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Ho Jen-Yu JY a Department of Athletic Performance , National Taiwan Normal University , Taipei , - - 2014
This study examined hormonal responses to low-intensity resistance exercise under mild simulated hypoxia. Ten resistance untrained men performed five sets of 15 repetitions of squat exercise at 30% of 1RM under normobaric hypoxia (FiO2 = 15%) and normoxia in a cross-over and counter-balanced design. Blood lactate (LAC), growth hormone (GH), ...
Eliakim A A 1Child Health & Sports Center, Pediatric Department, Meir Medical Center, Sackler School of Medicine, Tel-Aviv University, Israel. 2The Zinman College of Physical Education and Sport Sciences, Wingate Institute, Netanya, - - 2014
Exercise-associated effects on the GH→IGF-I axis were studied, mainly following aerobic exercise. We determined the gender effect on the GH→IGF-I axis response to a standard all-out Wingate anaerobic test (WAnT) in healthy active young adult males and females (males=12, females=16, age range: 24-34 years). Blood samples for GH and IGF-I, ...
JanukonytÄ— J J Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark. Electronic address: - - 2014
Diurnal variation in serum growth hormone (s-GH) levels after exogenous GH delivery has previously been reported in patients with no endogenous GH secretion. Changes in postural position or physical activity, leading to changes in blood flow and/or lymphatic drainage may be underlying explanations. The primary aim of this study is ...
Moeller Chad R CR Arizona Diamondbacks Baseball Club, - - 2014
Context :  Alterations in scapular muscle activation, which are common with glenohumeral (GH) injuries, affect stability and function. Rehabilitation aims to reestablish activation between muscles for stability by progressing to whole-body movements. Objective :  To determine scapular muscle-activation ratios and individual muscle activity (upper trapezius [UT], middle trapezius [MT], lower ...
Voss Sven Christian SC Anti-Doping Lab Qatar, PO Box 27775, Doha, Aspire Zone, Doha, - - 2014
The major objective of this study was to investigate the effects of several days of intense exercise on the growth hormone marker approach to detect doping with human growth hormone (hGH). In addition we investigated the effect of changes in plasma volume on the test. Fifteen male athletes performed a ...
Budnar Ronald G RG Jr 1Applied Physiology Laboratory Department of Kinesiology, Health Promotion and Recreation University of North Texas Denton, TX 76203 2Department of Biological Sciences University of North Texas Denton, TX - - 2014
The purpose of this investigation was to examine the acute hormonal response to the kettlebell swing exercise. Ten recreationally resistance trained men (24±4 y, 175±6 cm, 78.7±9.9 kg) performed 12 rounds of 30 seconds of 16 kg kettlebell swings alternated with 30 seconds of rest. Blood samples were collected before ...
Rezaee S S Department of Physiotherapy Tarbiat Modares University, Tehran, Iran - - - 2014
Aim: This study investigated the influence of resistance (R) following endurance (E) exercise or ER on acute hormonal responses, such as growth hormone (GH), total testosterone (TT), free testosterone (FT), IGF-1, and cortisol. Methods: Ten healthy young men with an average age of 23.9 years (±0.7 y), a height of ...
Ackerman James - - 2014
Antioxidant supplementation is known to increase human endogenous antioxidant (AOX) capacity providing a means of blunting exercise induced reactive oxygen species (ROS). The purpose of this study was to compare the effects of a single acute dose of an AOX (vs blinded placebo) on muscle contractile performance and hormonal responses ...
Nindl Bradley C BC 1Military Performance and 2Military Nutrition Divisions, U.S. Army Research Institute of Environmental Medicine, Natick, - - 2014
The pulsatile secretion pattern of growth hormone (GH) is an important parameter of GH action at peripheral tissues and more information is needed on how exercise impacts GH secretion. This study hypothesized that both aerobic and resistance exercise would exhibit dose-response relationships with respect to exercise duration and 20-h post-exercise ...
da Silva Davi Vieira Teixeira DV Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, - - 2014
Nutritional supplements based on the amino acid L-arginine have been hypothesized to improve exercise performance by increasing levels of insulin and growth hormone (GH). Changes of these parameters in response to L-arginine supplementation may clarify the mechanisms underlying its putative physiological effects on physical performance. The aim of the study ...
Galy Olivier O Laboratory ACTES, (EA 3596: Department of Physiology), Faculty of Physical Activity and Sports, University of Guadeloupe, Pointe à Pitre, France; Laboratory CNEP (EA 4242), University of New Caledonia, Nouméa, New - - 2014
Growth hormone (GH) may stimulate water loss during exercise by activating sweating. This study investigated GH secretion and water loss during sequential cycling and running, taking postural changes into account. The two exercise segments had similar durations and were performed at the same relative intensity to determine their respective contributions ...
Trilk Jennifer L JL Exercise is Medicine Education Committee, Assistant Professor, Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, South Carolina, - - 2013
Educating medical students and other health professionals in training on the importance of healthy lifestyles for prevention and treatment of disease is essential to transforming healthcare. At the University of South Carolina School of Medicine Greenville (USC SOM Greenville), we are incorporating the 'Exercise is Medicine' Knowledge, Skills and Abilities ...
Shaner Aaron A - - 2013
Resistance exercise can acutely increase concentrations of circulating neuroendocrine factors, but the effect of mode on this response is not established. The purpose of this study was to examine the effect of resistance exercise selection on the acute hormonal response using similar lower-body multi-joint movement free weight and machine weight ...
Forbes Scott C - - 2013
Acute resistance exercise and L-arginine have both been shown to independently elevate plasma growth hormone (GH) concentrations; however, their combined effect is controversial. The purpose was to investigate the combined effects of resistance exercise and L-arginine supplementation on plasma L-arginine, GH, GH secretagogues, and IGF-1 in strength trained participants. Fourteen ...
Alvares Thiago Silveira TS Nucleus of Basic Nutrition and Dietetics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Department of Biochemistry, Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: - - 2014
It has been hypothesized that l-arginine improves exercise performance by increasing nitric oxide synthesis and levels of insulin and growth hormone (GH). Metabolic and hormonal responses to chronic l-arginine supplementation may clarify the mechanisms underlying its putative physiologic effects on physical performance. Therefore, the aim of this study was to ...
Oöpik Vahur - - 2013
The major objective of this study was to elucidate the effect of heat acclimation on blood growth hormone (GH) response to moderate intensity exhausting exercise in the heat. In addition, the potential relationship between inter-individual differences in GH response to exercise and variability in exercise-induced sweat loss was investigated. Twenty ...
Kraemer William J - - 2013
The anterior pituitary gland (AP) increases growth hormone (GH) secretion in response to resistance exercise (RE), but the nature of AP adaptations to RE is unknown. We examined the effects of RE on regional AP somatotroph GH release, structure, and relative quantity. Thirty-six Sprague-Dawley rats were assigned to one of ...
Yardley Jane E JE a Human and Environmental Physiology Research Unit, Montpetit Hall, University of Ottawa, Ottawa, ON K1N 6N5, - - 2014
We compared growth hormone (GH) and plasma glucose (PG) levels in type 1 diabetic individuals performing aerobic before resistance exercise (AR) to when resistance exercise was performed first (RA). In AR, GH secretion declined in late exercise while it rose throughout exercise in RA, resulting in higher GH in RA ...
Thomas Gwendolyn A - - 2013
Growth hormone (GH) is regulated, suppressed and stimulated by numerous physiological stimuli. However, it is believed that obesity disrupts the physiological and pathological factors that regulate, suppress or stimulate GH release. Pulsatile GH has been potently stimulated in healthy subjects by both aerobic and resistance exercise of the right intensity ...
Sartorio A - - 2013
Repeated bouts of GH-releasing stimuli (both pharmacological and physiological, such as aerobic exercise) at 2-h intervals are associated with a blunting of somatotropic responsiveness in normal adults, while a persistent GH responsiveness to consecutive stimuli is reported to occur in children and adolescents. Recently, a single bout of respiratory muscle ...
Giunta M - - 2013
In recent years, whole body vibration (WBV) has become an efficient complement or alternative to resistance training. Very limited data on the effects of different WBV protocols on anabolic hormones are available. In this study, we compared the growth hormone (GH), blood lactate (LA), and cortisol responses to different protocols ...
Girman Julia C JC a Department of Exercise Science and Sports Studies , Springfield College , Springfield , MA , - - 2014
Abstract Limited research exists on rest-pause or cluster-set (CS) protocols. Acute effects of a traditional set (TS) and CS protocols of resistance exercise on serum growth hormone (GH), cortisol (C), blood lactate (BL), countermovement vertical jump (CMVJ) and standing long jump (SLJ) were compared. Eleven resistance-trained males (22.9±2.6 year; 176.9±10.6 ...
Myers Valerie H VH Pennington Biomedical Research Center, Baton Rouge, Lousiana, USA. - - 2013
To establish whether exercise improves quality of life (QOL) in individuals with type 2 diabetes and which exercise modalities are involved. Health Benefits of Aerobic and Resistance Training in individuals with type 2 Diabetes (HART-D; n = 262) was a 9-month exercise study comparing the effects of aerobic training, resistance ...
Simão Roberto - - 2013
The aim of this study was to examine acute hormonal responses after different sequences of an upper-body resistance-exercise session. Twenty men completed 2 sessions (3 sets; 70% 1-repetition maximum; 2 min passive rest between sets) of the same exercises in opposite sequences (larger to smaller vs. smaller to larger muscle-group ...
Curzi D D Carlo Bo University of Urbino. - - 2013
Myotendinous junctions (MTJs) are specialized sites on the muscle surface where forces generated by myofibrils are transmitted across the sarcolemma to the extracellular matrix. At the ultrastructural level, the interface between the sarcolemma and extracellular matrix is highly folded and interdigitated at these junctions. In this study, the effect of ...
Apicella Jenna M - - 2012
Our aim was to examine the effect of betaine supplementation on selected circulating hormonal measures and Akt muscle signaling proteins after an acute exercise session. Twelve trained men (age 19.7 ± 1.23 years) underwent 2 weeks of supplementation with either betaine (B) (1.25 g BID) or placebo (P). Following a 2-week washout period, subjects underwent ...
Stokes Keith A - - 2012
Exercise is a potent stimulus for release of growth hormone (GH), cortisol, testosterone and prolactin, and prolonged exercise inhibits insulin secretion. These responses seem to be specific to the type of exercise but this has been poorly characterised primarily because they have not been compared during exercise performed by the ...
Zebrowska A - - 2012
The study aimed at evaluating changes in plasma levels of insulin-like growth factor 1 (IGF-1), insulin-like growth factor binding protein-3 (IGFBP-3), testosterone, growth hormone (GH), cortisol, and insulin in resistance-trained male athletes with (n=9) and without (n=9) left ventricular hypertrophy (LVH) in response to eccentric (ECC) and concentric (CON) arm ...
Patterson Stephen D - - 2012
It has been suggested that circulating hormones and cytokines are important in the adaptive response to low-load resistance training (LLRT) with blood flow restriction (BFR); however, their response following this type of training in older men is unclear. Seven healthy older men (age 71.0 ± 6.5 year, height 1.77 ± 0.05 m, body mass 80.0 ± 7.5 kg; mean ± SD) ...
Hamouti Nassim - - 2013
Blood serum osmolality (S (OSM)) is the gold standard to assess body fluid balance. Urine specific gravity (U (SG)) is also a body fluid balance index but it is not invasive. However, U (SG) capability to detect the minimal level of dehydration that affects athletic performance (i.e., 2 %) remains ...
Kamijo Yoshi-Ichiro - - 2012
We examined whether carbohydrate in beverages accelerated fluid retention during recovery from thermal and exercise-induced dehydration and whether it was caused in part by an enhanced renal Na(+) reabsorption rate due to insulin secretion. After dehydrating by ~2.3% body weight by exercise in a hot environment, seven young men underwent ...
Muñoz C X - - 2012
Only limited research evaluates possible benefits of combined drinking and external cooling (by pouring cold water over the body) during exercise. Therefore, this study examined cold water drinking and external cooling on physiological, perceptual, and performance variables in hot, dry environments. Ten male runners completed four trials of walking 90 min ...
Masschelein Evi - - 2012
Exercise tolerance is impaired in hypoxia, and it has recently been shown that dietary nitrate supplementation can reduce the oxygen (O(2)) cost of muscle contractions. Therefore, we investigated the effect of dietary nitrate supplementation on arterial, muscle, and cerebral oxygenation status, symptoms of acute mountain sickness (AMS), and exercise tolerance ...
Rollo Ian - - 2012
The purpose of the present investigation was to investigate the influence of ingesting a carbohydrate-electrolyte beverage ad-libitum or as a prescribed volume on 10 mile run performance and gastrointestinal discomfort. Nine male recreational runners completed the 10 mile run under the following three conditions (1) no drinking (ND; 0 ml, ...
Watson Phillip - - 2012
Eight males were recruited to a study designed to examine the effect of tyrosine supplementation on the capacity to perform prolonged exercise in a warm environment. Subjects entered the laboratory in the morning and remained seated for 1 h before cycling to exhaustion at 70% VO2 peak. Two 250 mL ...
Wegmann Melissa - - 2012
Pre-cooling is used by many athletes for the purpose of reducing body temperature prior to exercise and, consequently, decreasing heat stress and improving performance. Although there are a considerable number of studies showing beneficial effects of pre-cooling, definite conclusions on the effectiveness of pre-cooling on performance cannot yet be drawn. ...
Burdon Catriona A - - 2012
Beverage palatability is known to influence fluid consumption during exercise and may positively influence hydration status and help to prevent fatigue, heat illness and decreased performance. PURPOSE: The aims of this review were to evaluate the effect of beverage temperature on fluid intake during exercise and investigate the influence of ...
Burdon Catriona A - - 2012
Beverage palatability is known to influence fluid consumption during exercise and may positively influence hydration status and help prevent fatigue, heat illness, and decreased performance. The aims of this review were to evaluate the effect of beverage temperature on fluid intake during exercise and investigate the influence of beverage temperature ...
Burke Louise M - - 2012
PURPOSE: We have previously shown that the aminoacidemia caused by the consumption of a rapidly digested protein after resistance exercise enhances muscle protein synthesis (MPS) more than the amino acid (AA) profile associated with a slowly digested protein. Here, we investigated whether differential feeding patterns of a whey protein mixture ...
Burke Louise M - - 2012
Abstract Ramadan fasting, involving abstinence from fluid and food from sunrise to sundown, results in prolonged periods without nutrient intake and inflexibility with the timing of eating and drinking over the day. Dietary choices may also change due to special eating rituals. Although nutrition guidelines are specific to the sport, ...
Turley Kenneth R - - 2012
The effects of caffeine on anaerobic exercise in young boys was investigated. Twenty-four healthy 8-10 year old boys participated in a randomized double-blind, double-crossover, counter-balanced study. Each subject received the caffeinated drink (CAF-5 mg · kg-1) or placebo (PL) twice each on four separate visits. Sixty minutes following ingestion of ...
Tamam Shlomi - - 2012
The effect of short duration exercise (EXR) on food intake (FI) and energy balance (EB) is not well understood in either normal weight (NW) or overweight (OW) and obese (OB) 9-14 years old children. Our purpose was to describe the effects of activity and a glucose drink on short term ...
Gwacham Nnamdi - - 2012
Consumption of energy drinks is common among athletes; however, there is a lack of research on the efficacy of these beverages for short-duration, intense exercise. The purpose of this research was to investigate the acute effects of a low-calorie caffeine-taurine energy drink (AdvoCare Spark) on repeated sprint performance and anaerobic ...
Park Sung Geon - - 2012
The purpose of this study was to determine the effects of beverage temperature and composition on weight retention and fluid balance upon voluntary drinking following exercise induced-dehydration. Eight men who were not acclimated to heat participated in four randomly ordered testing sessions. In each session, the subjects ran on a ...
van Rosendal Simon P - - 2012
PURPOSE: Intravenous (IV) saline has been used by athletes attempting to accelerate rehydration procedures. The diuresis from IV rehydration may be circumvented through the concomitant use of oral glycerol. We aimed to examine the effects of rehydrating with four different regimes of IV fluid and oral glycerol on subsequent 40 ...
Sasaki Nobuyuki - - 2012
ABSTRACT: Study Design. Descriptive experimental study.Objective. The aim of this study was to investigate the effect of exercise on cell proliferation in different areas of the IVD and recruitment of cells possibly active in regeneration of normal rat lumbar IVDs.Summary of Background Data. Little is known about the effects of ...
Gwacham Nnamdi - - 2012
Consumption of energy drinks is common among athletes; however, there is a lack of research on the efficacy of these beverages for short-duration, intense exercise. The purpose of this research was to investigate the acute effects of a low-calorie, caffeine-taurine, energy drink (AdvoCare Spark®) on repeated sprint performance and anaerobic ...
Siegler Jason - - 2012
As most sport drinks contain some form of non-nutritive sweetener (e.g. aspartame), and with the variation in blood glucose regulation and insulin secretion reportedly associated with aspartame, a further understanding of the effects on insulin and blood glucose regulation during exercise is warranted. Therefore, the aim of this preliminary study ...
Xu Jun - - 2012
Health-related quality of life (HRQoL) has been increasingly acknowledged as a valid and appropriate indicator of public health and chronic morbidity. However, limited research was conducted among Chinese civil servants owing to the different lifestyle. The aim of the study was to evaluate the HRQoL among Chinese civil servants and ...
Del Coso Juan - - 2012
To investigate the effects of a caffeine-containing energy drink on soccer performance during a simulated game. A second purpose was to assess the post-exercise urine caffeine concentration derived from the energy drink intake. Nineteen semiprofessional soccer players ingested 630 ± 52 mL of a commercially available energy drink (sugar-free Red ...
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