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https://www.readbyqxmd.com/read/27899900/fiber-type-specific-satellite-cell-content-in-cyclists-following-heavy-training-with-carbohydrate-and-carbohydrate-protein-supplementation
#1
Alec I McKenzie, Andrew C D'Lugos, Michael J Saunders, Keith D Gworek, Nicholas D Luden
The central purpose of this study was to evaluate the fiber type-specific satellite cell and myonuclear responses of endurance-trained cyclists to a block of intensified training, when supplementing with carbohydrate (CHO) vs. carbohydrate-protein (PRO). In a crossover design, endurance-trained cyclists (n = 8) performed two consecutive training periods, once supplementing with CHO (de facto "control" condition) and the other with PRO. Each training period consisted of 10 days of intensified cycle training (ICT-120% increase in average training duration) followed by 10 days of recovery (RVT-reduced volume training; 33% volume reduction vs...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27798656/third-exposure-to-a-reduced-carbohydrate-meal-lowers-evening-postprandial-insulin-and-gip-responses-and-homa-ir-estimate-of-insulin-resistance
#2
Po-Ju Lin, Katarina T Borer
BACKGROUND: Postprandial hyperinsulinemia, hyperglycemia, and insulin resistance increase the risk of type 2 diabetes (T2D) and cardiovascular disease mortality. Postprandial hyperinsulinemia and hyperglycemia also occur in metabolically healthy subjects consuming high-carbohydrate diets particularly after evening meals and when carbohydrate loads follow acute exercise. We hypothesized the involvement of dietary carbohydrate load, especially when timed after exercise, and mediation by the glucose-dependent insulinotropic peptide (GIP) in this phenomenon, as this incretin promotes insulin secretion after carbohydrate intake in insulin-sensitive, but not in insulin-resistant states...
2016: PloS One
https://www.readbyqxmd.com/read/27783812/high-cho-diet-increases-post-exercise-oxygen-consumption-after-a-supramaximal-exercise-bout
#3
G A Ferreira, R Bertuzzi, F R De-Oliveira, F O Pires, A E Lima-Silva
We investigated if carbohydrate (CHO) availability could affect the excess post-exercise oxygen consumption (EPOC) after a single supramaximal exercise bout. Five physically active men cycled at 115% of peak oxygen uptake (V̇O2 peak) until exhaustion with low or high pre-exercise CHO availability. The endogenous CHO stores were manipulated by performing a glycogen-depletion exercise protocol 48 h before the trial, followed by 48 h consuming either a low- (10% CHO) or a high-CHO (80% CHO) diet regime. Compared to the low-CHO diet, the high-CHO diet increased time to exhaustion (3...
October 24, 2016: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/27780822/pre-sleep-protein-ingestion-does-not-compromise-the-muscle-protein-synthetic-response-to-protein-ingested-the-following-morning
#4
Benjamin T Wall, Nicholas A Burd, Rinske Franssen, Stefan Hm Gorissen, Tim Snijders, Joan M Senden, Annemie P Gijsen, Luc J C van Loon
: Protein ingestion before sleep augments post-exercise muscle protein synthesis during overnight recovery. PURPOSE: It is unknown whether post-exercise and pre-sleep protein consumption modulates post-prandial protein handling and myofibrillar protein synthetic responses the following morning. Sixteen healthy young (24±1 y) men performed unilateral resistance-type exercise (contralateral leg acting as a resting control) at 20:00 h. Participants ingested 20 g protein immediately after exercise plus 60 g protein pre-sleep (PRO group; n=8) or equivalent boluses of carbohydrate (CON; n=8)...
October 25, 2016: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27747847/the-acute-effect-of-exercise-modality-and-nutrition-manipulations-on-post-exercise-resting-energy-expenditure-and-respiratory-exchange-ratio-in-women-a-randomized-trial
#5
Hailee L Wingfield, Abbie E Smith-Ryan, Malia N Melvin, Erica J Roelofs, Eric T Trexler, Anthony C Hackney, Mark A Weaver, Eric D Ryan
BACKGROUND: The purpose of this study was to examine the effect of exercise modality and pre-exercise carbohydrate (CHO) or protein (PRO) ingestion on post-exercise resting energy expenditure (REE) and respiratory exchange ratio (RER) in women. METHODS: Twenty recreationally active women (mean ± SD; age 24.6 ± 3.9 years; height 164.4 ± 6.6 cm; weight 62.7 ± 6.6 kg) participated in this randomized, crossover, double-blind study. Each participant completed six exercise sessions, consisting of three exercise modalities: aerobic endurance exercise (AEE), high-intensity interval running (HIIT), and high-intensity resistance training (HIRT); and two acute nutritional interventions: CHO and PRO...
December 2015: Sports Medicine—Open
https://www.readbyqxmd.com/read/27677914/effect-of-glycemic-index-of-a-pre-exercise-meal-on-endurance-exercise-performance-a-systematic-review-and-meta-analysis
#6
Catriona A Burdon, Inge Spronk, Hoi Lun Cheng, Helen T O'Connor
BACKGROUND: Low glycemic index (GI) pre-exercise meals may enhance endurance performance by maintaining euglycemia and altering fuel utilization. However, evidence for performance benefits is equivocal. OBJECTIVE: To evaluate the effect of a low GI (LGI) versus a high GI (HGI) pre-exercise meal on endurance performance using meta-analyses. METHODS: Data sources included MEDLINE, SPORTDiscus, AUSPORT, AusportMed, Web of Science, and Scopus...
September 28, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27633843/global-metabolic-stress-of-isoeffort-continuous-and-high-intensity-interval-aerobic-exercise-a-comparative-1-h-nmr-metabonomic-study
#7
Andreas Zafeiridis, Anastasia Chrysovalantou Chatziioannou, Haralambos Sarivasiliou, Antonios Kyparos, Michalis G Nikolaidis, Ioannis S Vrabas, Alexandros Pechlivanis, Panagiotis Zoumpoulakis, Constantinos Baskakis, Konstantina Dipla, Georgios A Theodoridis
The overall metabolic/energetic stress that occurs during an acute bout of exercise is proposed to be the main driving force for long-term training adaptations. Continuous and high-intensity interval exercise protocols (HIIE) are currently prescribed to acquire the muscular and metabolic benefits of aerobic training. We applied (1)H NMR-based metabonomics to compare the overall metabolic perturbation and activation of individual bioenergetic pathways of three popular aerobic exercises matched for effort/strain...
October 4, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/27556488/comparison-of-watermelon-and-carbohydrate-beverage-on-exercise-induced-alterations-in-systemic-inflammation-immune-dysfunction-and-plasma-antioxidant-capacity
#8
R Andrew Shanely, David C Nieman, Penelope Perkins-Veazie, Dru A Henson, Mary P Meaney, Amy M Knab, Lynn Cialdell-Kam
Consuming carbohydrate- and antioxidant-rich fruits during exercise as a means of supporting and enhancing both performance and health is of interest to endurance athletes. Watermelon (WM) contains carbohydrate, lycopene, l-citrulline, and l-arginine. WM may support exercise performance, augment antioxidant capacity, and act as a countermeasure to exercise-induced inflammation and innate immune changes. Trained cyclists (n = 20, 48 ± 2 years) participated in a randomized, placebo controlled, crossover study...
August 22, 2016: Nutrients
https://www.readbyqxmd.com/read/27453549/acute-endurance-exercise-lowers-serum-fibroblast-growth-factor-21-levels-in-japanese-men
#9
Hirokazu Taniguchi, Kumpei Tanisawa, Xiaomin Sun, Mitsuru Higuchi
OBJECTIVE: The independent effects of acute endurance exercise on FGF21 metabolism are poorly understood. Therefore, the purpose of this study was to determine whether acute endurance exercise modulates serum postprandial FGF21 levels in an age-dependent manner. DESIGN: Exercise intervention trial. PATIENTS: Twenty-eight subjects participated in the experiment, of whom 13 were excluded mainly because of a serum FGF21 level below the limit of detection...
December 2016: Clinical Endocrinology
https://www.readbyqxmd.com/read/27379793/seven-days-of-high-carbohydrate-ingestion-does-not-attenuate-post-exercise-il-6-and-hepcidin-levels
#10
Claire E Badenhorst, Brian Dawson, Gregory R Cox, Marc Sim, Coby M Laarakkers, Dorine W Swinkels, Peter Peeling
PURPOSE: This investigation examined if a high carbohydrate (CHO) diet, maintained across a seven-day training period, could attenuate post-exercise interleukin-6 (IL-6) and serum hepcidin levels. METHODS: Twelve endurance-trained male athletes completed two seven-day running training blocks whilst consuming either a high (8 g kg(-1)) versus a low (3 g kg(-1)) CHO isoenergetic diet. Each training block consisted of five running sessions performed on days 1, 2, 4, 5, and 7, with the intensity and duration of each session matched between training weeks...
September 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27359513/effect-of-aerobic-pre-exercise-carbohydrate-supplementation-on-salivary-cortisol-concentration-258-board-95-june-1-11-00-am-12-30-pm
#11
Matt Kleven, Ben Besch, Paul Mellick
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27347999/slow-absorbing-modified-starch-before-and-during-prolonged-cycling-increases-fat-oxidation-and-gastrointestinal-distress-without-changing-performance
#12
Daniel A Baur, Fernanda de C S Vargas, Christopher W Bach, Jordan A Garvey, Michael J Ormsbee
While prior research reported altered fuel utilization stemming from pre-exercise modified starch ingestion, the practical value of this starch for endurance athletes who consume carbohydrates both before and during exercise is yet to be examined. The purpose of this study was to determine the effects of ingesting a hydrothermally-modified starch supplement (HMS) before and during cycling on performance, metabolism, and gastrointestinal comfort. In a crossover design, 10 male cyclists underwent three nutritional interventions: (1) a commercially available sucrose/glucose supplement (G) 30 min before (60 g carbohydrate) and every 15 min during exercise (60 g∙h(-1)); (2) HMS consumed at the same time points before and during exercise in isocaloric amounts to G (Iso HMS); and (3) HMS 30 min before (60 g carbohydrate) and every 60 min during exercise (30 g·h(-1); Low HMS)...
June 25, 2016: Nutrients
https://www.readbyqxmd.com/read/27287376/basal-insulin-delivery-reduction-for-exercise-in-type-1-diabetes-finding-the-sweet-spot
#13
Hood Thabit, Lalantha Leelarathna
Exercise poses significant challenges to glucose management in type 1 diabetes. In spite of careful planning and manipulation of subcutaneous insulin administration, increased risk of hypoglycaemia and glycaemic variability during and after exercise may occur as a result of inherent delays in insulin action and impaired counter-regulatory hormone responses. Various strategies to mitigate this issue have been advocated in clinical practice, including ingestion of supplementary carbohydrate prior to exercise, reducing background and pre-meal insulin bolus and performing bouts of resistance/high intensity exercise before aerobic exercise...
August 2016: Diabetologia
https://www.readbyqxmd.com/read/27226937/medical-students-attitudes-toward-non-adherent-patients-before-and-after-a-simulated-patient-role-activity-and-small-group-discussion-revisited
#14
Angela DelPrete, Christin Giordano, Analia Castiglioni, Caridad Hernandez
Introduction This study seeks to explore whether the documented decline in medical student empathy can be prevented or slowed using simulated patient-role activities and small-group discussions about the patient experience of living with a chronic illness. Methods First-year students (M1, n = 118) at the University of Central Florida College of Medicine (UCFCOM) participated in a simulated patient-role activity resembling the experience of a patient with Type 2 diabetes mellitus. The activity included taking daily "medication," participating in moderate exercise, and maintaining a low carbohydrate diet...
2016: Curēus
https://www.readbyqxmd.com/read/27225627/fuel-for-the-work-required-a-practical-approach-to-amalgamating-train-low-paradigms-for-endurance-athletes
#15
Samuel G Impey, Kelly M Hammond, Sam O Shepherd, Adam P Sharples, Claire Stewart, Marie Limb, Kenneth Smith, Andrew Philp, Stewart Jeromson, D Lee Hamilton, Graeme L Close, James P Morton
Using an amalgamation of previously studied "train-low" paradigms, we tested the effects of reduced carbohydrate (CHO) but high leucine availability on cell-signaling responses associated with exercise-induced regulation of mitochondrial biogenesis and muscle protein synthesis (MPS). In a repeated-measures crossover design, 11 males completed an exhaustive cycling protocol with high CHO availability before, during, and after exercise (HIGH) or alternatively, low CHO but high protein (leucine enriched) availability (LOW + LEU)...
May 2016: Physiological Reports
https://www.readbyqxmd.com/read/27197855/effects-of-hypervolemia-by-protein-and-glucose-supplementation-during-aerobic-training-on-thermal-and-arterial-pressure-regulations-in-hypertensive-older-men
#16
Yufuko Kataoka, Yoshi-Ichiro Kamijo, Yu Ogawa, Eri Sumiyoshi, Mari Nakae, Shigeki Ikegawa, Kazumasa Manabe, Mayuko Morikawa, Masashi Nagata, Satoshi Takasugi, Shizue Masuki, Hiroshi Nose
The incidence of heat illness in older people has rapidly increased during midsummer for the last decade in Japan, and we suggested that whey-protein + carbohydrate supplementation during aerobic training increased plasma volume (PV) to enhance thermoregulatory adaptation in older men (J Appl Physiol, 107: 725-733, 2009); however, >60% of people age 65 and older suffer from hypertension and the symptoms may be worsened by the hypervolemia. To examine this, we randomly divided 21 older men (~69 years) with ~160 mmHg for systolic and ~90 mmHg for diastolic blood pressure at rest into two groups; Glc (N=11) consuming glucose alone (25g) and Pro-Glc (N=10) consuming whey-protein (10g) + glucose (15g), immediately after cycling exercise at 60-75% of peak aerobic capacity (VO2peak) for 60 min·day(-1), 3 days·week(-1), for 8 weeks...
May 19, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27193231/creatine-ingestion-augments-dietary-carbohydrate-mediated-muscle-glycogen-supercompensation-during-the-initial-24%C3%A2-h-of-recovery-following-prolonged-exhaustive-exercise-in-humans
#17
Paul A Roberts, John Fox, Nicholas Peirce, Simon W Jones, Anna Casey, Paul L Greenhaff
Muscle glycogen availability can limit endurance exercise performance. We previously demonstrated 5 days of creatine (Cr) and carbohydrate (CHO) ingestion augmented post-exercise muscle glycogen storage compared to CHO feeding alone in healthy volunteers. Here, we aimed to characterise the time-course of this Cr-induced response under more stringent and controlled experimental conditions and identify potential mechanisms underpinning this phenomenon. Fourteen healthy, male volunteers cycled to exhaustion at 70 % VO2peak...
August 2016: Amino Acids
https://www.readbyqxmd.com/read/27177231/comparison-of-energy-supplements-during-prolonged-exercise-for-maintenance-of-cardiac-function-carbohydrate-only-versus-carbohydrate-plus-whey-or-casein-hydrolysate
#18
Tanja Oosthuyse, Aletta M E Millen
Cardiac function is often suppressed following prolonged strenuous exercise and this may occur partly because of an energy deficit. This study compared left ventricular (LV) function by 2-dimensional echocardiography and tissue Doppler imaging (TDI) before and after ∼2.5 h of cycling (2-h steady-state 60% peak aerobic power output plus 16 km time trial) in 8 male cyclists when they ingested either placebo, carbohydrate-only (CHO-only), carbohydrate-casein hydrolysate (CHO-casein), or carbohydrate-whey hydrolysate (CHO-whey)...
June 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27168135/insulin-pump-basal-adjustment-for-exercise-in-type-1-diabetes-a-randomised-crossover-study
#19
Sybil A McAuley, Jodie C Horsburgh, Glenn M Ward, André La Gerche, Judith L Gooley, Alicia J Jenkins, Richard J MacIsaac, David N O'Neal
AIMS/HYPOTHESIS: The aim of this study was to investigate the effects of exercise, vs rest, on circulating insulin and glucose, following pre-exercise insulin pump basal rate reduction. METHODS: This was an open-label, two-stage randomised crossover study of 14 adults (seven women, seven men) with type 1 diabetes established on insulin pump therapy. In each stage, participants fasted and insulin delivery was halved following a single insulin basal rate overnight...
August 2016: Diabetologia
https://www.readbyqxmd.com/read/27087798/the-impact-of-post-exercise-hydration-with-deep-ocean-mineral-water-on-rehydration-and-exercise-performance
#20
COMPARATIVE STUDY
Douglas A Keen, Eleni Constantopoulos, John P Konhilas
BACKGROUND: Dehydration caused by prolonged exercise impairs thermoregulation, endurance and exercise performance. Evidence from animal and human studies validates the potential of desalinated deep-ocean mineral water to positively impact physiological and pathophysiological conditions. Here, we hypothesize that deep-ocean mineral water drawn from a depth of 915 m off the Kona, HI coast enhances recovery of hydration and exercise performance following a dehydrating exercise protocol compared to mountain spring water and a carbohydrate-based sports drink...
2016: Journal of the International Society of Sports Nutrition
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