee Hooper, Diane K Bunn, Asmaa Abdelhamid, Rachel Gillings, Amy Jennings, Katie Maas, Sophie Millar, Elizabeth Twomlow, Paul R Hunter, Lee Shepstone, John F Potter, Susan J Fairweather-Tait
BACKGROUND: Water-loss dehydration (hypertonic, hyperosmotic, or intracellular dehydration) is due to insufficient fluid intake and is distinct from hypovolemia due to excess fluid losses. Water-loss dehydration is associated with poor health outcomes such as disability and mortality in older people. Urine specific gravity (USG), urine color, and urine osmolality have been widely advocated for screening for dehydration in older adults. OBJECTIVE: We assessed the diagnostic accuracy of urinary measures to screen for water-loss dehydration in older people...
July 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27093369/monitoring-hydration-status-pre-and-post-training-among-university-athletes-using-urine-color-and-weight-loss-indicators
#10
Marquitta C Webb, Sinead T Salandy, Safiya E Beckford
OBJECTIVE: To investigate the hydration status pre- and post-training among university athletes using urine color and weight loss as indicators. PARTICIPANTS: Participants were 52 university athletes training for campus games in a developing country. METHODS: Pre- and post-training urine specimens were compared with a standard urine color scale. Paired t tests were used to compare urine color and difference in body mass pre- and post-training...
August 2016: Journal of American College Health: J of ACH
https://www.readbyqxmd.com/read/27058557/water-intake-and-hydration-indices-in-healthy-european-adults-the-european-hydration-research-study-ehrs
#11
Olga Malisova, Adelais Athanasatou, Alex Pepa, Marlien Husemann, Kirsten Domnik, Hans Braun, Ricardo Mora-Rodriguez, Juan F Ortega, Valentin E Fernandez-Elias, Maria Kapsokefalou
Hydration status is linked with health, wellness, and performance. We evaluated hydration status, water intake, and urine output for seven consecutive days in healthy adults. Volunteers living in Spain, Germany, or Greece (n = 573, 39 ± 12 years (51.1% males), 25.0 ± 4.6 kg/m² BMI) participated in an eight-day study protocol. Total water intake was estimated from seven-day food and drink diaries. Hydration status was measured in urine samples collected over 24 h for seven days and in blood samples collected in fasting state on the mornings of days 1 and 8...
2016: Nutrients
https://www.readbyqxmd.com/read/26898028/sweat-rate-and-fluid-intake-in-young-elite-basketball-players-on-the-fiba-europe-u20-championship
#12
Milica Vukasinović-Vesić, Marija Andjelković, Tamara Stojmenović, Nenad Dikić, Marija Kostić, Djordje Curcić
BACKGROUND/AIM: Previous investigations in many sports indicated that continued exercise, especially in hot environments, can cause high sweat rate and huge water and electrolyte losses, thus impairing the performance of athletes. Most these studies were conducted during training sessions, but rarely during an official competition. Therefore, the aim of our study was to determine pre- and post-competition hydration, fluid intake and sweat loss of young elite basketball players during the FIBA Europe U20 Championship...
December 2015: Vojnosanitetski Pregled. Military-medical and Pharmaceutical Review
https://www.readbyqxmd.com/read/26731792/effects-of-three-oral-nutritional-supplements-on-human-hydration-indices
#13
Lindsay A Ellis, Brandon A Yates, Amy L McKenzie, Colleen X Muñoz, Douglas J Casa, Lawrence E Armstrong
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)...
August 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/26642041/accuracy-of-urine-color-to-detect-equal-to-or-greater-than-2-body-mass-loss-in-men
#14
Amy L McKenzie, Colleen X Muñoz, Lawrence E Armstrong
CONTEXT: Clinicians and athletes can benefit from field-expedient measurement tools, such as urine color, to assess hydration state; however, the diagnostic efficacy of this tool has not been established. OBJECTIVE: To determine the diagnostic accuracy of urine color assessment to distinguish a hypohydrated state (≥2% body mass loss [BML]) from a euhydrated state (<2% BML) after exercise in a hot environment. DESIGN: Controlled laboratory study...
December 2015: Journal of Athletic Training
https://www.readbyqxmd.com/read/26572890/urine-color-as-an-indicator-of-urine-concentration-in-pregnant-and-lactating-women
#15
Amy L McKenzie, Colleen X Muñoz, Lindsay A Ellis, Erica T Perrier, Isabelle Guelinckx, Alexis Klein, Stavros A Kavouras, Lawrence E Armstrong
AIM: Urine concentration measured via osmolality (U OSM) and specific gravity (U SG) reflects the adequacy of daily fluid intake, which has important relationships to health in pregnant (PREG) and lactating (LACT) women. Urine color (U COL) may be a practical, surrogate marker for whole-body hydration status. PURPOSE: To determine whether U COL was a valid measure of urine concentration in PREG and LACT, and pair-matched non-pregnant, non-lactating control women (CON)...
November 16, 2015: European Journal of Nutrition
https://www.readbyqxmd.com/read/26546812/predictors-of-reporting-success-with-increased-fluid-intake-among-kidney-stone-patients
#16
Sarah Tarplin, Manoj Monga, Karen L Stern, Lipika R McCauley, Carl Sarkissian, Mike M Nguyen
OBJECTIVE: To determine how kidney stone patients' knowledge, behaviors, and preferences toward fluid intake differed from those reporting being successful or unsuccessful at increasing fluid intake for prevention. MATERIALS AND METHODS: Three hundred two kidney stone patients filled out a survey on stone history, fluid intake success, and knowledge, behaviors, and preferences toward fluid intake. Responses were compared between those reporting being very successful at fluid intake and those reporting being not successful or only somewhat successful...
February 2016: Urology
https://www.readbyqxmd.com/read/26479401/endurance-cyclist-fluid-intake-hydration-status-thirst-and-thermal-sensations-gender-differences
#17
Lawrence E Armstrong, Evan C Johnson, Amy L McKenzie, Lindsay A Ellis, Keith H Williamson
This field investigation assessed differences (e.g., drinking behavior, hydration status, perceptual ratings) between female and male endurance cyclists who completed a 164-km event in a hot environment (35 °C mean dry bulb) to inform rehydration recommendations for athletes. Three years of data were pooled to create 2 groups of cyclists: women (n = 15) and men (n = 88). Women were significantly smaller (p < .001) than men in height (166 ± 5 vs. 179 ± 7 cm), body mass (64.6 ± 7.3 vs. 86.4 ± 12.3 kg), and body mass index (BMI; 23...
April 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/26088039/assessing-hydration-in-children-from-science-to-practice
#18
I Guelinckx, A S Frémont-Marquis, E Eon, S A Kavouras, L E Armstrong
Raising children's awareness about their hydration status could be done through a noninvasive biomarker. Urine color (UC) has been validated as a biomarker of hydration in adults and children aged 8-14 years. The aim of this survey was to design and to evaluate the level of understanding and attractiveness of a self-assessment, UC-based hydration tool for children aged 6-11 years. The first phase of the survey consisted of face-to-face interviews during which 84 children identified those graphical elements necessary to understand the hydration message from 6 illustration-based designs containing the UC chart...
2015: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/25977447/quantification-of-chromatographic-effects-of-vitamin-b-supplementation-in-urine-and-implications-for-hydration-assessment
#19
Robert W Kenefick, K R Heavens, W E Dennis, E M Caruso, K I Guerriere, N Charkoudian, S N Cheuvront
Changes in body water elicit reflex adjustments at the kidney, thus maintaining fluid volume homeostasis. These renal adjustments change the concentration and color of urine, variables that can, in turn, be used as biomarkers of hydration status. It has been suggested that vitamin supplementation alters urine color; it is unclear whether any such alteration would confound hydration assessment via colorimetric evaluation. We tested the hypothesis that overnight vitamin B2 and/or B12 supplementation alters urine color as a marker of hydration status...
July 15, 2015: Journal of Applied Physiology
https://www.readbyqxmd.com/read/25905541/validation-of-a-urine-color-scale-for-assessment-of-urine-osmolality-in-healthy-children
#20
Stavros A Kavouras, Evan C Johnson, Dimitris Bougatsas, Giannis Arnaoutis, Demosthenes B Panagiotakos, Erica Perrier, Alexis Klein
AIM: Urine color (UC) is a practical tool for hydration assessment. The technique has been validated in adults, but has not been tested in children. PURPOSE: The purpose of the study was to test the validity of the urine color scale in young, healthy boys and girls, as a marker of urine concentration, investigate its diagnostic ability of detecting hypohydration and examine the ability of children to self-assess UC. METHODS: A total of 210 children participated (age: 8-14 years, body mass: 43...
April 2016: European Journal of Nutrition
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