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https://www.readbyqxmd.com/read/29757056/whey-protein-augments-leucinemia-and-post-exercise-p70s6k1-activity-compared-to-a-hydrolysed-collagen-blend-when-in-recovery-from-training-with-low-carbohydrate-availability
#1
Samuel G Impey, Kelly M Hammond, Robert Naughton, Carl Langan-Evans, Sam O Shepherd, Adam P Sharples, Jessica Cegielski, Kenneth Smith, Stewart Jeromson, D Lee Hamilton, Graeme L Close, James P Morton
We examined the effects of whey versus collagen protein on skeletal muscle cell signalling responses associated with mitochondrial biogenesis and protein synthesis in recovery from an acute training session completed with low carbohydrate (CHO) availability. In a repeated measures design (after adhering to a 36-h exercise-dietary intervention to standardise pre-exercise muscle glycogen), eight males completed a 75-min non-exhaustive cycling protocol and consumed 22 g of a hydrolysed collagen blend (COLLAGEN) or whey (WHEY) protein 45 min prior to exercise, 22 g during exercise and 22 g immediately post-exercise...
May 14, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29619595/new-zealand-blackcurrant-extract-enhances-fat-oxidation-during-prolonged-cycling-in-endurance-trained-females
#2
Juliette A Strauss, Mark E T Willems, Sam O Shepherd
PURPOSE: New Zealand blackcurrant (NZBC) extract has previously been shown to increase fat oxidation during prolonged exercise, but this observation is limited to males. We examined whether NZBC intake also increases fat oxidation during prolonged exercise in females, and whether this was related to greater concentrations of circulating fatty acids. METHODS: In a randomised, crossover, double-blind design, 16 endurance-trained females (age: 28 ± 8 years, BMI: 21...
April 4, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29590260/effect-of-pre-exercise-carbohydrate-availability-on-fat-oxidation-and-energy-expenditure-after-a-high-intensity-exercise
#3
COMPARATIVE STUDY
G A Ferreira, L C Felippe, R L S Silva, R Bertuzzi, F R De Oliveira, F O Pires, A E Lima-Silva
The aim of this study was to test the hypothesis that reduced pre-exercise carbohydrate (CHO) availability potentiates fat oxidation after an exhaustive high-intensity exercise bout. Eight physically active men underwent a high-intensity exercise (∼95% V̇O2max) until exhaustion under low or high pre-exercise CHO availability. The protocol to manipulate pre-exercise CHO availability consisted of a 90-min cycling bout at ∼70% V̇O2max + 6 × 1-min at 125% V̇O2max with 1-min rest, followed by 48 h under a low- (10% CHO, low-CHO availability) or high-CHO diet (80% CHO, high-CHO availability)...
March 26, 2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29574525/the-putative-leucine-sensor-sestrin2-is-hyperphosphorylated-by-acute-resistance-exercise-but-not-protein-ingestion-in-human-skeletal-muscle
#4
Nina Zeng, Randall F D'Souza, Brie Sorrenson, Troy L Merry, Matthew P G Barnett, Cameron J Mitchell, David Cameron-Smith
PURPOSE: Dietary protein and resistance exercise (RE) are both potent stimuli of the mammalian target of rapamycin complex 1 (mTORC1). Sestrins1, 2, 3 are multifunctional proteins that regulate mTORC1, stimulate autophagy and alleviate oxidative stress. Of this family, Sestrin2 is a putative leucine sensor implicated in mTORC1 and AMP-dependent protein kinase (AMPK) regulation. There is currently no data examining the responsiveness of Sestrin2 to dietary protein ingestion, with or without RE...
March 24, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29568273/regular-aerobic-resistance-and-cross-training-exercise-prevents-reduced-vascular-function-following-a-high-sugar-or-high-fat-mixed-meal-in-young-healthy-adults
#5
Emon K Das, Pui Y Lai, Austin T Robinson, Joan Pleuss, Mohamed M Ali, Jacob M Haus, David D Gutterman, Shane A Phillips
The postprandial state can negatively influence flow mediated dilation (FMD), a predictor of atherosclerosis and cardiovascular disease. This investigation was designed to determine the effect of regular aerobic and/or resistance exercise on postprandial FMD after a high sugar or high fat mixed meal. Forty-five healthy participants were recruited from one of four groups: lean sedentary (SED), runners, weight lifters, and cross-trainers. Participants were randomly crossed over to a high sugar meal (HSM) and a high fat mixed meal (HFMM; both fat and carbohydrate)...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29566095/metabolic-recovery-from-heavy-exertion-following-banana-compared-to-sugar-beverage-or-water-only-ingestion-a-randomized-crossover-trial
#6
David C Nieman, Nicholas D Gillitt, Wei Sha, Debora Esposito, Sivapriya Ramamoorthy
OBJECTIVES AND METHODS: Using a randomized, crossover, counterbalanced approach, cyclists (N = 20, overnight fasted state) engaged in the four 75-km time trials (2-week washout) while ingesting two types of bananas with similar carbohydrate (CHO) but different phenolic content (Cavendish, CAV; mini-yellow, MIY, 63% higher polyphenols), a 6% sugar beverage (SUG), and water only (WAT). CHO intake was set at 0.2 g/kg every 15 minutes. Blood samples were collected pre-exercise and 0 h-, 0...
2018: PloS One
https://www.readbyqxmd.com/read/29548770/comparison-of-sports-drink-versus-oral-rehydration-solution-during-exercise-in-the-heat
#7
Michael W Schleh, Charles L Dumke
INTRODUCTION: This study compared 2 commercially available beverages, an oral rehydration solution (ORS; 60.9 mM Na+ ; 3.4% carbohydrate) and a sports drink (SDS; 18.4 mM Na+; 5.9% carbohydrate), on hydration and metabolism during submaximal exercise in the heat. METHODS: Ten male subjects completed two 90-min exercise trials (39ºC, 30%) of walking at 50% VO2max followed by a 30-min rest period in the heat while wearing wildland firefighter personal protective clothing...
March 13, 2018: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/29544062/ingestion-of-carbohydrate-or-carbohydrate-plus-protein-does-not-enhance-performance-during-endurance-exercise-a-randomized-cross-over-placebo-controlled-clinical-trial
#8
Débora Finger, Fábio Juner Lanferdini, Juliano Boufleur Farinha, Clarissa Müller Brusco, Lucas Helal, Francesco Pinto Boeno, Eduardo Lusa Cadore, Ronei Silveira Pinto
INTRODUCTION: Protein (PRO) combined with a carbohydrate (CHO) beverage may have an ergogenic effect on endurance performance. However, evidence regarding its efficacy on similar conditions to athletes' race day is still lacking. OBJECTIVE: To compare the effect of three different nutritional supplementation strategies on performance and muscle recovery in a duathlon protocol. METHODS: , 13 male athletes (29.7 ± 7.7 years) participated in three simulated Olympic-distance duathlons under three different, randomly assigned, supplementation regimens: carbohydrate drink (CHO, 75 g); isocaloric CHO plus protein drink (CHO+PRO, 60...
March 15, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29534444/protein-supplementation-during-or-following-a-marathon-run-influences-post-exercise-recovery
#9
Michael J Saunders, Nicholas D Luden, Cash R DeWitt, Melinda C Gross, Amanda Dillon Rios
The effects of protein supplementation on the ratings of energy/fatigue, muscle soreness [ascending (A) and descending (D) stairs], and serum creatine kinase levels following a marathon run were examined. Variables were compared between recreational male and female runners ingesting carbohydrate + protein (CP) during the run (CPDuring , n = 8) versus those that were consuming carbohydrate (CHODuring, n = 8). In a second study, outcomes were compared between subjects who consumed CP or CHO immediately following exercise [CPPost ( n = 4) versus CHOPost ( n = 4)]...
March 10, 2018: Nutrients
https://www.readbyqxmd.com/read/29463034/chronic-ketogenic-low-carbohydrate-high-fat-diet-has-minimal-effects-on-acid-base-status-in-elite-athletes
#10
Amelia J Carr, Avish P Sharma, Megan L Ross, Marijke Welvaert, Gary J Slater, Louise M Burke
Although short (up to 3 days) exposure to major shifts in macronutrient intake appears to alter acid-base status, the effects of sustained (>1 week) interventions in elite athletes has not been determined. Using a non-randomized, parallel design, we examined the effect of adaptations to 21 days of a ketogenic low carbohydrate high fat (LCHF) or periodized carbohydrate (PCHO) diet on pre- and post-exercise blood pH, and concentrations of bicarbonate (HCO₃- ) and lactate (La- ) in comparison to a high carbohydrate (HCHO) control...
February 18, 2018: Nutrients
https://www.readbyqxmd.com/read/29462969/milk-an-effective-recovery-drink-for-female-athletes
#11
Paula Rankin, Adrian Landy, Emma Stevenson, Emma Cockburn
Milk has become a popular post-exercise recovery drink. Yet the evidence for its use in this regard comes from a limited number of investigations utilising very specific exercise protocols, and mostly with male participants. Therefore, the aim of this study was to investigate the effects of post-exercise milk consumption on recovery from a sprinting and jumping protocol in female team-sport athletes. Eighteen females participated in an independent-groups design. Upon completion of the protocol participants consumed 500 mL of milk (MILK) or 500 mL of an energy-matched carbohydrate (CHO) drink...
February 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29434550/select-skeletal-muscle-mrnas-related-to-exercise-adaptation-are-minimally-affected-by-different-pre-exercise-meals-that-differ-in-macronutrient-profile
#12
Pim Knuiman, Maria T E Hopman, Jeroen A Wouters, Marco Mensink
Background: Substantial research has been done on the impact of carbohydrate and fat availability on endurance exercise adaptation, though its role in the acute adaptive response to resistance exercise has yet to be fully characterized. Purpose: We aimed to assess the effects of a pre-resistance exercise isocaloric mixed meal containing different amounts of carbohydrates and fat, on post-resistance exercise gene expression associated with muscle adaptation. Methods: Thirteen young (age 21.2 ± 1.6 year), recreationally trained (VO2max 51...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29434529/high-protein-consumption-in-trained-women-bad-to-the-bone
#13
RANDOMIZED CONTROLLED TRIAL
Jose Antonio, Anya Ellerbroek, Cassandra Evans, Tobin Silver, Corey A Peacock
Background: It has been posited that the consumption of extra protein (> 0.8 g/kg/d) may be deleterious to bone mineral content. However, there is no direct evidence to show that consuming a high-protein diet results in a demineralization of the skeleton. Thus, the primary endpoint of this randomized controlled trial was to determine if a high-protein diet affected various parameters of whole body and lumbar bone mineral content in exercise-trained women. Methods: Twenty-four women volunteered for this 6-month investigation ( n  = 12 control, n = 12 high-protein)...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29431534/organisation-of-dietary-control-for-nutrition-training-intervention-involving-periodized-carbohydrate-cho-availability-and-ketogenic-low-cho-high-fat-lchf-diet
#14
Joanne G Mirtschin, Sara F Forbes, Louise E Cato, Ida A Heikura, Nicki Strobel, Rebecca Hall, Louise M Burke
We describe the implementation of a 3-week dietary intervention in elite race walkers at the Australian Institute of Sport, with a focus on the resources and strategies needed to accomplish a complex study of this scale. Interventions involved: traditional guidelines of high carbohydrate (CHO) availability for all training sessions (HCHO); a periodized CHO diet which integrated sessions with low CHO and high CHO availability within the same total CHO intake, and a ketogenic low-CHO high-fat diet (LCHF). 7-day menus and recipes were constructed for a communal eating setting to meet nutritional goals as well as individualized food preferences and special needs...
February 12, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29394488/effect-of-7-days-of-exercise-on-exogenous-carbohydrate-oxidation-and-insulin-resistance-in-children-with-obesity
#15
Lisa Chu, Katherine M Morrison, Michael C Riddell, Sandeep Raha, Brian W Timmons
PURPOSE: The capacity to match carbohydrate (CHO) oxidation with CHO availability (deemed metabolic flexibility (MetFlex)) may be important for type 2 diabetes prevention. In adults, impaired MetFlex is associated with insulin resistance (IR), which can be improved with as little as 7 days of exercise. Whether this occurs similarly in children is unknown. We hypothesized 7 consecutive days of exercise would improve MetFlex and IR in children with obesity. METHODS: Twelve children (8 boys, 4 girls) completed 2 study visits before (PRE) and 2 study visits after (POST) exercise training...
February 2, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29382142/the-influence-of-pre-exercise-glucose-versus-fructose-ingestion-on-subsequent-postprandial-lipemia
#16
Tsung-Jen Yang, Chih-Hui Chiu, Mei-Hui Tseng, Cheng-Kang Chang, Ching-Lin Wu
Ingestion of low glycemic index (LGI) carbohydrate (CHO) before exercise induced less insulin response and higher fat oxidation than that of high GI (HGI) CHO during subsequent exercise. However, the effect on the subsequent postprandial lipid profile is still unclear. Therefore, the aim of this study was to investigate ingestion of CHO drinks with different GI using fructose and glucose before endurance exercise on the subsequent postprandial lipid profile. Eight healthy active males completed two experimental trials in randomized double-blind cross-over design...
January 29, 2018: Nutrients
https://www.readbyqxmd.com/read/29262272/effects-of-carbohydrate-mouth-rinse-and-caffeine-on-high-intensity-interval-running-in-a-fed-state
#17
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/29225317/pre-exercise-high-fat-diet-for-3-days-affects-post-exercise-skeletal-muscle-glycogen-repletion
#18
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/29200984/mouth-rinsing-with-a-carbohydrate-solution-attenuates-exercise-induced-decline-in-executive-function
#19
RANDOMIZED CONTROLLED TRIAL
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% V̇O2 max with two mouth-rinsing conditions: with a carbohydrate solution (CHO) or with water (CON)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29170704/a-pre-exercise-dose-of-melatonin-can-alter-substrate-use-during-exercise
#20
Cardyl P Trionfante, Greggory R Davis, Tyler M Farney, Ryan W Miskowiec, Arnold G Nelson
Notwithstanding the lack of exercise research, several reviews have championed the use of melatonin to combat metabolic syndrome. Therefore, this study compared substrate utilization during a 30-minute (min) graded exercise protocol following the ingestion of either 6 mg melatonin (M) or a placebo (P). Participants (12 women, 12 men) performed stages 1-5 of the Naughton graded exercise protocol (6 min per stage). The protocol was repeated 4 times (2x M, 2x P) at the same time of day with one week separating each session...
2017: International Journal of Exercise Science
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