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https://www.readbyqxmd.com/read/29352196/hyper-hippocampal-glycogen-induced-by-glycogen-loading-with-exhaustive-exercise
#1
Mariko Soya, Takashi Matsui, Takeru Shima, Subrina Jesmin, Naomi Omi, Hideaki Soya
Glycogen loading (GL), a well-known type of sports conditioning, in combination with exercise and a high carbohydrate diet (HCD) for 1 week enhances individual endurance capacity through muscle glycogen supercompensation. This exercise-diet combination is necessary for successful GL. Glycogen in the brain contributes to hippocampus-related memory functions and endurance capacity. Although the effect of HCD on the brain remains unknown, brain supercompensation occurs following exhaustive exercise (EE), a component of GL...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29345166/effects-of-coffee-components-on-muscle-glycogen-recovery-a-systematic-review
#2
Laís Monteiro Rodrigues Loureiro, Caio Eduardo Gonçalves Reis, Teresa Helena Macedo da Costa
Coffee is one of the most consumed beverages in the world and it can improve insulin sensitivity, stimulating glucose uptake in skeletal muscle when adequate carbohydrate intake is observed. The aim of this review is to analyze the effects of coffee and coffee components on muscle glycogen metabolism. A literature search was conducted according to PRISMA and seven studies were included. They explored the effects of coffee components on various substances and signaling proteins. In one of the studies with humans, caffeine was shown to increase glucose levels, Ca2+/calmodulin-dependent protein kinase (CaMK) phosphorylation, glycogen resynthesis rates and glycogen accumulation after exercise...
January 18, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29344008/understanding-the-factors-that-effect-maximal-fat-oxidation
#3
REVIEW
Troy Purdom, Len Kravitz, Karol Dokladny, Christine Mermier
Lipids as a fuel source for energy supply during submaximal exercise originate from subcutaneous adipose tissue derived fatty acids (FA), intramuscular triacylglycerides (IMTG), cholesterol and dietary fat. These sources of fat contribute to fatty acid oxidation (FAox) in various ways. The regulation and utilization of FAs in a maximal capacity occur primarily at exercise intensities between 45 and 65% VO2max, is known as maximal fat oxidation (MFO), and is measured in g/min. Fatty acid oxidation occurs during submaximal exercise intensities, but is also complimentary to carbohydrate oxidation (CHOox)...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29334582/carbohydrate-mouth-rinsing-does-not-prevent-the-decline-in-maximal-strength-following-fatiguing-exercise
#4
Christopher D Black, Daniel J Schubert, Marcin K Szczyglowski, Joshua D Wren
Carbohydrate (CHO) rinsing has been shown to attenuate the decline of maximal voluntary contractions (MVC) following fatiguing exercise-perhaps via a central mechanism. This study sought to determine the effect of a CHO rinse on MVC, voluntary activation, and contractile properties following fatiguing exercise. Thirteen adults participated in a double-blind, cross-over study. MVC of the dominant knee extensors was assessed and voluntary activation (%VA) was determined using twitch-interpolation. Participants then held 50% of MVC until volitional fatigue followed by a 20s rinse with a solution of 8% maltodextrin (CHO) or placebo (PLA)...
January 12, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29333721/carbohydrate-dose-influences-liver-and-muscle-glycogen-oxidation-and-performance-during-prolonged-exercise
#5
Andy J King, John P O'Hara, Douglas J Morrison, Tom Preston, Roderick F G J King
This study investigated the effect of carbohydrate (CHO) dose and composition on fuel selection during exercise, specifically exogenous and endogenous (liver and muscle) CHO oxidation. Ten trained males cycled in a double-blind randomized order on 5 occasions at 77% V˙O2max for 2 h, followed by a 30-min time-trial (TT) while ingesting either 60 g·h-1 (LG) or 75 g·h-113 C-glucose (HG), 90 g·h-1 (LGF) or 112.5 g·h-113 C-glucose-13 C-fructose ([2:1] HGF) or placebo. CHO doses met or exceed reported intestinal transporter saturation for glucose and fructose...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29321394/-chrono-nutrition-and-n-3-polyunsaturated-fatty-acid
#6
Shigenobu Shibata, Akiko Furutani
Circadian clock system has been widely maintained in many spices from prokaryote to mammals. "Circadian" means "approximately day" in Latin, thus circadian rhythm means about 24 hour rhythms. The earth revolves once every 24 hours, and our circadian system has been developed for adjusting to this 24 hour cycles, to get sun light information for getting their foods or for alive in birds or mammals. We have two different circadian systems so-called main oscillator located in the suprachiasmatic nucleus (SCN) of the hypothalamus, and local oscillator located in the various peripheral organ tissues such as liver, kidney and skeletal muscle...
2018: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
https://www.readbyqxmd.com/read/29310579/gene-trait-matching-across-the-bifidobacterium-longum-pan-genome-reveals-considerable-diversity-in-carbohydrate-catabolism-among-human-infant-strains
#7
Silvia Arboleya, Francesca Bottacini, Mary O'Connell-Motherway, C Anthony Ryan, R Paul Ross, Douwe van Sinderen, Catherine Stanton
BACKGROUND: Bifidobacterium longum is a common member of the human gut microbiota and is frequently present at high numbers in the gut microbiota of humans throughout life, thus indicative of a close symbiotic host-microbe relationship. Different mechanisms may be responsible for the high competitiveness of this taxon in its human host to allow stable establishment in the complex and dynamic intestinal microbiota environment. The objective of this study was to assess the genetic and metabolic diversity in a set of 20 B...
January 8, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29301367/metabolic-responses-to-carbohydrate-ingestion-during-exercise-associations-between-carbohydrate-dose-and-endurance-performance
#8
Michael L Newell, Gareth A Wallis, Angus M Hunter, Kevin D Tipton, Stuart D R Galloway
Carbohydrate (CHO) ingestion during exercise lasting less than three hours improves endurance exercise performance but there is still debate about the optimal dose. We utilised stable isotopes and blood metabolite profiles to further examine metabolic responses to CHO (glucose only) ingestion in the 20-64 g·h-1 range, and to determine the association with performance outcome. In a double-blind, randomized cross-over design, male cyclists (n = 20, mean ± SD, age 34 ± 10 years, mass 75.8 ± 9 kg, peak power output 394 ± 36 W, VO2max 62 ± 9 mL·kg-1·min-1) completed four main experimental trials...
January 3, 2018: Nutrients
https://www.readbyqxmd.com/read/29299877/cocoa-flavanol-supplementation-and-exercise-a-systematic-review
#9
REVIEW
Lieselot Decroix, Danusa Dias Soares, Romain Meeusen, Elsa Heyman, Cajsa Tonoli
BACKGROUND: Cocoa flavanols (CFs) have antioxidant and anti-inflammatory capacities and can improve vascular function. It has recently been suggested that CF intake may improve exercise performance and recovery. This systematic review aimed to evaluate the literature on the effects of CF intake on exercise performance and recovery and exercise-induced changes in vascular function, cognitive function, oxidative stress, inflammation, and metabolic parameters. METHODS: Two electronic databases (Pubmed and Web of Science) were searched for studies examining the combination of CF intake and exercise in humans (up to 28 March 2017)...
January 3, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29285709/effects-of-dried-tofu-supplementation-during-interval-walking-training-on-the-methylation-of-the-nfkb2-gene-in-the-whole-blood-of-older-women
#10
Mayuko Morikawa, Sakura Nakano, Nobuo Mitsui, Hisashi Murasawa, Shizue Masuki, Hiroshi Nose
Muscle atrophy with aging is closely associated with chronic systemic inflammation and lifestyle-related diseases. Here, we assessed whether dried tofu intake during 5-month interval walking training (IWT) enhanced increases in thigh muscle mass and strength and ameliorated susceptibility to inflammation in older women. Subjects (n = 32, ~ 65 years) who performed IWT for > 6 months participated in this study. They were randomly divided into 2 groups: IWT + placebo intake (PLG, n = 16; 108 kcal, 0...
December 29, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29276860/cycling-efficiency-during-incremental-cycle-ergometry-after-24-hours-of-overfeeding-or-fasting
#11
Karyne L Vinales, Mathias C Schlögl, Martin Reinhardt, Marie S Thearle, Jonathan Krakoff, Paolo Piaggi
OBJECTIVE: The objective of this study was to determine whether net cycling efficiency (NET) is altered by 24-hour fasting or overfeeding and whether it correlates with dietary-related energy expenditure (EE) and future weight change. METHODS: In a crossover design, healthy subjects fasted or were overfed for 24 hours while in a whole-room calorimeter using five diets with doubled energy needs: standard, high-carbohydrate (75%), high-fat (60%), high-protein (30%), and low-protein (3%) diets...
December 25, 2017: Obesity
https://www.readbyqxmd.com/read/29262272/effects-of-carbohydrate-mouth-rinse-and-caffeine-on-high-intensity-interval-running-in-a-fed-state
#12
Simon Devenney, Shane Mangan, Marcus Shortall, Kieran Collins
The current study aims to identify if mouth rinsing with a 6% carbohydrate solution (CMR) and mouth rinsing and ingestion of caffeine (CMR+CAFF) can affect exercise performance during steady state (SS) running and high intensity intervals (HIT) in comparison to a 0% control solution (PLA), when in a fed state. Eight recreationally trained males completed three trials (CMR, CMR + CAFF, and PLA) of 45-min SS run and a HIT protocol (90% peak treadmill velocity) until fatigue in a double blinded, repeated measures study...
December 20, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29247343/a-caffeine-maltodextrin-mouth-rinse-counters-mental-fatigue
#13
Jeroen Van Cutsem, Kevin De Pauw, Samuele Marcora, Romain Meeusen, Bart Roelands
INTRODUCTION: Mental fatigue is a psychobiological state caused by prolonged periods of demanding cognitive activity that has negative implications on many aspects in daily life. Caffeine and carbohydrate ingestion have been shown to be able to reduce these negative effects of mental fatigue. Intake of these substances might however be less desirable in some situations (e.g., restricted caloric intake, Ramadan). Rinsing caffeine or glucose within the mouth has already been shown to improve exercise performance...
December 15, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29244956/effects-of-carbohydrate-and-branched-chain-amino-acid-beverage-ingestion-during-acute-upper-body-resistance-exercise-on-performance-and-post-exercise-hormone-response
#14
JohnEric W Smith, Ben M Krings, Brandon D Shepherd, Hunter S Waldman, Steven A Basham, Matthew J McAllister
The purpose of this investigation was to examine the individual and combined effects of ingesting carbohydrates (CHO) and branched chain amino acids (BCAA) during high volume upper-body resistance exercise (RE) on markers of catabolism and performance. Thirteen resistance trained males completed four experimental trials with supplementation ingesting beverages containing CHO, BCAA, CHO+BCAA, or placebo (PLA) in a randomized, double-blind design. The beverages were ingested in 118 mL servings six times during a ~60 min RE session consisting of bench press, bent-over row, incline press, and close-grip row...
December 15, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29232314/postexercise-fructose-maltodextrin-ingestion-enhances-subsequent-endurance-capacity
#15
Ed Maunder, Tim Podlogar, Gareth A Wallis
PURPOSE: Restoring skeletal muscle and hepatic glycogen content during short-term (<6 h) recovery from prolonged exercise is pertinent for athletes seeking to maximize performance in repeated exercise bouts. Previous research suggests co-ingestion of fructose-glucose carbohydrate sources augments hepatic and has equivalent effects on skeletal muscle glycogen storage during short-term recovery from prolonged exercise compared to isocaloric glucose ingestion. The aim of the present investigation was to determine if this has a discernible effect on subsequent exercise capacity...
December 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29232263/can-the-critically-ill-patient-generate-sufficient-energy-to-facilitate-exercise-in-the-icu
#16
Danielle E Bear, Selina M Parry, Zudin A Puthucheary
PURPOSE OF REVIEW: Trials of physical rehabilitation post critical illness have yet to deliver improved health-related quality of life in critical illness survivors. Muscle mass and strength are lost rapidly in critical illness and a proportion of patients continue to do so resulting in increased mortality and functional disability. Addressing this issue is therefore fundamental for recovery from critical illness. RECENT FINDINGS: Altered mitochondrial function occurs in the critically ill and is likely to result in decreased adenosine tri-phosphate (ATP) production...
December 9, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/29225317/pre-exercise-high-fat-diet-for-3-days-affects-post-exercise-skeletal-muscle-glycogen-repletion
#17
Yumiko Takahashi, Yutaka Matsunaga, Yuki Tamura, Shin Terada, Hideo Hatta
Previous studies have shown that the short-term intake of a high-fat diet (HFD) impairs glucose metabolism. In this study, we investigated the influences of pre-exercise HFD intake for 3 d on post-exercise glycogen repletion in skeletal muscle in ICR mice. Mice received either an HFD (57% kcal from fat, 23% kcal from carbohydrate; HFD group) or standard laboratory chow (13% kcal from fat, 60% kcal from carbohydrate; Con group) for 3 d before exercise. Mice performed treadmill running at 25 m/min for 60 min and were orally administered a glucose (2 mg/g body weight) solution immediately after and at 60 min after exercise...
2017: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/29224090/men-are-from-mars-women-are-from-venus-sex-differences-in-insulin-action-and-secretion
#18
Ananda Basu, Simmi Dube, Rita Basu
Sex difference plays a substantial role in the regulation of glucose metabolism in healthy glucose-tolerant humans. The factors which may contribute to the sex-related differences in glucose metabolism include differences in lifestyle (diet and exercise), sex hormones, and body composition. Several epidemiological and observational studies have noted that impaired glucose tolerance is more common in women than men. Some of these studies have attributed this to differences in body composition, while others have attributed impaired insulin sensitivity as a cause of impaired glucose tolerance in women...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29214461/co-ingestion-of-protein-or-a-protein-hydrolysate-with-carbohydrate-enhances-anabolic-signaling-but-not-glycogen-resynthesis-following-recovery-from-prolonged-aerobic-exercise-in-trained-cyclists
#19
Karl E Cogan, Mark Evans, Enzo Iuliano, Audrey Melvin, Davide Susta, Karl Neff, Giuseppe De Vito, Brendan Egan
PURPOSE: The effect of carbohydrate (CHO), or CHO supplemented with either sodium caseinate protein (CHO-C) or a sodium caseinate protein hydrolysate (CHO-H) on the recovery of skeletal muscle glycogen and anabolic signaling following prolonged aerobic exercise was determined in trained male cyclists [n = 11, mean ± SEM age 28.8 ± 2.3 years; body mass (BM) 75.0 ± 2.3 kg; VO2peak 61.3 ± 1.6 ml kg-1 min-1]. METHODS: On three separate occasions, participants cycled for 2 h at ~ 70% VO2peak followed by a 4-h recovery period...
December 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29200984/mouth-rinsing-with-a-carbohydrate-solution-attenuates-exercise-induced-decline-in-executive-function
#20
Kana Konishi, Tetsuya Kimura, Atsushi Yuhaku, Toshiyuki Kurihara, Masahiro Fujimoto, Takafumi Hamaoka, Kiyoshi Sanada
Background: A decline in executive function could have a negative influence on the control of actions in dynamic situations, such as sports activities. Mouth rinsing with a carbohydrate solution could serve as an effective treatment for preserving the executive function in exercise. The purpose of this study was to examine the effects of mouth rinsing with a carbohydrate solution on executive function after sustained moderately high-intensity exercise. Methods: Eight young healthy participants completed 65 min of running at 75% V̇O2max with two mouth-rinsing conditions: with a carbohydrate solution (CHO) or with water (CON)...
2017: Journal of the International Society of Sports Nutrition
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