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https://www.readbyqxmd.com/read/28806275/effects-of-creatine-and-carbohydrate-loading-on-cycling-time-trial-performance
#1
Kristyen A Tomcik, Donny M Camera, Julia L Bone, Megan L Ross, Nikki A Jeacocke, Bill Tachtsis, Joan Senden, Luc J C van Loon, John A Hawley, Louise M Burke
INTRODUCTION: Creatine- and carbohydrate-loading are dietary strategies used to enhance exercise capacity. This study examined the metabolic and performance effects of a combined creatine and CHO-loading regiment on time-trial (TT) cycling bouts. METHODS: Eighteen well-trained (~65mL[BULLET OPERATOR]kg[BULLET OPERATOR]min VO2peak) males completed three performance trials (PT) comprised of a 120-km cycling TT interspersed with alternating 1- and 4-km sprints (6 sprints each) performed every 10-km followed by an inclined ride to fatigue (~90% VO2peak)...
August 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28806049/electrolytes-oral-electrolyte-solutions
#2
Lisa Harris
Oral electrolyte solutions are used widely for rehydration in diarrheal illness and to maintain hydration during vigorous exercise. In diarrheal illness, an oral rehydration solution (ORS) typically is preferred over intravenous fluids except for patients with severe dehydration. The preferred ORS is one similar to the glucose-containing reduced osmolarity World Health Organization ORS. There also are polymer-based solutions that use rice or wheat as the source of carbohydrates but these are not widely recommended...
August 2017: FP Essentials
https://www.readbyqxmd.com/read/28801776/effects-of-training-status-on-pdh-regulation-in-human-skeletal-muscle-during-exercise
#3
Anders Gudiksen, Lærke Bertholdt, Tomasz Stankiewicz, Jonas Tybirk, Peter Plomgaard, Jens Bangsbo, Henriette Pilegaard
Pyruvate dehydrogenase (PDH) is the gateway enzyme for carbohydrate-derived pyruvate feeding into the TCA cycle. PDH may play a central role in regulating substrate shifts during exercise, but the influence of training state on PDH regulation during exercise is not fully elucidated. The purpose of this study was to investigate the impact of training state on post-translational regulation of PDHa activity during submaximal and exhaustive exercise. Eight untrained and nine endurance exercise-trained healthy male subjects performed incremental exercise on a cycle ergometer: 40 min at 50% incremental peak power output (IPPO), 10 min at 65% (IPPO), followed by 80% (IPPO) until exhaustion...
August 11, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28801130/prospective-implementation-of-enhanced-recovery-after-surgery-protocols-to-radical-cystectomy
#4
Karl H Pang, Ruth Groves, Suresh Venugopal, Aidan P Noon, James W F Catto
BACKGROUND: Multimodal enhanced recovery after surgery (ERAS) regimens have improved outcomes from colorectal surgery. OBJECTIVE: We report the application of ERAS to patients undergoing radical cystectomy (RC). DESIGN, SETTING, AND PARTICIPANTS: Prospective collection of outcomes from consecutive patients undergoing RC at a single institution. INTERVENTION: Twenty-six components including prehabilitation exercise, same day admission, carbohydrate fluid loading, targeted intraoperative fluid resuscitation, regional local anaesthesia, cessation of nasogastric tubes, omitting oral bowel preparation, avoiding drain use, early mobilisation, chewing gum use, and audit...
August 8, 2017: European Urology
https://www.readbyqxmd.com/read/28797298/community-characteristics-of-the-gut-microbiomes-of-competitive-cyclists
#5
Lauren M Petersen, Eddy J Bautista, Hoan Nguyen, Blake M Hanson, Lei Chen, Sai H Lek, Erica Sodergren, George M Weinstock
BACKGROUND: Changes in diet and exercise can alter the gut microbiome of humans and mice; however, few studies to date have assessed the microbiomes of highly fit athletes. In this pilot study, we used metagenomic whole genome shotgun (mWGS) and metatranscriptomic (RNA-Seq) sequencing to show what organisms are both present and active in the gut microbiomes of both professional and amateur level competitive cyclists and to determine if any significant differences exist between these two groups...
August 10, 2017: Microbiome
https://www.readbyqxmd.com/read/28795013/management-of-diabetes-mellitus-in-children-and-adolescents-engaging-in-physical-activity
#6
REVIEW
Silpa Nadella, Justin A Indyk, Manmohan K Kamboj
Regular physical activity is an important component in the management of both type 1 and type 2 diabetes mellitus (T1DM and T2DM), as it has the potential to improve glycemic control, delay cardiovascular complications, and increase overall well-being. Unfortunately, many children and adolescents with diabetes do not partake in regular exercise and physical activity for multiple reasons. This review identifies the barriers to participation from the aspect of the patient, caregiver, and the healthcare provider...
July 2017: Translational pediatrics
https://www.readbyqxmd.com/read/28790922/exercise-preserves-lean-mass-and-performance-during-severe-energy-deficit-the-role-of-exercise-volume-and-dietary-protein-content
#7
Jose A L Calbet, Jesús G Ponce-González, Jaime de La Calle-Herrero, Ismael Perez-Suarez, Marcos Martin-Rincon, Alfredo Santana, David Morales-Alamo, Hans-Christer Holmberg
The loss of fat-free mass (FFM) caused by very-low-calorie diets (VLCD) can be attenuated by exercise. The aim of this study was to determine the role played by exercise and dietary protein content in preserving the lean mass and performance of exercised and non-exercised muscles, during a short period of extreme energy deficit (~23 MJ deficit/day). Fifteen overweight men underwent three consecutive experimental phases: baseline assessment (PRE), followed by 4 days of caloric restriction and exercise (CRE) and then 3 days on a control diet combined with reduced exercise (CD)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28770221/impact-of-carbohydrate-electrolyte-beverage-ingestion-on-heart-rate-response-while-climbing-mountain-fuji-at-3000%C3%A2-m
#8
Masahiro Horiuchi, Junko Endo, Koichi Kondo, Tadashi Uno, Mayuko Morikawa, Hiroshi Nose
We sought to investigate whether carbohydrate-electrolyte beverage ingestion reduced heart rate (HR) in twenty-three healthy young adults while climbing Mount Fuji at a given exercise intensity. Twenty-three healthy adults were randomly divided into two groups: the tap water (11 males [M] and 1 female [F]) and the carbohydrate-electrolyte group (10 M and 1 F). HR and activity energy expenditure (AEE) were recorded every min. The HRs for the first 30 minutes of climbing were not significantly different between the groups [121 ± 2 beats per min (bpm) in the tap water and 116 ± 3 bpm in the carbohydrate-electrolyte]; however, HR significantly increased with climbing in the tap water group (129 ± 2 bpm) but showed no significant increase in the carbohydrate-electrolyte group (121 ± 3 bpm)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28767524/endurance-exercise-attenuates-postprandial-whole-body-leucine-balance-in-trained-men
#9
Michael Mazzulla, Justin T Parel, Joseph W Beals, Stephan van Vliet, Sidney Abou Sawan, Daniel W D West, Scott A Paluska, Alexander V Ulanov, Daniel R Moore, Nicholas A Burd
PURPOSE: Endurance exercise increases indices of small intestinal damage and leucine oxidation, which may attenuate dietary amino acid appearance and postprandial leucine balance during postexercise recovery. Therefore, the purpose of this study was to examine the impact of an acute bout of endurance exercise on postprandial leucine kinetics and net leucine balance. METHODS: In a crossover design, seven trained young men (age = 25.6 ± 2.3 y; VO2peak = 61.4 ± 2...
July 31, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28754911/chondroitin-sulfate-disaccharides-modified-the-structure-and-function-of-the-murine-gut-microbiome-under-healthy-and-stressed-conditions
#10
Fang Liu, Na Zhang, Zhaojie Li, Xiong Wang, Hongjie Shi, Changhu Xue, Robert W Li, Qingjuan Tang
Chondroitin sulfate (CS) has been widely used for medical and nutraceutical purposes due to its roles in maintaining tissue structural integrity. We investigated if CS disaccharides may act as a bioactive compound and modulate gut microbial composition in mice. Our data show that CS disaccharides supplementation for 16 days significantly reduced blood LPS in the mice experiencing exhaustive exercise stress. CS disaccharides partially restored total fecal short-chain fatty acids from the level significantly repressed in mice under the stress...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28723843/no-superior-adaptations-to-carbohydrate-periodization-in-elite-endurance-athletes
#11
Kasper Degn Gejl, Line Thams, Mette Hansen, Torben Rokkedal-Lausch, Peter Plomgaard, Lars Nybo, Filip J Larsen, Daniele A Cardinale, Kurt Jensen, Hans-Christer Holmberg, Kristian Vissing, Niels Ørtenblad
PURPOSE: The present study investigated the effects of periodic CHO restriction on endurance performance and metabolic markers in elite endurance athletes. METHODS: Twenty-six male elite endurance athletes (VO2max: 65.0 ml O2[BULLET OPERATOR]kg[BULLET OPERATOR]min) completed 4 weeks of regular endurance training, while matched and randomized into two groups training with (Low) or without (High) carbohydrate (CHO) manipulation three days a week. The CHO manipulation days consisted of a 1-hr high intensity bike session in the morning, recovery for 7 hrs while consuming isocaloric diets containing either high CHO (414±2...
July 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28721837/effects-of-progressive-resistance-training-combined-with-a-protein-enriched-lean-red-meat-diet-on-health-related-quality-of-life-in-elderly-women-secondary-analysis-of-a-4-month-cluster-randomised-controlled-trial
#12
RANDOMIZED CONTROLLED TRIAL
Susan J Torres, Sian Robinson, Liliana Orellana, Stella L O'Connell, Carley A Grimes, Niamh L Mundell, David W Dunstan, Caryl A Nowson, Robin M Daly
Resistance training (RT) and increased dietary protein are recommended to attenuate age-related muscle loss in the elderly. This study examined the effect of a lean red meat protein-enriched diet combined with progressive resistance training (RT+Meat) on health-related quality of life (HR-QoL) in elderly women. In this 4-month cluster randomised controlled trial, 100 women aged 60-90 years (mean 73 years) from self-care retirement villages participated in RT twice a week and were allocated either 160 g/d (cooked) lean red meat consumed across 2 meals/d, 6 d/week or ≥1 serving/d (25-30 g) carbohydrates (control group, CRT)...
June 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28715881/comparison-of-bone-metabolism-based-on-the-different-ages-and-competition-levels-of-junior-and-high-school-female-rhythmic-gymnasts
#13
Taewoong Oh, Tatsuki Naka
PURPOSE: This study was to clarify the effect of age and competition level by measuring bone metabolism markers and bone mineral density measurements of junior high school and high school female rhythmic gymnasts, who restrict their diets to maintain a low body weight, while routinely undertaking long hours of high-intensity exercise, comparing the gymnasts based on their elite/non-elite. METHODS: The study investigated 7 junior high school and 12 high school female rhythmic gymnasts...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28711517/prevention-of-type-2-diabetes-mellitus-in-polycystic-ovary-syndrome-a-review
#14
REVIEW
Safa Anwar, Nigar Shikalgar
Polycystic ovary syndrome (PCOS) is recognized as one of the most common endocrinopathies in women of reproductive age, associated with metabolic sequelae which includes increased risk factors for impaired glucose tolerance (IGT), type 2 diabetes mellitus (DM2) and cardiovascular disease (CVD). The adverse effects of DM2 affects a woman throughout her lifespan. Health care expenditure of DM2 highlights the need for prevention through appropriate screening, diagnosis and intervention. Lifestyle modification (LSM) programs that include diet and/or physical activity are suggested for patients characterized as prediabetic to delay the onset of adult DM2...
July 8, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28708478/diabetes-with-obesity-is-there-an-ideal-diet
#15
REVIEW
Zahrae Sandouk, M Cecilia Lansang
For individuals who are overweight or obese, weight loss is effective in preventing and improving the management of type 2 diabetes. Together with other lifestyle factors like exercise and behavior modification, diet plays a central role in achieving weight loss. Diets vary based on the type and amount of carbohydrate, fat, and protein consumed to meet daily caloric intake goals. A number of popular diets are reviewed as well as studies evaluating the effect of various diets on weight loss, diabetes, and cardiovascular risk factors...
July 2017: Cleveland Clinic Journal of Medicine
https://www.readbyqxmd.com/read/28706467/ketogenic-diet-benefits-body-composition-and-well-being-but-not-performance-in-a-pilot-case-study-of-new-zealand-endurance-athletes
#16
Caryn Zinn, Matthew Wood, Mikki Williden, Simon Chatterton, Ed Maunder
BACKGROUND: Low-carbohydrate, high-fat and ketogenic diets are increasingly adopted by athletes for body composition and sports performance enhancements. However, as yet, there is no consensus on their efficacy in improving performance. There is also no comprehensive literature on athletes' experiences while undertaking this diet. The purpose of this pilot work was two-fold: i. to examine the effects of a non-calorie controlled ketogenic diet on body composition and performance outcomes of endurance athletes, and ii...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28702809/beta2-adrenergic-stimulation-increases-energy-expenditure-at-rest-but-not-during-submaximal-exercise-in-active-overweight-men
#17
Johan Onslev, Glenn Jacobson, Christian Narkowicz, Vibeke Backer, Anders Kalsen, Michael Kreiberg, Søren Jessen, Jens Bangsbo, Morten Hostrup
PURPOSE: β2-Agonists have been proposed as weight-loss treatment, because they elevate energy expenditure. However, it is unknown what effect β2-agonists have on energy expenditure in overweight individuals. Furthermore, the influence of β2-agonist R- and S-enantiomer ratio for the increased energy expenditure is insufficiently explored. METHODS: Nineteen males were included in the study of which 14 completed. Subjects were 31.6 (±3.5) years [mean (±95% CI)] and had a fat percentage of 22...
July 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28696986/fueling-the-triathlete-evidence-based-practical-advice-for-athletes-of-all-levels
#18
Andrew R Getzin, Cynthia Milner, Marie Harkins
Triathletes need to effectively fuel during training and racing to maximize their potential for success. While most research on fueling has focused on elite male triathletes, triathlon participation encompasses a broader demographic of racers ranging from those with aspirations of winning to those whose goals are completion. Carbohydrate is the primary macronutrient for fueling endurance activities. Athletes can usually tolerate 60 to 90 mg·h in the form of multiple different carbohydrate sources. Athletes should drink as thirst dictates and consider sodium replacement of sweat loss especially in individuals with a history of exercise-associated muscle cramps...
July 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28694500/resistance-exercise-initiates-mechanistic-target-of-rapamycin-mtor-translocation-and-protein-complex-co-localisation-in-human-skeletal-muscle
#19
Zhe Song, Daniel R Moore, Nathan Hodson, Carl Ward, Jessica R Dent, Mary F O'Leary, Andrew M Shaw, D Lee Hamilton, Sovan Sarkar, Yann-Gaël Gangloff, Troy A Hornberger, Lawrence L Spriet, George J Heigenhauser, Andrew Philp
The mechanistic target of rapamycin (mTOR) is a central mediator of protein synthesis in skeletal muscle. We utilized immunofluorescence approaches to study mTOR cellular distribution and protein-protein co-localisation in human skeletal muscle in the basal state as well as immediately, 1 and 3 h after an acute bout of resistance exercise in a fed (FED; 20 g Protein/40 g carbohydrate/1 g fat) or energy-free control (CON) state. mTOR and the lysosomal protein LAMP2 were highly co-localised in basal samples...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28692687/exercise-before-breakfast-increases-24-h-fat-oxidation-in-female-subjects
#20
Kaito Iwayama, Ryosuke Kawabuchi, Yoshiharu Nabekura, Reiko Kurihara, Insung Park, Masashi Kobayashi, Hitomi Ogata, Momoko Kayaba, Naomi Omi, Makoto Satoh, Kumpei Tokuyama
BACKGROUND: Exercise performed in a postprandial state does not increase 24-h fat oxidation of male and female subjects. Conversely, it has been shown in male subjects that exercise performed in a postabsorptive state increases 24-h fat oxidation compared with that in sedentary control and that with exercise trials performed after breakfast, lunch, or dinner. There is a paucity of study evaluating the effect of exercise performed in a postabsorptive state in female subjects. METHOD: Nine young female subjects participated in indirect calorimetry measurement over 24-h using a room-size metabolic chamber in which subjects remained sedentary or performed 60 min exercise before breakfast at 50% of [Formula: see text]...
2017: PloS One
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