Read by QxMD icon Read

pre-exercise carbohydrate

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
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
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
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
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
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
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
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
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
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
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
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
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
Daniel A Baur, Brandon D Willingham, Kyle A Smith, Jacob N Kisiolek, Margaret C Morrissey, Patrick G Saracino, Tristan J Ragland, Michael J Ormsbee
PURPOSE: To determine the impact of pre-exercise carbohydrate of different glycemic indices on subcutaneous abdominal adipose tissue (SCAAT) metabolism and running performance. METHODS: Ten trained male runners completed three experimental trials consisting of 30 min at 60% VO2max, 30 min at 75% VO2max, and a 5-km time trial (TT). Thirty min prior to exercise, participants consumed one of three beverages: 1) 75 g low glycemic index modified starch supplement (UCAN), 2) 75 g high glycemic index glucose-based supplement (G), or 3) a flavor-matched non-caloric placebo (PL)...
November 20, 2017: Medicine and Science in Sports and Exercise
Sulin Cheng, Jun Ge, Can Zhao, Shenglong Le, Yifan Yang, Dandan Ke, Na Wu, Xiao Tan, Xiaobo Zhang, Xiaming Du, Jianqin Sun, Renwei Wang, Yongyong Shi, Ronald J H Borra, Riitta Parkkola, Petri Wiklund, Dajiang Lu
The study aimed to assess whether aerobic exercise (AEx) training and a fibre-enriched diet can reduce hepatic fat content (HFC) and increase glycaemic control in pre-diabetic patients with non-alcoholic fatty liver disease (NAFLD). Six-hundred-and-three patients from seven clinics in Yangpu district, Shanghai, China were recruited. Of them 115 individuals aged 50-65-year fulfilled the inclusion criteria (NAFLD with impaired fasting glucose or impaired glucose tolerance) and were randomly assigned into exercise (AEx n = 29), diet (Diet n = 28), exercise plus diet (AED n = 29), or no-intervention (NI n = 29) groups...
November 21, 2017: Scientific Reports
Jill J Leckey, Megan L Ross, Marc Quod, John A Hawley, Louise M Burke
We investigated the effect of pre- "race" ingestion of a 1,3-butanediol acetoacetate diester on blood ketone concentration, substrate metabolism and performance of a cycling time trial (TT) in professional cyclists. In a randomized cross-over design, 10 elite male cyclists completed a ~31 km laboratory-based TT on a cycling ergometer programmed to simulate the 2017 World Road Cycling Championships course. Cyclists consumed a standardized meal [2 g/kg body mass (BM) carbohydrate (CHO)] the evening prior to a trial day and a CHO breakfast (2 g/kg BM CHO) with 200 mg caffeine on the morning of a trial day...
2017: Frontiers in Physiology
Meghan A Brown, Emma J Stevenson, Glyn Howatson
A number of different forms of protein and their analogues have been investigated for their efficacy in ameliorating exercise-induced muscle damage (EIMD) and recovery. Preliminary data regarding whey protein hydrolysate (WPH) supplementation are promising. However, its efficacy beyond acute eccentric/resistance exercise bouts or longer-term training programmes are limited and all investigations have been conducted in male or mixed-sex groups. This study sought to elucidate whether the benefits of WPH previously reported can be demonstrated in females following repeated-sprint exercise...
November 6, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Hunter S Waldman, Ben M Krings, Steven A Basham, JohnEric W Smith, Brent J Fountain, Matthew J McAllister
Waldman, HS, Krings, BM, Basham, SA, Smith, JW, Fountain, BJ, and McAllister, MJ. Effects of a 15-day low carbohydrate, high-fat diet in resistance-trained men. J Strength Cond Res XX(X): 000-000, 2017-This study examined the effects of a 15-day isocaloric low carbohydrate (<25% E), high-fat (>50% E) (LCHF) diet on physiological and metabolic alterations in resistance-trained (RT) men. College-aged RT men (n = 11) completed 4 V[Combining Dot Above]O2max tests using treadmill every 5 days during the 15-day trial...
October 20, 2017: Journal of Strength and Conditioning Research
Lu Qin, Stephen H S Wong, Feng-Hua Sun, Yu Huang, Sinead Sheridan, Cindy H P Sit
This study compared the effect of alpha-lactalbumin and whey protein on muscle damage, muscle pain, and mood states during short term recovery following strenuous prolonged exercise. In a two-stage crossover counterbalanced design, 12 endurance male runners were recruited (age: 30.4 ± 2.8 year, height: 172.7 ± 5.6 cm, body mass: 66.7 ± 6.5 kg, VO2max: 58.0 ± 6.9 ml/kg(-)/min), ran for 90 min at 70% VO2max, and followed by a 4-h recovery. Two treatments (carbohydrate+alpha-lactalbumin, CA; carbohydrate+whey protein isolate, CW) were applied during the main trials...
2017: Frontiers in Physiology
Kai Schenk, Mario Bizzini, Hannes Gatterer
Referees are an integral part of soccer and their performance is fundamental for regular match flow, irrespective of the competition level or age classes. So far, scientific interest was mainly limited to aspects of exercise physiology and match performance of soccer referees, whereas recommendations for nutrition were adopted from active professional soccer. In contrast to elite soccer players most referees are non-professional and engaged in different occupations. Furthermore, elite referees and soccer players differ in regard to age, body composition, aerobic capacity and training load...
October 5, 2017: Scandinavian Journal of Medicine & Science in Sports
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"