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Protein intake after exercise

Roger Fielding, Linda Riede, James P Lugo, Aouatef Bellamine
Given its pivotal role in fatty acid oxidation and energy metabolism, l-carnitine has been investigated as ergogenic aid for enhancing exercise capacity in the healthy athletic population. Early research indicates its beneficial effects on acute physical performance, such as increased maximum oxygen consumption and higher power output. Later studies point to the positive impact of dietary supplementation with l-carnitine on the recovery process after exercise. It is demonstrated that l-carnitine alleviates muscle injury and reduces markers of cellular damage and free radical formation accompanied by attenuation of muscle soreness...
March 13, 2018: Nutrients
Wolfgang Kemmler, Matthias Kohl, Ellen Freiberger, Cornel Sieber, Simon von Stengel
BACKGROUND: Sarcopenic Obesity (SO) is characterized by low lean and high fat mass; i.e. from a functional aspect a disproportion between engine (muscle) and mass to be moved (fat). At present, most research focuses on the engine, but the close "cross talk" between age-associated adipose and skeletal muscle tissue inflammation calls for comprehensive interventions that affect both components alike. Protein and exercise are likely candidates, however with respect to the latter, the enthusiasm for intense and frequent exercise is rather low, especially in functionally limited older people...
March 9, 2018: BMC Geriatrics
Joanna Zapolska, Katarzyna Witczak-Sawczuk, Maryna Krawczuk-Rybak, Małgorzata Sawicka-Żukowska, Joanna Smarkusz, Lucyna Ostrowska
Background: Properly balanced diet and exercise are an essential element of healthy living for children and adolescents. Particular attention should be paid to nutrition and physical activity among juniors after cancer treatment, which is one of the most important elements of the convalescence period. Objective: The aim of the study was a comparative analysis of diet, physical activity of healthy children and adolescents with patients after cancer treatment. Material and methods: The study involved 60 children and adolescents; 30 healthy juniors and 30 patients after treatment for cancer...
2018: Roczniki Państwowego Zakładu Higieny
Søren Reitelseder, Kasper Dideriksen, Jakob Agergaard, Nikolaj M Malmgaard-Clausen, Rasmus L Bechshoeft, Rasmus K Petersen, Anja Serena, Ulla R Mikkelsen, Lars Holm
PURPOSE: The responsiveness of older individuals' skeletal muscle to anabolic strategies may be impaired. However, direct comparisons within the same experimental setting are sparse. The aim of this study was to assess the resting and post-resistance exercise muscle protein synthesis rates in response to two types of milk protein and carbohydrate using a unilateral exercise leg model. METHODS: Twenty-seven older (69 ± 1 year, mean ± SE) men were randomly assigned one of three groups: Whey hydrolysate (WH), caseinate (CAS), or carbohydrate (CHO)...
February 22, 2018: European Journal of Nutrition
Stephan van Vliet, Joseph W Beals, Isabel G Martinez, Sarah K Skinner, Nicholas A Burd
Dietary protein ingestion is critical to maintaining the quality and quantity of skeletal muscle mass throughout adult life. The performance of acute exercise enhances muscle protein remodeling by stimulating protein synthesis rates for several hours after each bout, which can be optimized by consuming protein during the post-exercise recovery period. To date, the majority of the evidence regarding protein intake to optimize post-exercise muscle protein synthesis rates is limited to isolated protein sources...
February 16, 2018: Nutrients
John-Paul Fuller-Jackson, Iain J Clarke, Alexandra Rao, Belinda A Henry
Caloric restriction causes a homeostatic reduction in thermogenesis. We aimed to determine whether exercise could counteract this. We studied four groups of normal-weight ewes ( n = 5), including control sedentary fed ad libitum, exercise fed ad libitum (30 min/d, 5 d/wk), diet-restricted (70% of ad libitum food intake), and combined diet and exercise. Temperature probes implanted in sternal and retroperitoneal adipose tissue and skeletal muscle measured thermogenesis. After the 4-wk intervention, hypothalami were collected for in situ hybridization, and fat and muscle biopsies were collected for real-time PCR and Western blotting...
February 13, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
Julie Masurier, Marie-Eve Mathieu, S Nicole Fearnbach, Charlotte Cardenoux, Valérie Julian, Céline Lambert, Bruno Pereira, Martine Duclos, Yves Boirie, David Thivel
There is a growing interest regarding the effect of exercise on appetite and energy intake in youth. While the role of exercise intensity has been a primary focus of study, the effect of exercise duration on subsequent food intake has not been fully examined in obese adolescents. On three separate mornings in a randomly assigned order, obese adolescent girls (n=20) aged 12-15 years old were asked to perform a rest session (CON) or two cycling sessions for 20 (EX20) or 40 (EX40) minutes set at their ventilatory threshold...
February 12, 2018: International Journal of Sport Nutrition and Exercise Metabolism
Bill I Campbell, Danielle Aguilar, Laurin Conlin, Andres Vargas, Brad Jon Schoenfeld, Amey Corson, Chris Gai, Shiva Best, Elfego Galvan, Kaylee Couvillion
Aspiring female physique athletes are often encouraged to ingest relatively high levels of dietary protein in conjunction with their resistance-training programs. However, there is little to no research investigating higher vs. lower protein intakes in this population. This study examined the influence of a high vs. low protein diet in conjunction with an 8-week resistance training program in this population. Seventeen females (21.2±2.1 years; 165.1±5.1 cm; 61±6.1 kg) were randomly assigned to a high protein diet (HP: 2...
February 6, 2018: International Journal of Sport Nutrition and Exercise Metabolism
Sally M Abilmona, Ashraf S Gorgey
PURPOSE: Skeletal muscle atrophy and poor dietary habits may contribute to increased adiposity and impaired metabolic health after spinal cord injury (SCI). The relative association of trunk muscle cross-sectional areas (CSA) versus dietary habits to central adiposity and impaired metabolic health after SCI remains unclear. METHODS: Twenty-two men with motor complete SCI completed five-day dietary recalls for 4 weeks. Trunk muscle CSAs as well as visceral and subcutaneous adipose tissue (VAT and SAT, respectively) were quantified using magnetic resonance imaging...
February 6, 2018: Clinical Physiology and Functional Imaging
Jill J Leckey, Nolan J Hoffman, Evelyn B Parr, Brooke L Devlin, Adam J Trewin, Nigel K Stepto, James P Morton, Louise M Burke, John A Hawley
High-fat, low-carbohydrate (CHO) diets increase whole-body rates of fat oxidation and down-regulate CHO metabolism. We measured substrate utilization and skeletal muscle mitochondrial respiration to determine whether these adaptations are driven by high fat or low CHO availability. In a randomized crossover design, 8 male cyclists consumed 5 d of a high-CHO diet [>70% energy intake (EI)], followed by 5 d of either an isoenergetic high-fat (HFAT; >65% EI) or high-protein diet (HPRO; >65% EI) with CHO intake clamped at <20% EI...
January 17, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
E Capristo, S Panunzi, A De Gaetano, M Raffaelli, C Guidone, A Iaconelli, L L'Abbate, A L Birkenfeld, R Bellantone, S R Bornstein, G Mingrone
BACKGROUND/OBJECTIVES: As only 1% of clinically eligible subjects choose to undergo surgical treatment for obesity, other options should be investigated. This study aimed to assess the effects of intensive lifestyle modification (ILM) with or without 3-mg liraglutide daily vs. sleeve gastrectomy (SG) on BMI after 1 year. SUBJECTS/METHODS: In this study performed at an Italian university hospital, non-diabetic patients eligible for bariatric surgery were recruited from a weight-loss clinic and had the option to choose from three possible weight-loss programmes up to an allocation of 25 subjects in each arm matched by BMI and age...
December 29, 2017: Diabetes & Metabolism
Josephine Gade, Anne Marie Beck, Christian Bitz, Britt Christensen, Tobias Wirenfeldt Klausen, Anders Vinther, Arne Astrup
INTRODUCTION: Age-related loss of muscle mass and strength, sarcopaenia, burdens many older adults. The process is accelerated with bed rest, protein intakes below requirements and the catabolic effect of certain illnesses. Thus, acutely ill, hospitalised older adults are particularly vulnerable. Protein supplementation can preserve muscle mass and/or strength and, combining this with resistance exercise training (RT), may have additional benefits. Therefore, this study investigates the effect of protein supplementation as an addition to offering RT among older adults while admitted to the geriatric ward and after discharge...
February 1, 2018: BMJ Open
Jiwoong Jang, Hun-Young Park, Choongsung Yoo, Yeram Park, Jisu Kim, Kiwon Lim
PURPOSE: Resistance exercise training (RET) and an additional intake of dietary protein supplements may improve muscle mass and muscular function, and reduce inflammatory markers. The types, amount, and timing of dietary protein supplements are important for the synergistic effects of resistance training and dietary protein supplements. We hypothesized that a 25.1 g protein complex supplement taken for 12 weeks, immediately before and after resistance exercise, would enhance fat free mass and isokinetic muscular function in young untrained males...
December 31, 2017: Journal of Exercise Nutrition & Biochemistry
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
S Seino, K Sumi, M Narita, Y Yokoyama, K Ashida, A Kitamura, S Shinkai
OBJECTIVES: To investigate whether supplementation with low-dose dairy protein plus micronutrients augments the effects of resistance exercise (RE) on muscle mass and physical performance compared with RE alone among older adults. DESIGN: Randomized controlled trial. SETTING: Tokyo, Japan. PARTICIPANTS: Eighty-two community-dwelling older adults (mean age, 73.5 years) were randomly allocated to an RE plus dairy protein and micronutrient supplementation group or an RE only group (n = 41 each)...
2018: Journal of Nutrition, Health & Aging
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
Mathieu Maltais, Morgane Du Bois-Dit-Bonclaude, Taha Amamou, Eléonor Riesco, Isabelle J Dionne
BACKGROUND: Because of its satiating effect, it has been widely purported that a high-protein beverage may reduce subsequent appetite and food intake in healthy aged individuals, therefore annihilating any supplemental effect. AIMS: The goal of the study was to examine the impact of a post-exercise protein supplement from dairy products in the hours following resistance exercise on subsequent energy intake, sensation of hunger, appetite and satiety in sarcopenic older men...
December 19, 2017: Aging Clinical and Experimental Research
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
Akane Miki, Yoshitaka Hashimoto, Shinobu Matsumoto, Emi Ushigome, Takuya Fukuda, Takafumi Sennmaru, Muhei Tanaka, Masahiro Yamazaki, Michiaki Fukui
Background/Aims: Protein intake is important for maintaining muscle mass in general population. However, it remains to be elucidated the association between dietary protein intake and skeletal muscle mass in elderly patients with type 2 diabetes. Methods: In this cross-sectional study of 168 elderly patients with type 2 diabetes, we investigated the relationship between skeletal muscle index (SMI) and protein intake. Bioimpedance analysis was used for measurement for skeletal muscle mass (kg) and SMI (%), which was defined as skeletal muscle mass (kg)/total body weight (kg) × 100...
2017: Journal of Diabetes Research
Marcus Moberg, Gina Hendo, Madelene Jakobsson, C Mikael Mattsson, Elin Ekblom-Bak, Mikael Flockhart, Marjan Pontén, Karin Söderlund, Björn Ekblom
Little is known about the molecular regulation of skeletal muscle protein turnover during exercise in field conditions where energy is intake inadequate. Here, 17 male and 7 female soldiers performed an 8 days long field-based military operation. Vastus lateralis muscle biopsies, in which autophagy, the ubiquitin-proteasome system, and the mTORC1 signaling pathway were studied, were collected before and after the operation. The 187 h long operation resulted in a 15% and 29% negative energy balance as well as a 4...
December 2017: Physiological Reports
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