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Protein and resistance exercise

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https://www.readbyqxmd.com/read/28645653/catalase-overexpression-modulates-metabolic-parameters-in-a-new-stress-less-leptin-deficient-mouse-model
#1
Deborah L Amos, Tanner Robinson, Melissa B Massie, Carla Cook, Alexis Hoffsted, Courtney Crain, Nalini Santanam
Oxidative stress plays a key role in obesity by modifying the function of important biological molecules, thus altering obesogenic pathways such as glucose and lipid signaling. Catalase, is an important endogenous antioxidant enzyme that catabolizes hydrogen peroxide produced by the dismutation of superoxide. Recent studies have shown knockdown of catalase exacerbates insulin resistance and leads to obesity. We hypothesized that overexpressing catalase in an obese mouse will modulate obesogenic pathways and protect against obesity...
June 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28642676/international-society-of-sports-nutrition-position-stand-protein-and-exercise
#2
REVIEW
Ralf Jäger, Chad M Kerksick, Bill I Campbell, Paul J Cribb, Shawn D Wells, Tim M Skwiat, Martin Purpura, Tim N Ziegenfuss, Arny A Ferrando, Shawn M Arent, Abbie E Smith-Ryan, Jeffrey R Stout, Paul J Arciero, Michael J Ormsbee, Lem W Taylor, Colin D Wilborn, Doug S Kalman, Richard B Kreider, Darryn S Willoughby, Jay R Hoffman, Jamie L Krzykowski, Jose Antonio
The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows:An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein consumption occurs before or after resistance exercise.For building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28638350/branched-chain-amino-acid-ingestion-stimulates-muscle-myofibrillar-protein-synthesis-following-resistance-exercise-in-humans
#3
Sarah R Jackman, Oliver C Witard, Andrew Philp, Gareth A Wallis, Keith Baar, Kevin D Tipton
The ingestion of intact protein or essential amino acids (EAA) stimulates mechanistic target of rapamycin complex-1 (mTORC1) signaling and muscle protein synthesis (MPS) following resistance exercise. The purpose of this study was to investigate the response of myofibrillar-MPS to ingestion of branched-chain amino acids (BCAAs) only (i.e., without concurrent ingestion of other EAA, intact protein, or other macronutrients) following resistance exercise in humans. Ten young (20.1 ± 1.3 years), resistance-trained men completed two trials, ingesting either 5...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28630576/no-effect-of-a-whey-growth-factor-extract-during-resistance-training-on-strength-body-composition-or-hypertrophic-gene-expression-in-resistance-trained-young-men
#4
Michael J Dale, Alison M Coates, Peter R C Howe, Grant R Tomkinson, Matthew T Haren, Andrew Brown, Marissa Caldow, David Cameron-Smith, Jonathan D Buckley
Growth factors can be isolated from bovine milk to form a whey growth factor extract (WGFE). This study examined whether WGFE promoted activation of the AKT/mTOR pathway enabling increased lean tissue mass and strength in resistance trained men. Forty six men with >6 months of resistance training (RT) experience performed 12 weeks of RT. Participants consumed 20 g/day of whey protein and were randomised to receive either 1.6 g WGFE/day (WGFE; n = 22) or 1.6 g cellulose/day (control, CONT; n = 24). The primary outcome was leg press one-repetition maximum (LP1-RM) which was assessed at baseline, 6 and 12 weeks...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28620308/the-effect-of-interdialytic-combined-resistance-and-aerobic-exercise-training-on-health-related-outcomes-in-chronic-hemodialysis-patients-the-tunisian-randomized-controlled-study
#5
Bechir Frih, Hamdi Jaafar, Wajdi Mkacher, Zohra Ben Salah, Mohamed Hammami, Ameur Frih
Background: Tunisia has the highest prevalence of hemodialysis patients compared to the other countries in North Africa. Dialysis centers rarely offer an exercise program to prevent physiological and psychological dialysis therapy-related alterations in chronic hemodialysis patients. Aim: To examine the effect of combined endurance-resistance training program on physiological and psychological outcomes in patients undergoing hemodialysis. Methods: We designed a single blinded, randomized, controlled study for a period of 4 months...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28604135/adding-soy-protein-to-milk-enhances-the-effect-of-resistance-training-on-muscle-strength-in-postmenopausal-women
#6
Fábio L Orsatti, Nailza Maestá, Erick P de Oliveira, Jorge Nahas Neto, Roberto C Burini, Paulo R P Nunes, Aletéia P Souza, Fernanda M Martins, Eliana P Nahas
Resistance training (RT) and high-quality protein ingestion improves muscle mass (MM) and strength (MS). However, no study has evaluated the effect of ingesting milk plus soy protein (SOY) on MM and MS in postmenopausal women (PW). Thus, the aim of this study was to evaluate the effects of adding SOY to milk on MM and MS after 16 weeks of RT. Thirty-two PW were randomized and allocated into two groups: placebo and RT (PL+RT, n = 16) and SOY and RT (SOY+RT, n = 16). The SOY+RT received 25 g of SOY while the PL+RT received 25 g of maltodextrin (placebo)...
June 12, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28603468/minimal-dose-of-milk-protein-concentrate-to-enhance-the-anabolic-signalling-response-to-a-single-bout-of-resistance-exercise-a-randomised-controlled-trial
#7
Cameron J Mitchell, Nina Zeng, Randall F D'Souza, Sarah M Mitchell, Kirsten Aasen, Aaron C Fanning, Sally D Poppitt, David Cameron-Smith
BACKGROUND: Resistance training is a potent stimulus to induce muscle hypertrophy. Supplemental protein intake is known to enhance gains in muscle mass through activation of the mammalian target of rapamycin complex 1 (mTORC1) pathway, which initiates protein translation. While the optimal dose of high quality protein to promote post exercise anabolism in young or older men has been investigated, little is known about the minimum doses of protein required to potentiate the resistance exercise activation of anabolic signalling in middle aged men...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28597407/resistance-wheel-exercise-from-mid-life-has-minimal-effect-on-sciatic-nerves-from-old-mice-in-which-sarcopenia-was-prevented
#8
Vidya S Krishnan, Zoe White, Jessica R Terrill, Stuart I Hodgetts, Melinda Fitzgerald, Tea Shavlakadze, Alan R Harvey, Miranda D Grounds
The ability of resistance exercise, initiated from mid-life, to prevent age-related changes in old sciatic nerves, was investigated in male and female C57BL/6J mice. Aging is associated with cellular changes in old sciatic nerves and also loss of skeletal muscle mass and function (sarcopenia). Mature adult mice aged 15 months (M) were subjected to increasing voluntary resistance wheel exercise (RWE) over a period of 8 M until 23 M of age. This prevented sarcopenia in the old 23 M aged male and female mice...
June 8, 2017: Biogerontology
https://www.readbyqxmd.com/read/28595022/qualitative-analysis-of-drivers-and-barriers-to-adhering-to-an-exercise-protein-intervention-designed-to-counteract-sarcopenia
#9
Annemarthe L Herrema, Marjan J Westerman, Ellen J I van Dongen, Urszula Kudla, Martijn Veltkamp
Interventions combining protein-rich diets with resistance exercises seem a promising avenue in helping to prevent sarcopenia. However, compliance to health interventions is generally low. The aim of the present study was to provide qualitative insights into the drivers and barriers that older adults experience when trying to comply with a combined dietary and physical exercise intervention. Semi-structured interviews with eighteen older adults participating in such an intervention were conducted and analysed using thematic content analysis...
May 22, 2017: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/28593786/characterization-of-liver-changes-in-zsf1-rats-an-animal-model-of-metabolic-syndrome
#10
Marta Borges Canha, José Pedro Portela-Cidade, Glória Conceição, Cláudia Sousa-Mendes, Sara Leite, Dulce Fontoura, Daniel Moreira-Gonçalves, Inês Falcão-Pires, André Lourenço, Adelino Leite-Moreira, Pedro Pimentel-Nunes
BACKGROUND: The non-alcoholic fatty liver disease is the hepatic counterpart of the metabolic syndrome. ZSF1 rats are a metabolic syndrome animal model in which liver changes have not been described yet. AIM: The characterization of liver histological and innate immunity changes in ZSF1 rats. METHODS: Five groups of rats were included (n = 7 each group): healthy Wistar-Kyoto control rats (Ctrl), hypertensive ZSF1 lean (Ln), ZSF1 obese rats with a normal diet (Ob), ZSF1 obese rates with a high-fat diet (Ob-HFD), and ZSF1 obese rats with low-intensity exercise training (Ob-Ex)...
June 8, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28586517/extracellular-vesicles-in-the-tumor-microenvironment-therapeutic-resistance-clinical-biomarkers-and-targeting-strategies
#11
REVIEW
L Han, J Xu, Q Xu, B Zhang, E W-F Lam, Y Sun
Numerous studies have proved that cell-nonautonomous regulation of neoplastic cells is a distinctive and essential characteristic of tumorigenesis. Two way communications between the tumor and the stroma, or within the tumor significantly influence disease progression and modify treatment responses. In the tumor microenvironment (TME), malignant cells utilize paracrine signaling initiated by adjacent stromal cells to acquire resistance against multiple types of anticancer therapies, wherein extracellular vesicles (EVs) substantially promote such events...
June 6, 2017: Medicinal Research Reviews
https://www.readbyqxmd.com/read/28578654/progressive-resistance-training-in-head-and-neck-cancer-patients-during-concomitant-chemoradiotherapy-design-of-the-dahanca-31-randomized-trial
#12
Camilla K Lonkvist, Simon Lønbro, Anders Vinther, Bo Zerahn, Eva Rosenbom, Hanne Primdahl, Pernille Hojman, Julie Gehl
BACKGROUND: Head and neck cancer patients undergoing concomitant chemoradiotherapy (CCRT) frequently experience loss of muscle mass and reduced functional performance. Positive effects of exercise training are reported for many cancer types but biological mechanisms need further elucidation. This randomized study investigates whether progressive resistance training (PRT) may attenuate loss of muscle mass and functional performance. Furthermore, biochemical markers and muscle biopsies will be investigated trying to link biological mechanisms to training effects...
June 3, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28578257/melatonin-supplementation-plus-exercise-behavior-ameliorate-insulin-resistance-hypertension-and-fatigue-in-a-rat-model-of-type-2-diabetes-mellitus
#13
Md Mahbubur Rahman, Han-Sol Kwon, Myung-Jin Kim, Hyeon-Kyu Go, Min-Ho Oak, Do-Hyung Kim
INTRODUCTION: The objective was to investigate the effects of melatonin and exercise on insulin resistance (IR), hypertension and fatigue syndrome in a rat model of type 2 diabetes mellitus (T2DM). MATERIALS AND METHODS: Rats were divided into 5 groups namely normal control (NC), T2DM control group (DC), diabetes plus exercise (DE), diabetes plus oral melatonin supplement (DM) and diabetes plus melatonin and exercise (DME) groups. Melatonin was administered orally 5mg/kg twice daily and 40min swimming/day 5days/week were regimented after diabetes induction...
June 1, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28572498/edward-f-adolph-distinguished-lecture-exercise-teaching-myocytes-new-tricks
#14
Scott K Powers
Endurance exercise training promotes numerous cellular adaptations in both cardiac myocytes and skeletal muscle fibers. For example, exercise training fosters changes in mitochondrial dynamics including increased mitochondrial biogenesis and accelerated mitochondrial turnover. Additionally, endurance exercise training alters the abundance of numerous cytosolic and mitochondrial proteins in both cardiac and skeletal muscle myocytes, resulting in a protective phenotype in the active fibers; this exercise-induced protection of cardiac and skeletal muscle fibers is often referred to as "exercise preconditioning...
June 1, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28571979/impact-of-high-fat-diet-on-the-intestinal-microbiota-and-small-intestinal-physiology-before-and-after-the-onset-of-obesity
#15
REVIEW
João Ricardo Araújo, Julie Tomas, Christiane Brenner, Philippe J Sansonetti
The modulation of the intestinal microbiota by high-fat diet (HFD) has a major impact on both immunological and metabolic functions of the host. Taking this into consideration, the aim of this contribution is to review the impact of HFD on microbiota profile and small intestinal physiology before and after the onset of obesity and its metabolic complications. Evidence from animal studies suggest that before the onset of obesity and its metabolic complications, HFD induces intestinal dysbiosis - encompassing changes in composition balance and massive redistribution with bacteria occupying intervillous spaces and crypts - associated with early physiopathological changes, predominantly in the ileum, such as low-grade inflammation, decreased antimicrobial peptides expression, impaired mucus production, secretion and layer's thickness, and decreased expression of tight junction proteins...
May 29, 2017: Biochimie
https://www.readbyqxmd.com/read/28566814/endocrine-responses-and-acute-mtor-pathway-phosphorylation-to-resistance-exercise-with-leucine-and-whey
#16
M T Lane, T J Herda, A C Fry, M A Cooper, M J Andre, P M Gallagher
Leucine ingestion reportedly activates the mTOR pathway in skeletal muscle, contributing to a hypertrophy response. The purpose of the study was to compare the post-resistance exercise effects of leucine and whey protein supplementation on endocrine responses and muscle mTOR pathway phosphorylation. On visit 1, subjects (X±SD; n=20; age=27.8±2.8yrs) provided baseline blood samples for analysis of cortisol, glucose and insulin; a muscle biopsy of the vastus lateralis muscle to assess mTOR signaling pathway phosphorylation; and were tested for maximum strength on the leg press and leg extension exercises...
June 2017: Biology of Sport
https://www.readbyqxmd.com/read/28555251/post-resistance-exercise-ingestion-of-milk-protein-attenuates-plasma-tnf%C3%AE-and-tnfr1-expression-on-monocyte-subpopulations
#17
Adam J Wells, Adam R Jajtner, Alyssa N Varanoske, David D Church, Adam M Gonzalez, Jeremy R Townsend, Carleigh H Boone, Kayla M Baker, Kyle S Beyer, Gerald T Mangine, Leonardo P Oliveira, David H Fukuda, Jeffrey R Stout, Jay R Hoffman
Attenuating TNFα/TNFr1 signaling in monocytes has been proposed as a means of mitigating inflammation. The purpose of this study was to examine the effects of a milk protein supplement on TNFα and monocyte TNFr1 expression. Ten resistance-trained men (24.7 ± 3.4 years; 90.1 ± 11.3 kg; 176.0 ± 4.9 cm) ingested supplement (SUPP) or placebo (PL) immediately post-exercise in a randomized, cross-over design. Blood samples were obtained at baseline (BL), immediately (IP), 30-min (30P), 1-h (1H), 2-h (2H), and 5-h (5H) post-exercise to assess plasma concentrations of myoglobin; tumor necrosis factor-alpha (TNFα); and expression of tumor necrosis factor receptor 1 (TNFr1) on classical, intermediate, and non-classical monocytes...
May 29, 2017: Amino Acids
https://www.readbyqxmd.com/read/28554316/beta-hydroxy-beta-methyl-butyrate-hmb-from-experimental-data-to-clinical-evidence-in-sarcopenia
#18
Alfonso J Cruz-Jentoft
β-hydroxy-β-methylbutyrate (HMB) is a metabolite derived from leucine and its ketoacid alpha-ketoisocaproate. Leucine has a role in regulating protein synthesis in muscle cells, and HMB seems to be a key active metabolite in such regulation. HMB has been shown to modulate muscle protein degradation by inhibiting the ubiquitin-proteasome proteolytic pathway, to up-regulate protein synthesis via the mTOR pathway, and to stabilize cell membranes via the rate limiting enzyme to cholesterol synthesis HMG- coenzyme A reductase...
May 28, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28550173/experimental-cardiac-radiation-exposure-induces-ventricular-diastolic-dysfunction-with-preserved-ejection-fraction
#19
Hirofumi Saiki, Gilles Moulay, Adam J Guenzel, Weibin Liu, Teresa Decklever, Kelly Classic, Linh Pham, Horng H Chen, John C Burnett, Stephen J Russell, Margaret M Redfield
BACKGROUND: Breast cancer radiotherapy increases the risk of heart failure (HF) with preserved ejection fraction (HFpEF). Cardiomyocytes are highly radio-resistant but radiation specifically affects coronary microvascular endothelial cells with subsequent microvascular inflammation and rarefaction. The effects of radiation on left ventricular (LV) diastolic function are poorly characterized. We hypothesized that cardiac radiation exposure may result in diastolic dysfunction without reduced EF...
May 26, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28549098/high-protein-foods-and-physical-activity-protect-against-age-related-muscle-loss-and-functional-decline
#20
M Loring Bradlee, Jabed Mustafa, Martha R Singer, Lynn L Moore
Background: Some clinical trials suggest that protein supplementation enhances the effects of resistance exercise on skeletal muscle mass (SMM); fewer studies examine the effects of diets rich in protein-source foods on SMM and functional status among community-dwelling adults. Methods: Data from the Framingham Offspring study including diet (three-day records, exams 3 and 5), physical activity (exams 2 and 4), percent SMM (%SMM) (exams 6 and 7), and functional performance (exams 5 through 8) were used to evaluate independent and combined effects of physical activity and high-protein foods on adjusted mean %SMM (using analysis of covariance) and risk of functional decline (using Cox proportional hazard's models)...
May 25, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
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