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https://www.readbyqxmd.com/read/29757055/urine-specific-gravity-as-a-practical-marker-for-identifying-sub-optimal-fluid-intake-of-runners-12-h-post-exercise
#1
Eric Kyle O'Neal, Samantha Louise Johnson, Brett Alan Davis, Veronika Pribyslavska, Mary Caitlin Stevenson-Wilcoxson
The legitimacy of urine specific gravity (USG) as a standalone measure to detect hydration status has recently been challenged. As an alternative to hydration status, the purpose of this study was to determine the diagnostic capability of using the traditional USG marker of >1.020 to detect insufficient recovery fluid consumption with consideration for moderate versus high sweat losses (2.00-2.99 or > 3% body mass respectively). Adequate recovery fluid intake (ARFI) was operationally defined as ≥100% beverage fluid intake plus food water from 1 or 2 meals and a snack...
May 14, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29748651/advances-in-assessing-body-composition-during-pregnancy
#2
REVIEW
Jasper Most, Kara Lynn Marlatt, Abby Duhé Altazan, Leanne Maree Redman
The prevalence of excess gestational weight gain is increasing worldwide and is associated with pregnancy complications, including gestational diabetes mellitus, pre-eclampsia, preterm birth, macrosomia, and development of obesity in offspring. Whereas gestational weight gain positively correlates with the gain in fat mass (FM), fat-free mass (FFM) gain is relatively consistent across pregnancies. Commonly used methods to assess body composition include anthropometry, densitometry (air displacement plethysmography, underwater weighing), and hydrometry (isotope dilution, bioimpedance analysis)...
May 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29746803/urine-specific-gravity-as-an-indicator-of-dehydration-in-olympic-combat-sport-athletes-considerations-for-research-and-practice
#3
Damir Zubac, Reid Reale, Hrvoje Karnincic, Anamaria Sivric, Igor Jelaska
Urine specific gravity (USG ) is the most commonly reported biochemical marker used in research and applied settings to detect fluid deficits in athletes, including those participating in combat sports. Despite the popularity of its use, there has been a growing debate regarding the diagnostic accuracy and the applicability of USG in characterizing whole-body fluid status and fluctuations. Moreover, recent investigations report universally high prevalence of hypohydration (∼90%) via USG assessment in combat sport athletes, often in spite of stable body-mass...
May 10, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29743767/pressure-ulcer-and-nutrition
#4
REVIEW
Seied Hadi Saghaleini, Kasra Dehghan, Kamran Shadvar, Sarvin Sanaie, Ata Mahmoodpoor, Zohreh Ostadi
Pressure ulcers can diminish global life quality, contribute to rapid mortality in some patients and pose a significant cost to health-care organizations. Accordingly, their prevention and management are highly important. Nutritional deprivation and insufficient dietary intake are the key risk factors for the development of pressure ulcers and impaired wound healing. Unplanned weight loss is a major risk factor for malnutrition and pressure ulcer development. Suboptimal nutrition interferes with the function of the immune system, collagen synthesis, and tensile strength...
April 2018: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29708859/bioimpedance-patterns-and-bioelectrical-impedance-vector-analysis-biva-of-road-cyclists
#5
Andrea Giorgi, Maurizio Vicini, Luca Pollastri, Erica Lombardi, Emilio Magni, Andrea Andreazzoli, Marco Orsini, Marco Bonifazi, Henry Lukaski, Hannes Gatterer
Bioelectrical impedance vector-analysis (BIVA) describes cell-mass, cell function and hydration status of an individual or a group. The goal of the present investigation was to provide bioelectrical impedance data for 525 male road cyclists (155 professionals, 79 elite, 59 elite-youth, and 232 amateurs) at the time of their optimal performance level. Data were plotted on the resistance-reactance (R-Xc) graph to characterize cyclists group vectors using BIVA. Compared to the general male population, the mean vector position of the road cyclists indicates a higher body cell mass (BCM) and phase angle (p<0...
April 30, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29707541/personalized-hydration-strategy-attenuates-the-rise-in-heart-rate-and-in-skin-temperature-without-altering-cycling-capacity-in-the-heat
#6
Denise de Melo-Marins, Ana Angélica Souza-Silva, Gabriel Lucas Leite da Silva-Santos, Francisco de Assis Freire-Júnior, Jason Kai Wei Lee, Orlando Laitano
The optimal hydration plan [i.e., drink to thirst, ad libitum (ADL), or personalized plan] to be adopted during exercise in recreational athletes has recently been a matter of debate and, due to conflicting results, consensus does not exist. In the present investigation, we tested whether a personalized hydration strategy based on sweat rate would affect cardiovascular and thermoregulatory responses and exercise capacity in the heat. Eleven recreational male cyclists underwent two familiarization cycling sessions in the heat (34°C, 40% RH) where sweat rate was also determined...
2018: Frontiers in Nutrition
https://www.readbyqxmd.com/read/29685828/influence-of-cold-water-immersion-on-recovery-of-elite-triathletes-following-the-ironman-world-championship
#7
Rebecca L Stearns, Julie K Nolan, Robert A Huggins, Carl M Maresh, Colleen X Munõz, Kelly D Pagnotta, Brittanie M Volk, Douglas J Casa
OBJECTIVES: Cold water immersion (CWI) has been widely used for enhancing athlete recovery though its use following an Ironman triathlon has never been examined. The purpose of this paper is to determine the influence of CWI immediately following an Ironman triathlon on markers of muscle damage, inflammation and muscle soreness. DESIGN: Prospective cohort study. METHODS: Thirty three (22 male, 11 female), triathletes participating in the Ironman World Championships volunteered to participate (mean±SD: age=40±11years; height=174...
January 31, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29655777/body-composition-evaluated-by-body-mass-index-and-bioelectrical-impedance-vector-analysis-in-women-with-rheumatoid-arthritis
#8
Juan Antonio Pineda-Juárez, Mariel Lozada-Mellado, Midori Ogata-Medel, Andrea Hinojosa-Azaola, Cira Santillán-Díaz, Luis Llorente, Arturo Orea-Tejeda, Jorge Alcocer-Varela, Rolando Espinosa-Morales, Marco González-Contreras, Lilia Castillo-Martínez
BACKGROUND: Rheumatoid arthritis (RA) is a complex inflammatory disease that modifies body composition. Although body mass index (BMI) is one of the clinical nutrition tools widely used to assess indirectly nutritional status, it is not able to identify these body alterations. Bioelectrical Vector Analysis (BIVA) is an alternative method to assess hydration and body cell mass of patients with wasting conditions. OBJECTIVE: To investigate the differences in nutrition status according to BMI groups (normal, overweight and obesity) and BIVA classification (cachectic and non-cachectic) in women with RA...
February 12, 2018: Nutrition
https://www.readbyqxmd.com/read/29600103/report-of-a-lung-carcinoma-extended-to-the-left-atrium-through-pulmonary-vein
#9
Federico Cipriano, Lycio U Dessoti, Alfredo José Rodrigues, Walter Vilella de Andrade Vicente, Fernando Chahud, Paulo Roberto B Evora
Lung cancers may extend along or grow through the pulmonary veins to invade or lie within the left atrium (LA). A 62-year-old man, previously healthy, presented with 1-month ventilatory-independent right hemithorax back pain, dry cough and large effort dyspnea. He also referred weight loss of 12 kg in 10 months and denied hemoptysis. As antecedents, he smoked for 40 years and moderate daily alcoholism. On physical examination, the patient was in good general condition, hydrated and regular respiration at rest [blood pressure (BP) =120/80 mmHg; heart rate (HR) =90 bpm; respiratory rate (RR) =16 rpm]...
January 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29520564/fluid-intake-restores-retinal-blood-flow-early-after-exhaustive-exercise-in-healthy-subjects
#10
Tsukasa Ikemura, Katsuhiko Suzuki, Nobuhiro Nakamura, Koichi Yada, Naoyuki Hayashi
PURPOSE: It remains unclear whether rehydration restores retinal blood flow reduced by exhaustive exercise. We investigated the effect of fluid intake on retinal blood flow after exhaustive exercise. METHODS: Blood flow in the inferior (ITRA) and superior temporal retinal arterioles (STRA) was measured before and after incremental cycling exercise until exhaustion in 13 healthy males. After the exercise, the subjects rested without drinking (control condition: CON) or with drinking an electrolyte containing water (rehydrate condition: REH) and were followed up for a period of 120 min...
May 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29509643/dehydration-impairs-cycling-performance-independently-of-thirst-a-blinded-study
#11
J D Adams, Yasuki Sekiguchi, Hyun-Gyu Suh, Adam D Seal, Cameron A Sprong, Tracie W Kirkland, Stavros A Kavouras
PURPOSE: The aim of the present study was to examine the effect of dehydration on exercise performance independently of thirst with subjects blinded of their hydration status. METHODS: Seven male cyclists (weight: 72±9 kg, body fat: 14±6%, VO2peak: 59.4±6 ml[BULLET OPERATOR]kg·min) exercised for 2 hours on a cycle ergometer at 55% VO2peak, in a hot-dry environment (35°C, 30% rh), with a nasogastric (NG) tube under euhydrated - non-thirst (EUH-NT) and dehydrated - non-thirst (DEH-NT) conditions...
March 5, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29484346/factors-associated-with-pre-event-hydration-status-and-drinking-behavior-of-middle-aged-cyclists
#12
B A Yates, L A Ellis, C L Butts, B P McDermott, K H Williamson, L E Armstrong
OBJECTIVES: Water is an essential nutrient for thermoregulation, metabolism, cognition, and overall physiological homeostatic function. However, aging adults display a blunted thirst mechanism and subsequently have an increased risk for dehydration or hyponatremia. Fluid consumption behaviors are modifiable and the importance of practicing adequate drinking behaviors for aging adults is amplified during exercise. Identification of aging adult's hydration beliefs and how they attain hydration advice could provide valuable information into ways to promote better drinking habits to reduce fluid imbalances...
2018: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/29483882/fluid-metabolism-in-athletes-running-seven-marathons-in-seven-consecutive-days
#13
Daniela Chlíbková, Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle, Josef Bednář
Purpose: Hypohydration and hyperhydration are significant disorders of fluid metabolism in endurance performance; however, little relevant data exist regarding multi-stage endurance activities. The aim of the present study was to examine the effect of running seven marathons in 7 consecutive days on selected anthropometric, hematological and biochemical characteristics with an emphasis on hydration status. Methods: Participants included 6 women and 20 men (age 42.6 ± 6.2 years). Data was collected before day 1 (B1 ) and after day 1 (A1 ), 4 (A4 ), and 7 (A7 )...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29480561/a-retrospective-evaluation-of-echocardiograms-to-establish-normative-inferior-vena-cava-and-aortic-measurements-for-children-younger-than-6-years
#14
Erin K Stenson, Rajesh Punn, Musaab Ramsi, Saraswati Kache
OBJECTIVES: The ability to plot the inferior vena cava (IVC) size on a normal curve for pediatric patients may prove beneficial. First, in patients with normal cardiac anatomy who present in shock, assessing IVC size may be valuable for evaluating the degree of dehydration. Second, in children with heart disease, understanding how a child's IVC size compares to normal could be particularly beneficial for patients with right heart disease. We sought to create normal curves for the IVC and aorta in children younger than 6 years...
February 26, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29449943/aging-like-physiological-changes-in-the-skin-of-japanese-obese-diabetic-patients
#15
Ai Ibuki, Shoko Kuriyama, Yukiko Toyosaki, Misaki Aiba, Moeko Hidaka, Yoshiko Horie, Chihiro Fujimoto, Fumiyuki Isami, Eriko Shibata, Yasuo Terauchi, Tomoko Akase
Objective: Obesity-associated diabetes causes aging-like changes to skin physiology in animal models, but there have been no clinical studies focusing on human obese diabetic patients. The purpose of this study was to examine the hypothesis that obesity-associated diabetes accelerates aging-like skin changes in Japanese people. Methods: This cross-sectional study enrolled obese-diabetes patients (body mass index ≥ 25 kg m-2) and healthy volunteers (body mass index < 25 kg m-2 ) as controls...
2018: SAGE Open Medicine
https://www.readbyqxmd.com/read/29420149/muscle-glycogen-depletion-does-not-alter-segmental-extracellular-and-intracellular-water-distribution-measured-using-bioimpedance-spectroscopy
#16
Keisuke Shiose, Yosuke Yamada, Keiko Motonaga, Hideyuki Takahashi
Although each gram of glycogen is well known to bind 2.7-4.0 g of water, no studies have been conducted on the effect of muscle glycogen depletion on body water distribution. We investigated changes in extracellular and intracellular water (ECW and ICW) distribution in each body segment in muscle glycogen-depletion and glycogen-recovery condition using segmental bioimpedance spectroscopy technique (BIS). Twelve male subjects consumed 7.0 g.kg body mass-1 of indigestible (glycogen-depleted group) or digestible (glycogen-recovered group) carbohydrate for 24 hours after a glycogen-depletion cycling exercise...
February 8, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29413107/bioimpedance-parameters-in-adolescent-athletes-in-relation-to-bone-maturity-and-biochemical-zinc-indices
#17
Josely Correa Koury, Astrogildo Vianna de Oliveira-Junior, Mariana Ribeiro Costa Portugal, Karla de Jesus Fernandes de Oliveira, Carmen Marino Donangelo
Phase angle (PA) is derived from resistance and reactance determined by bioimpedance analysis (BIA) and it appears to relate to cellular stability and integrity. Interpretation of PA values could be complemented by bioelectrical impedance vector analysis (BIVA), which relates to body hydration and structure. Body composition, age, sex, and nutrients are known to stabilize cell membranes, such as zinc, have been related to PA although information is scarce in adolescent athletes. The aim of the present study was to assess the association of body composition, skeletal maturity and zinc biochemical indices with phase angle and bioelectrical impedance parameters, in forty male adolescent soccer athletes (13...
March 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29367255/hydration-and-obesity-among-outpatient-based-population-h2ob-study
#18
Juana Carretero-Gómez, Jose Carlos Arévalo Lorido, Ricardo Gómez Huelgas, Begoña De Escalante Yangüela, Borja Gracia Tello, Luis Pérez Belmonte, Javier Ena Muñoz
Recent evidence suggests that obese people are hypohydrated and that water consumption may be a useful indicator for the prevention and treatment of obesity. Nevertheless, there is no agreement regarding the best hydration status indicators and there are few data about the relationship between hydration and body weight. In the present study, we aim to analyze the correlation among hydration status with obesity measured by three different methods (plasma osmolarity, urinary specific gravity (USG) and urinary osmolarity) in a hospital-based outpatient population...
January 23, 2018: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/29364084/measured-and-perceived-indices-of-fluid-balance-in-professional-athletes-the-use-and-impact-of-hydration-assessment-strategies
#19
T D Love, D F Baker, P Healey, K E Black
BACKGROUND: To determine athletes perceived and measured indices of fluid balance during training and the influence of hydration strategy use on these parameters. METHODS: Thirty-three professional rugby union players completed a 120 minute training session in hot conditions (35°C, 40% relative humidity). Pre-training hydration status, sweat loss, fluid intake and changes in body mass (BM) were obtained. The use of hydration assessment techniques and players perceptions of fluid intake and sweat loss were obtained via a questionnaire...
April 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29351422/body-mass-specific-na-k-atpase-activity-in-the-medullary-thick-ascending-limb-implications-for-species-dependent-urine-concentrating-mechanisms
#20
Mun Aw, Tamara M Armstrong, C Michele Nawata, Sarah N Bodine, Jeeeun J Oh, Guojun Wei, Kristen K Evans, Mohammad Shahidullah, Timo Rieg, Thomas L Pannabecker
In general, the mammalian whole body mass-specific metabolic rate correlates positively with maximal urine concentration (Umax ) irrespective of whether or not the species have adapted to arid or mesic habitat. Accordingly, we hypothesized that the thick ascending limb (TAL) of a rodent with markedly higher whole body mass-specific metabolism than rat exhibits a substantially higher TAL metabolic rate as estimated by Na+ -K+ -ATPase activity and Na+ -K+ -ATPase α1-gene and protein expression. The kangaroo rat inner stripe of the outer medulla exhibits significantly higher mean Na+ -K+ -ATPase activity (~70%) compared with two rat strains (Sprague-Dawley and Munich-Wistar), extending prior studies showing rat activity exceeds rabbit...
April 1, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
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