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urine color hydration

Amanda M J Ferreira, Luiz F Farias-Junior, Thaynan A A Mota, Hassan M Elsangedy, Aline Marcadenti, Telma M A M Lemos, Alexandre H Okano, Ana P T Fayh
The aim of this study was to investigate whether carbohydrate mouth rinse (CMR) improves physical performance of cyclists during a 30-km time trial test and its influence on water balance compared to other strategies of fluid intake. Eleven recreationally trained male cyclists completed a 30 km time trial cycle ergometer under three experimental interventions: (a) CMR, (b) drinking to replace all weight loss (DWL), and (c) drinking "ad libitum" (DAL). Time to complete the 30 km time trial, heart rate, average power, velocity, weight loss, urine color, urine density and pH were evaluated...
June 2018: Journal of Sports Science & Medicine
Kate S Early, Conrad P Earnest, Bailey Theall, Nathan P Lemoine, Brian Harrell, Neil M Johannsen
Chronic dehydration (DEH) and heat stress combined with poor cardiovascular (CV) health may influence physiological responses to exercise. We examined the effects of free-living induced hypo-hydration on physiological responses to exercise in a heated environment and whether resting CV health is related to these changes. Participants (N = 16, 20.6 ± 1.2 years) were randomized to 3 days of voluntary fluid restriction (DEH) or intake (hydration [HYD]) followed by an exercise bout. CV health was assessed by flow-mediated dilation (FMD), pulse wave analysis, and heart rate variability (HRV)...
April 2018: Physiological Reports
Julie K DeMartini-Nolan, Jessica L Martschinske, Douglas J Casa, Rebecca M Lopez, Rebecca L Stearns, Matthew S Ganio, Eric Coris
Debate exists regarding the influence of intensity and hydration on body temperature during American football. The purpose of this study was to observe body core temperature responses with changes in intensity and hydration. Twenty-nine male football players (age=21±1y, height=187±9 cm, mass=110.1±23.5 kg, body mass index (BMI)=31.3±5.0, and body surface area (BSA)=2.34±0.27m2) participated in eight days of practice in a warm environment (WBGT:29.6±1.6°C). Participants were identified as Starters (S;n=12) or Non-Starters (NS;n=17) and Linemen (L;n=14) or Non-Linemen (NL;n=15)...
November 27, 2017: Journal of Strength and Conditioning Research
Na Zhang, Songming Du, Mengqi Zheng, Zhenchuang Tang, Ruixia Yan, Yitang Zhu, Guansheng Ma
BACKGROUND AND OBJECTIVES: To examine the association between quantified urine color and urine osmolality, and its validity in distinguishing hydration status among college men in Hebei, China. METHODS AND STUDY DESIGN: Sixty-eight college men aged 18~25 years completed a cross-sectional study. All participants were asked to complete a 24-h fluid intake record to estimate fluid intake from beverages after anthropometric measurements. The foods eaten by participants were weighed to assess fluid intake from foods...
2017: Asia Pacific Journal of Clinical Nutrition
Erica T Perrier
Over the past 10 years, literature on hydration biomarkers has evolved considerably - from (de)hydration assessment towards a more global definition of biomarkers of hydration in daily life. This shift in thinking about hydration markers was largely driven by investigating the differences that existed between otherwise healthy individuals whose habitual, ad-libitum drinking habits differ, and by identifying physiological changes in low-volume drinkers who subsequently increase their water intake. Aside from obvious differences in urinary volume and concentration, a growing body of evidence is emerging that links differences in fluid intake with small, but biologically significant, differences in vasopressin (copeptin), glomerular filtration rate, and markers of metabolic dysfunction or disease...
2017: Annals of Nutrition & Metabolism
Marion Rigaud, Camila Sevalho Corçao, Erica T Perrier, Sabine Boesen-Mariani
BACKGROUND: Pregnant and breastfeeding women experience great changes in their total body water content and water dynamics. To support the accretion of total body water during pregnancy and compensate for the water lost through breast milk during breastfeeding, increased adequate intakes (AI) for total water have been established by various health authorities. Despite this widespread advice, several studies suggest that pregnant and breastfeeding women do not meet the AI for total water, suggesting the need to raise women's awareness on the importance of adequate water intake, particularly during pregnancy and breastfeeding, as well as to provide them with a simple means of monitoring their hydration on a day-to-day basis...
2017: Annals of Nutrition & Metabolism
Amy L McKenzie, Lawrence E Armstrong
BACKGROUND: Urine osmolality (UOSM) reflects the renal regulation of excess fluid or deficit fluid, and therefore, serves as a marker of hydration status. Little is known about monitoring hydration in pregnant and lactating women despite significant physiological challenges to body water balance during that time. Therefore, we designed a study to assess if urine color (UCOL), an inexpensive and practical method, was a valid means of assessing urine concentration. Twenty-four hour UCOL was significantly correlated with 24 h UOSM in all women: pregnant, lactating, and control (r = 0...
2017: Annals of Nutrition & Metabolism
Neele R Hoerner, Kirsten Domnik, Karsten Koehler, Wilhelm Schaenzer, Hans Braun
Little is known about whether athletes follow hydration guidelines. The objective of the present study was to assess fluid status in female soccer players in a hot and humid environment, and to assess the effect of an intervention aimed at preventing players from exercising in a dehydrated state. We hypothesized that following the intervention, players would exhibit improved hydration status, as indicated by greater voluntary fluid intake and improved hydration markers. Ten female collegiate soccer players (20±1yrs...
April 7, 2017: International Journal of Sport Nutrition and Exercise Metabolism
Ernest Baiget, Javier Peña, Xantal Borràs, Toni Caparrós, José L López, Francesc Marin, Jordi Coma, Eduard Comerma
BACKGROUND: The aims of this study were to examine the effects of a trail mountain race (TMR) on hydration status and neuromuscular performance of recreational trail runners, and to determine the relationship among these parameters, subject's characteristics and competitive performance. METHODS: Thirty-five male recreational trail runners (age 38.1±9.5 years; height 177.3±5.8 cm; body mass 73.8±8.4 kg) were assessed before and after a 21.1-km TMR. Hydration status (urine color [Ucol] and body mass [BM]) and neuromuscular performance (countermovement jump [CMJ] and rebound jumps [RJ]) were assessed...
January 2018: Journal of Sports Medicine and Physical Fitness
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...
April 2017: European Journal of Clinical Nutrition
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/postbreakfast) equaled 1,565/2,093 ml (low; L), 2,065/2,593 ml (moderate; M) and 2,565/3,356 mL (high; H)...
April 2017: International Journal of Sport Nutrition and Exercise Metabolism
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)...
February 2017: International Journal of Sport Nutrition and Exercise Metabolism
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
Ignacio Martínez-Navarro, Oscar Chiva-Bartoll, Barbara Hernando, Eladio Collado, Vicente Porcar, Carlos Hernando
Martínez-Navarro, I, Chiva-Bartoll, O, Hernando, B, Collado, E, Porcar, V, and Hernando, C. Hydration status, executive function and response to orthostatism after a 118-km mountain race: are they interrelated? J Strength Cond Res 32(2): 441-449, 2018-The present study aimed to explore whether blood pressure (BP) and heart rate (HR) variability (HRV) responsiveness to orthostatism, jointly with executive function (EF) performance, was diminished after an ultra-endurance mountain race. Besides, we wanted to assess whether hydration status was related to either performance or the abovementioned alterations...
February 2018: Journal of Strength and Conditioning Research
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...
September 2017: European Journal of Nutrition
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
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
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
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...
April 6, 2016: Nutrients
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
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