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Farrell Anthony P AP Department of Zoology, Faculty of Land and Food Systems, University of British Columbia, Vancouver, V6T 1Z4, Canada, - - 2014
While it is well known that O2 is directly removed from the water by skin and gill tissues of fish, the mismatch between O2 removal from water (O2 uptake; [Formula: see text]) and the O2 delivered to tissues by the primary circulation (O2 consumption; [Formula: see text]) has never been ...
Vanderlei Franciele Marques FM Federal University of São Paulo, São Paulo, - - 2014
Despite the importance of hydration during exercise, the impact of ingesting water or isotonic solution during and after exercise on the regulation of autonomic modulation is unclear. The study aimed to compare the effect of ingesting water or isotonic solution (Gatorade®, Brazil) on cardiac autonomic modulation in young people after ...
Sato Daisuke D Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan, - - 2014
Physical exercise has been reported to be the most effective method to improve cognitive function and brain health, but there is as yet no research on the effect of water-based exercise. The aim of the present study was to compare the effects of water-based exercise with and without cognitive stimuli ...
Hew-Butler Tamara Dawn TD Oakland University - - 2014
A regulatory effect of arginine vasopressin (AVP) on sweat water conservation has been hypothesized but not definitively evaluated. AVP-mediated insertion of sweat and salivary gland aquaporin-5 (AQP5) water channels through activation of the vasopressin type 2 receptor (V2R) remains an attractive, yet unexplored, mechanism that could result in a more ...
Wong S Heung Sang HS Dept. of Sports Science and Physical Education, Chinese University of Hong Kong, Hong Kong, - - 2014
The purpose of the current study was to examine the effect of flavor on voluntary drinking and thermoregulatory responses in Chinese boys and girls exercising intermittently in a hot environment. Fourteen boys and girls (9 to 11 years old) performed four 3-hour intermittent exercise sessions (20-min walking sessions at 50% ...
Ozkor Muhiddin A MA From the Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, GA (M.A.O., A.M.R., J.R.M., N.K., S.H., A.A.Q.); and Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA (J.L., - - 2014
Abnormalities in nitric oxide (NO) bioavailability have been reported in blacks. Whether there are differences in endothelium-derived hyperpolarizing factor (EDHF) in addition to NO between blacks and whites and how these affect physiological vasodilation remain unknown. We hypothesized that the bioavailability of vascular NO and EDHF, at rest and with ...
Broatch James R JR 1Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, Melbourne, Australia; 2College of Sport and Exercise Science, Victoria University, Melbourne, - - 2014
Despite a general lack of understanding of the underlying mechanisms, cold-water immersion (CWI) is widely used by athletes for recovery. This study examined the physiological merit of CWI for recovery from high-intensity exercise, by investigating if the placebo effect is responsible for any acute performance or psychological benefits. Thirty males ...
Stewart C J CJ School of Biomedical Sciences, Charles Sturt University, Bathurst, - - 2014
This study examined the effect of exercise-induced dehydration by ~4% body mass loss on 5-km cycling time trial (TT) performance and neuromuscular drive, independent of hyperthermia. 7 active males were dehydrated on 2 occasions, separated by 7 d. Participants remained dehydrated (DEH, -3.8±0.5%) or were rehydrated (REH, 0.2±0.6%) over 2 h ...
Ramos-Jiménez Arnulfo A Department of Health Sciences, Biomedical Sciences Institute. Autonomous University of Ciudad Juarez. Ciudad Juárez, México.. - - 2014
Introduction: There is scarce and inconsistent information about gender-related differences in the hydration of sports persons, as well as about the effects of hydration on performance, especially during indoor sports. Objective: To determine the physiological differences between genders during in indoor physical exercise, with and without hydration. Methods: 21 spinning ...
Lomonosova Yulia N YN Institute for Bio-Medical Problems, RAS, Moscow, - - 2014
Eccentric exercise is known to disrupt sarcolemmal integrity and induce damage of skeletal muscle fibers. We hypothesized that L-arginine (L-Arg; nitric oxide synthase (NOS) substrate) supplementation prior to a single bout of eccentric exercise would diminish exercise-induced damage. In addition, we used N-nitro-L-arginine methyl ester hydrochloride (L-NAME; NOS inhibitor) to ...
Stasiule Loreta L Lithuanian Sports University, Kaunas, - - 2014
The effect of deep mineral water (DMW) with moderate mineralization on the recovery of physical performance after prolonged dehydrating aerobic exercise in the heat was studied in nine healthy, physically active (VO2max = 45.8 ± 8.4 mL kg(-1) min(-1)) women aged 24.0 ± 3.7 years. We conducted a randomized, double-blind, placebo-controlled crossover human study to evaluate the effect of ingestion ...
Costa Kátia Anunciação - - 2013
Dietary supplementation with l-arginine has been shown to improve the intestinal barrier in many experimental models. This study therefore investigated the effects of arginine supplementation on the intestinal permeability and bacterial translocation (BT) induced by prolonged physical exercise under heat stress. Under anesthesia, male Swiss mice (5 wk old) were ...
Alberton Cristine L - - 2013
The purpose of the present study was to compare the cardiorespiratory responses of young women to exercise at the first ventilatory threshold (VT1), the second ventilatory threshold (VT2) and at maximum effort (MAX) between maximal incremental tests performed using water aerobic exercises and a treadmill on land (TL). Twenty women ...
Mears Stephen A - - 2013
Water intake occurs following a period of high-intensity intermittent exercise (HIIE) due to sensations of thirst yet this does not always appear to be caused by body water losses. Thus, the aim was to assess voluntary water intake following HIIE. Ten healthy males (22 ± 2 y, 75.6 ± 6.9 ...
Bhardwaj Atul A Associate Professor and Head, Department of Shalakya Tantra, M.S.M. Institute of Ayurveda, B.P.S. Mahila Vishwavidyalaya, Khanpur Kalan, Sonipat, Haryana, - - 2013
The current endeavor intended to evaluate the effectiveness and mode of action of Anuloma-Viloma Pranayama (AVP), i.e., alternate nasal breathing exercise, in resolving clinical features of Pratishyaya, i.e., rhinosinusitis. The present study was directed to validate the use of classical "saccharin test" in measuring the nasal health by measuring mucociliary ...
Versey Nathan G - - 2013
Water immersion is increasingly being used by elite athletes seeking to minimize fatigue and accelerate post-exercise recovery. Accelerated short-term (hours to days) recovery may improve competition performance, allow greater training loads or enhance the effect of a given training load. However, the optimal water immersion protocols to assist short-term recovery ...
McDermott Brendon P - - 2013
Our purpose was to compare common modes of rehydration (REHY) on cardiovascular and fluid regulation recovery following exercise dehydration (EXDE). Twelve non-heat-acclimatized trained subjects (23±4y, 81.3±3.7kg, 180±6cm, 56.9±4.4mLminkg VO2max, 7.8±3.0 % body fat) completed 20-h fluid restriction and 2-h EXDE to -4% body mass, then were rehydrated to -2% body ...
Alberton C L - - 2013
The aim of the present study was to compare the peak vertical ground reaction force (V-GRFpeak) and impulse of women performing water aerobic exercises at different intensities in aquatic and dry land environments. 15 young women performed 1 session in each environment consisting of 3 water aerobic exercises (stationary running, ...
Hallstrand Teal S - - 2013
A susceptible group of subjects with asthma develops airflow obstruction in response to the transfer of water out of the airways during exercise. The transfer of water or the challenge with a hypertonic solution serves as a strong stimulus to the airway epithelium. Susceptible subjects have epithelial shedding into the ...
Mears Stephen A - - 2013
Water intake occurs following a period of high intensity intermittent exercise (HIIE) due to sensations of thirst yet this does not always appear to be caused by body water losses. Thus, the aim was to assess voluntary water intake following HIIE. Ten healthy males (22±2y, 75.6±6.9kg, VO2peak 57.3±11.4ml.kg-1.min-1) (mean±SD) completed ...
Phattanarudee Siripan - - 2013
We have reported that in rats with a 90 min left middle cerebral artery occlusion (MCAO) and 24 h reperfusion, pressor responses during muscle contractions were attenuated, as were glutamate concentrations in the left rostral ventrolateral medulla (RVLM) and left caudal VLM (CVLM), but gamma-aminobutyric acid (GABA) levels increased in ...
Mendonca Goncalo V - - 2013
Water drinking attenuates the chronotropic response to submaximal exercise. However, it is not known whether this effect is equally manifested during dynamic exercise below and above ventilatory threshold (VT). We explored the effects of water ingestion on the heart rate response to an incremental cycle-ergometer protocol. In a randomized fashion, ...
Forbes Scott C - - 2013
L-arginine may enhance endurance performance mediated by two primary mechanisms including enhanced secretion of endogenous growth hormone (GH) and as a precursor of nitric oxide (NO); however, research in trained participants has been equivocal. The purpose was to investigate the effect of acute L-arginine ingestion on the hormonal and metabolic ...
Hue Olivier - - 2013
We tested the effect of cold water ingestion during high-intensity training in the morning versus the evening on both the core temperature and thermal perceptions of internationally ranked long-distance swimmers during a training period in a tropical climate. Nine internationally ranked long-distance swimmers (5 males and 4 females) performed 4 ...
Pearson James - - 2013
Dehydration and hyperthermia reduces leg blood flow (LBF), cardiac output ([Formula: see text]) and arterial pressure during whole-body exercise. It is unknown whether the reductions in blood flow are associated with dehydration-induced alterations in arterial blood oxygen content (C (a)O(2)) and O(2)-dependent signalling. This study investigated the impact of dehydration ...
Driessen Jean Mm - - 2013
Prevalence of exercise-induced bronchoconstriction (EIB) is high in elite athletes, especially after many years training in cold and dry air conditions. The primary treatment of EIB is inhaling a short-acting beta-2-agonist such as salbutamol. However, professional speed skaters also inhale nebulized isotonic saline or tap water before and after a ...
Maughan R J - - 2013
Hydration status has profound effects on both physical and mental performance, and sports performance is thus critically affected. Both overhydration and underhydration - if sufficiently severe - will impair performance and pose a risk to health. Athletes may begin exercise in a hypohydrated state as a result of incomplete recovery ...
Nakanishi Rin - - 2013
This study was undertaken to investigate the effects of oral L-arginine administration and exercising training on the NO concentration emanating from rat tail and NOx in plasma. Obese (fa/fa) Zucker rats (n = 22) were divided into four groups: (1) oral L-arginine administration (A) (n = 6), (2) exercise training ...
Bergamin Marco M Sports Medicine Division, Department of Medicine, University of Padova, Padua, Italy. - - 2013
The aim of this study was to assess the effectiveness of a 24-week exercise protocol carried out in geothermal spring water to improve overall physical function and muscle mass in a group of healthy elderly subjects. A further aim was to compare this water-based protocol with a land-based protocol and ...
Sanders Mary E ME School of Medicine, School of Community Health Sciences, University of Nevada , Reno, USA - - 2013
Older women may have chronic or age-related conditions that increase the risk of falls or that limit their ability to remain active. It is unclear if a water-based exercise program provides a safe and effective alternative to land-based exercise. The purpose of this study was to evaluate the impact of ...
Tanabe Mai - - 2013
The aim of this study was to investigate the influences of rehydration and food consumption on salivary flow, pH, and buffering capacity during bicycle ergometer exercise in participants. Ten healthy volunteers exercised on a bicycle ergometer at 80% of their maximal heart rate. These sessions lasted for two periods of ...
Dunne Alan - - 2012
OBJECTIVE: Despite the widespread use of cold water immersion (CWI) in normothermic conditions, little data is available on its effect on subsequent endurance performance. This study examined the effect of CWI as a recovery strategy on subsequent running performance in normothermic ambient conditions (∼22°C). DESIGN: Nine endurance-trained men completed two ...
Braulick Kyle W - - 2012
OBJECTIVE: Many clinicians believe that exercise-associated muscle cramps (EAMC) occur because of dehydration. Experimental research supporting this theory is lacking. Mild hypohydration (3% body mass loss) does not alter threshold frequency (TF), a measure of cramp susceptibility, when fatigue and exercise intensity are controlled. No experimental research has examined TF ...
Cunha Raphael M - - 2012
Background: There are few studies relating the practice of water exercises and blood pressure responses. Aim: The objective of this study was to evaluate the subacute blood pressure behaviour in elderly hypertensive women after a water exercise session. Methods: This was a controlled clinical trial, carried out with 16 hypertensive ...
Goulet Eric Db - - 2012
The field of research examining the link between dehydration and endurance performance is at the dawn of a new era. This article reviews the latest findings describing the relationship between exercise-induced dehydration and endurance performance and provides the knowledge necessary for competitive, endurance-trained athletes to develop a winning hydration strategy. ...
Mesfar Mohamed A - - 2012
Background: Sport represents a stress for the body. Many metabolic and cardiorespiratory changes are known during physical activity.However, litte is kwown in swimmers particularily during head-out immersion. Aim: To determine the metabolic and cardiorespiratory response in swimmers during head-out immersion. Methods: The energetic, cardiovascular function and ventilatory requirements of a ...
Sureda Antoni - - 2013
Dietary L-citrulline malate supplements may increase levels of nitric oxide (NO) metabolites, although this response has not been related to an improvement in athletic performance. NO plays an important role in many functions in the body regulating vasodilatation, blood flow, mitochondrial respiration and platelet function. L-Arginine is the main precursor ...
Endo M Y - - 2012
Background/objectives:Post-exercise hypotension (PEH) is a sustained reduction in mean arterial blood pressure (MAP) after prolonged exercise. As water drinking is known to elicit a large acute pressor response, we aimed to explore the effect of drinking water during exercise on PEH.Subjects/methods:Ten normotensive male volunteers performed the control protocol: 30 min supine ...
Alberton Cristine Lima - - 2012
ABSTRACT: This study aimed to compare the maximal and 1st and 2nd ventilatory threshold (VT) oxygen uptake values (VO2) and ratings of perceived exertion (RPE) responses of treadmill running (TR) with three water aerobic exercises: stationary running (SR), jumping jacks (JJ) and forward kick (FK). Nine women (22.89 ± 1.81 ...
Xiao Si-Chang - - 2012
Neural respiratory drive is usually measured during inspiration, even in patients with chronic obstructive pulmonary disease (COPD) in whom the primary physiological deficit is expiratory flow limitation. The purpose of the study was to test the hypothesis that inspiratory muscle neural respiratory drive could be used to assess expiratory load. ...
McNamara Renae J - - 2012
Land-based exercise is often difficult for people with COPD who have co-existing obesity, musculoskeletal or neurological conditions. This randomised controlled trial aimed to determine the effectiveness of water-based exercise training in improving exercise capacity and quality of life compared to land-based exercise training and control (no exercise) in people with ...
Lhuissier François J - - 2012
The risk of severe altitude-induced diseases is related to ventilatory and cardiac responses to hypoxia and is dependent on sex, age and exercise training status. However, it remains unclear how ageing modifies these physiological adaptations to hypoxia. We assessed the physiological responses to hypoxia with ageing through a cross-sectional 20 ...
Krontveit Randi I - - 2012
Objective-To identify housing- and exercise-related risk factors associated with the development of hip dysplasia (HD) as determined by radiographic evaluation in Newfoundlands, Labrador Retrievers, Leonbergers, and Irish Wolfhounds in Norway. Animals-501 client-owned dogs from 103 litters. Procedures-Dogs were assessed from birth until official radiographic screening for HD at 12 (Labrador ...
Brickwood Katie-Jane - - 2012
OBJECTIVES: Exercise participation is important in overall health, but is not without risk, particularly when exercising at vigorous intensities. Pre-exercise screening procedures such as the Sports Medicine Australia Pre-Exercise Screening System (SMA PESS) aim to minimise risks while maximising benefits from physical activity. The purpose of this study was to ...
Irwin Brandon C - - 2012
BACKGROUND: A key barrier to achieving recommended intensity and duration of physical activity is motivation. PURPOSE: We investigated whether a virtually present partner would influence participants' motivation (duration) during aerobic exercise. METHOD: Fifty-eight females (M (age) = 20.54 ± 1.86) were randomly assigned to either a coactive condition (exercising alongside another person, independently), a ...
Korzeniowska-Kubacka Iwona - - 2012
INTRODUCTION There is still unresolved question whether ischemia-inducing training regime would be superior to guideline-driven approach which recommends that training intensity should stay below the ischemic threshold( IT) . OBJECTIVES This study purpose was to assess the influence of pre-training warm-up ischemia on effects of training conducted either at or below the ...
West Daniel W D - - 2012
We made sex-based comparisons of rates of myofibrillar protein synthesis (MPS) and anabolic signaling after a single bout of high-intensity resistance exercise. Eight men (20 ± 10 yr, BMI = 24.3 ± 2.4) and eight women (22 ± 1.8 yr, BMI = 23.0 ± 1.9) underwent primed constant infusions of ...
Borel Anne-Laure - - 2012
Excess visceral adipose tissue (VAT) is associated with an increased cardiometabolic risk. The study examined whether changes in cardiometabolic risk markers after a 1-year lifestyle intervention in viscerally obese men were associated with changes in VAT or with changes in subcutaneous abdominal adipose tissue (SAT). The relative contributions of changes ...
Green M A - - 2012
Muscle stiffness has been reported to increase following eccentric muscle exercise, but to date only indirect methods have been used to measure it. This study aimed to use Magnetic Resonance Elastography (MRE), a noninvasive imaging technique, to assess the time-course of passive elasticity changes in the medial gastrocnemius and soleus ...
Kormann R - - 2012
We report the case of an athletic 49-year-old female who has run the 2011 Marathon of Paris and was addressed to the hospital for a confusion. The investigations revealed a cerebral edema complicating a severe hyponatremia secondary to an exercise-associated hyponatremia (EAH). Using 3% hypertonic saline solution, the evolution the ...
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