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Muscle Protein Synthesis Responses Following Aerobic-Based Exercise or High-Intensity Interval Training with or Without Protein Ingestion: A Systematic Review. Sports Med 2022; 52:2713-2732. [PMID: 35675022 PMCID: PMC9585015 DOI: 10.1007/s40279-022-01707-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Systematic investigation of muscle protein synthesis (MPS) responses with or without protein ingestion has been largely limited to resistance training. OBJECTIVE This systematic review determined the capacity for aerobic-based exercise or high-intensity interval training (HIIT) to stimulate post-exercise rates of MPS and whether protein ingestion further significantly increases MPS compared with placebo. METHODS Three separate models analysed rates of either mixed, myofibrillar, sarcoplasmic, or mitochondrial protein synthesis (PS) following aerobic-based exercise or HIIT: Model 1 (n = 9 studies), no protein ingestion; Model 2 (n = 7 studies), peri-exercise protein ingestion with no placebo comparison; Model 3 (n = 14 studies), peri-exercise protein ingestion with placebo comparison. RESULTS Eight of nine studies and all seven studies in Models 1 and 2, respectively, demonstrated significant post-exercise increases in either mixed or a specific muscle protein pool. Model 3 observed significantly greater MPS responses with protein compared with placebo in either mixed or a specific muscle fraction in 7 of 14 studies. Seven studies showed no difference in MPS between protein and placebo, while three studies reported no significant increases in mitochondrial PS with protein compared with placebo. CONCLUSION Most studies reporting significant increases in MPS were confined to mixed and myofibrillar PS that may facilitate power generating capacity of working skeletal muscle with aerobic-based exercise and HIIT. Only three of eight studies demonstrated significant increases in mitochondrial PS post-exercise, with no further benefits of protein ingestion. This lack of change may be explained by the acute analysis window in most studies and apparent latency in exercise-induced stimulation of mitochondrial PS.
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Lawler TP, Cialdella-Kam L. Non-carbohydrate Dietary Factors and Their Influence on Post-Exercise Glycogen Storage: a Review. Curr Nutr Rep 2020; 9:394-404. [PMID: 33128726 DOI: 10.1007/s13668-020-00335-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The optimization of post-exercise glycogen synthesis can improve endurance performance, delay fatigue in subsequent bouts, and accelerate recovery from exercise. High carbohydrate intakes (1.2 g/kg of body weight/h) are recommended in the first 4 h after exercise. However, athletes may struggle to consume carbohydrates at those levels. PURPOSE OF REVIEW: Thus, we aimed to determine whether the consumption of non-carbohydrate dietary factors (creatine, glutamine, caffeine, flavonoids, and alcohol) enhances post-exercise glycogen synthesis. RECENT FINDINGS: Trained athletes may not realize the benefits of creatine loading on glycogen synthesis. The impacts of caffeine, glutamine, flavonoids, and alcohol on post-exercise glycogen synthesis are poorly understood. Other ergogenic benefits to exercise performance, however, have been reported for creatine, glutamine, caffeine, and flavonoids, which were beyond the scope of this review. Evidence in trained athletes is limited and inconclusive on the impact of these non-carbohydrate dietary factors on post-exercise glycogen synthesis.
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Affiliation(s)
- Thomas P Lawler
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, OH, USA.,Department of Nutritional Sciences, University of Wisconsin, Madison, Madison, WI, USA
| | - Lynn Cialdella-Kam
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, OH, USA. .,Warfigther Performance Department, Naval Health Research Center, 140 Sylvester Road, San Diego, CA, 92106, USA.
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Patel B, Pauk M, Amigo-Benavent M, Nongonierma AB, Fitzgerald RJ, Jakeman PM, Carson BP. A cell-based evaluation of a non-essential amino acid formulation as a non-bioactive control for activation and stimulation of muscle protein synthesis using ex vivo human serum. PLoS One 2019; 14:e0220757. [PMID: 31743341 PMCID: PMC6863517 DOI: 10.1371/journal.pone.0220757] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 10/24/2019] [Indexed: 12/30/2022] Open
Abstract
PURPOSE The purpose of this study was to compare the effect of treating skeletal muscle cells with media conditioned by postprandial ex vivo human serum fed with either isonitrogenous Non-Essential Amino Acid (NEAA) or a whey protein hydrolysate (WPH) on stimulating Muscle Protein Synthesis (MPS) in C2C12 skeletal muscle cells. METHODS Blood was taken from six young healthy males following overnight fast (fasted) and 60 min postprandial (fed) ingestion of either WPH or NEAA (0.33 g.kg-1 Body Mass). C2C12 myotubes were treated with media conditioned by ex vivo human serum (20%) for 4 h. Activation of MPS signalling (phosphorylation of mTOR, P70S6K and 4E-BP1) were determined in vitro by Western Blot and subsequent MPS were determined in vitro by Western Blot and surface sensing of translation technique (SUnSET) techniques, respectively. RESULTS Media conditioned by NEAA fed serum had no effect on protein signalling or MPS compared to fasted, whereas media conditioned by WPH fed serum significantly increased mTOR (Ser2448), P70S6K and 4E-BP1 phosphorylation (p<0.01, p<0.05) compared to fasted serum. Furthermore, the effect of media conditioned by WPH fed serum on protein signalling and MPS was significantly increased (p<0.01, p<0.05) compared to NEAA fed serum. CONCLUSION In summary, media conditioned by NEAA fed serum did not result in activation of MPS. Therefore, these in vitro findings suggest the use of isonitrogenous NEAA acts as an effective control for comparing bioactivity of different proteins on activation of MPS.
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Affiliation(s)
- Bijal Patel
- Food for Health Ireland, University of Limerick, Limerick, Ireland
- Human Sciences Research Unit, University of Limerick, Limerick, Ireland
- Department of Physical Education & Sport Sciences, Faculty of Education and Health Sciences, University of Limerick, Limerick, Ireland
| | - Martina Pauk
- Food for Health Ireland, University of Limerick, Limerick, Ireland
- Human Sciences Research Unit, University of Limerick, Limerick, Ireland
- Department of Physical Education & Sport Sciences, Faculty of Education and Health Sciences, University of Limerick, Limerick, Ireland
| | - Miryam Amigo-Benavent
- Food for Health Ireland, University of Limerick, Limerick, Ireland
- Human Sciences Research Unit, University of Limerick, Limerick, Ireland
- Department of Physical Education & Sport Sciences, Faculty of Education and Health Sciences, University of Limerick, Limerick, Ireland
- Centre for Intervention in Infection, Inflammation and Immunity (4i), University of Limerick, Limerick, Ireland
| | - Alice B. Nongonierma
- Food for Health Ireland, University of Limerick, Limerick, Ireland
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Richard J. Fitzgerald
- Food for Health Ireland, University of Limerick, Limerick, Ireland
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Philip M. Jakeman
- Food for Health Ireland, University of Limerick, Limerick, Ireland
- Human Sciences Research Unit, University of Limerick, Limerick, Ireland
- Department of Physical Education & Sport Sciences, Faculty of Education and Health Sciences, University of Limerick, Limerick, Ireland
- Centre for Intervention in Infection, Inflammation and Immunity (4i), University of Limerick, Limerick, Ireland
| | - Brian P. Carson
- Food for Health Ireland, University of Limerick, Limerick, Ireland
- Human Sciences Research Unit, University of Limerick, Limerick, Ireland
- Department of Physical Education & Sport Sciences, Faculty of Education and Health Sciences, University of Limerick, Limerick, Ireland
- Centre for Intervention in Infection, Inflammation and Immunity (4i), University of Limerick, Limerick, Ireland
- Health Research Institute, University of Limerick, Limerick, Ireland
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4
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Teixeira FJ, Matias CN, Monteiro CP, Valamatos MJ, Reis JF, Tavares F, Batista A, Domingos C, Alves F, Sardinha LB, Phillips SM. Leucine Metabolites Do Not Enhance Training-induced Performance or Muscle Thickness. Med Sci Sports Exerc 2019; 51:56-64. [PMID: 30102677 DOI: 10.1249/mss.0000000000001754] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Leucine metabolites, α-hydroxyisocaproic acid (α-HICA) and β-hydroxy-β-methylbutyrate (calcium, HMB-Ca and free acid, HMB-FA), have been proposed to augment resistance training-induced changes in body composition and performance. PURPOSE We aimed to conduct a double-blind randomized controlled pragmatic trial to evaluate the effects of off-the-shelf leucine metabolite supplements of α-HICA, HMB-FA, and HMB-Ca on resistance training-induced changes in muscle thickness and performance. METHODS Forty men were randomly assigned to receive α-HICA (n = 10, fat-free mass [FFM] = 62.0 ± 7.1 kg), HMB-FA (n = 11, FFM = 62.7 ± 10.5 kg), HMB-Ca (n = 9, FFM = 65.6 ± 10.1 kg), or placebo (PLA; n = 10, FFM = 64.2 ± 5.7 kg). The training program consisted of whole body thrice weekly resistance training for 8 wk (seven exercises per session, three to four sets per session, at 70%-80% one repetition maximum). Skeletal muscle thickness by ultrasound, performance measures, and blood measures (creatine kinase, insulin-like growth factor 1, growth hormone, cortisol, and total testosterone) were evaluated at baseline and at the end of weeks 4 and 8. RESULTS Time-dependent changes were observed for muscle thickness (P < 0.001), one repetition maximum bench press and squat (P < 0.001), Wingate peak power (P = 0.02), countermovement jump height (P = 0.03), power (P = 0.006), creatine kinase, insulin-like growth factor-1, growth hormone, and cortisol (all P < 0.001). No significant between-group or time-group interactions were observed. CONCLUSIONS No leucine metabolite resulted in any ergogenic effects on any outcome variable. Supplementation with leucine metabolites-α-HICA, HMB-FA, or HMB-Ca-is not a supplementation strategy that improves muscle growth and strength development in young adult men.
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Affiliation(s)
- Filipe J Teixeira
- Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Catarina N Matias
- Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Laboratory of Exercise and Health, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Center for the Study of Human Performance, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Cristina P Monteiro
- Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Center for the Study of Human Performance, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Maria J Valamatos
- Center for the Study of Human Performance, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Neuromuscular Research Lab, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Joana F Reis
- Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Center for the Study of Human Performance, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Faculty of Health and Sports, Universidade Europeia, Laureate International Universities, Lisboa, PORTUGAL
| | - Francisco Tavares
- Faculty of Health, Sport and Human Performance, The University of Waikato, Hamilton, NEW ZEALAND
| | - Ana Batista
- Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Christophe Domingos
- Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Francisco Alves
- Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Center for the Study of Human Performance, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Luís B Sardinha
- Laboratory of Exercise and Health, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL.,Center for the Study of Human Performance, Faculty of Human Kinetics, Universidade de Lisboa, Cruz Quebrada, PORTUGAL
| | - Stuart M Phillips
- Department of Kinesiology, McMaster University, Hamilton, ON, CANADA
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Teixeira FJ, Matias CN, Monteiro CP, Valamatos MJ, Reis JF, Batista A, Oliveira AC, Alves F, Sardinha LB, Phillips SM. No effect of HMB or α-HICA supplementation on training-induced changes in body composition. Eur J Sport Sci 2018; 19:802-810. [PMID: 30588860 DOI: 10.1080/17461391.2018.1552723] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
β-hydroxy-β-methylbutyrate (calcium: HMB-Ca and free acid: HMB-FA) and α-hydroxyisocaproic acid (α-HICA) are leucine metabolites that have been proposed to improve body composition and strength when combined with resistance exercise training (RET). In this double-blind randomized controlled pragmatic trial, we evaluated the effects of off-the-shelf supplements: α-HICA, HMB-FA and HMB-Ca, on RET-induced changes in body composition and performance. Forty men were blocked randomized to receive α-HICA (n = 10, fat-free mass [FFM] = 62.0 ± 7.1 kg), HMB-FA (n = 11, FFM = 62.7 ± 10.5 kg), HMB-Ca (n = 9, FFM = 65.6 ± 10.1 kg) or placebo (PLA; n = 10, FFM = 64.2 ± 5.7 kg). The training protocol consisted of a whole-body resistance training routine, thrice weekly for 8 weeks. Body composition was assessed by dual-energy x-ray absorptiometry (DXA) and total body water (TBW) by whole-body bioimpedance spectroscopy (BIS), both at baseline and at the end of weeks 4 and 8. Time-dependent changes were observed for increase in trunk FFM (p < 0.05). No statistically significant between-group or group-by-time interactions were observed. Supplementation with HMB (FA and Ca) or α-HICA failed to enhance body composition to a greater extent than placebo. We do not recommend these leucine metabolites for improving body composition changes with RET in young adult resistance trained men.
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Affiliation(s)
- Filipe J Teixeira
- a Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal
| | - Catarina N Matias
- a Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,b Laboratory of Exercise and Health, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,d Interdisciplinary Center for the Study of Human Performance, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal
| | - Cristina P Monteiro
- a Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,d Interdisciplinary Center for the Study of Human Performance, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal
| | - Maria J Valamatos
- c Neuromuscular Research Lab, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,d Interdisciplinary Center for the Study of Human Performance, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal
| | - Joana F Reis
- a Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,d Interdisciplinary Center for the Study of Human Performance, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,e Universidade Europeia , Lisboa , Portugal
| | - Ana Batista
- a Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal
| | - Ana C Oliveira
- f Nutrition Department , Instituto Superior de Ciências da Saúde Egas Moniz , Almada , Portugal
| | - Francisco Alves
- a Laboratory of Physiology and Biochemistry of Exercise, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,d Interdisciplinary Center for the Study of Human Performance, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal
| | - Luís B Sardinha
- b Laboratory of Exercise and Health, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal.,d Interdisciplinary Center for the Study of Human Performance, Faculty of Human Kinetics , Universidade de Lisboa , Cruz Quebrada , Portugal
| | - Stuart M Phillips
- g Department of Kinesiology , McMaster University , Hamilton , Canada
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Nutritionally non-essential amino acids are dispensable for whole-body protein synthesis after exercise in endurance athletes with an adequate essential amino acid intake. Amino Acids 2018; 50:1679-1684. [PMID: 30145710 DOI: 10.1007/s00726-018-2639-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 08/22/2018] [Indexed: 10/28/2022]
Abstract
The increased protein requirement of endurance athletes may be related to the need to replace exercise-induced oxidative losses, especially of the branched-chain amino acids (BCAA). However, it is unknown if non-essential amino acids (NEAA) influence the requirement for essential amino acids (EAA) during post-exercise recovery. Seven endurance-trained males ran 20 km prior to consuming [13C]phenylalanine, sufficient energy, and: (1) deficient protein (BASE); (2) BASE supplemented with sufficient BCAA (BCAAsup); (3) an equivalent EAA intake as BCAA (LowEAA), and; (4) sufficient EAA intake (HighEAA). [13C]Phenylalanine oxidation (the reciprocal of protein synthesis) for BCAAsup and HighEAA (0.54 ± 0.15, 0.49 ± 0.11 µmol kg-1 h-1; Mean ± SD) were significantly lower than BASE (0.74 ± 0.14 µmol kg-1 h-1; P < 0.01 for both) and LowEAA (0.70 ± 0.11 µmol kg-1 h-1; P < 0.05 and 0.01, respectively). Our results suggest that exogenous NEAA are dispensable for whole-body protein synthesis during recovery from endurance exercise provided sufficient EAA are consumed. Endurance athletes who may be at risk of not meeting their elevated protein requirements should prioritize the intake of EAA-enriched foods and/or supplements.
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Goron A, Moinard C. Amino acids and sport: a true love story? Amino Acids 2018; 50:969-980. [PMID: 29855718 DOI: 10.1007/s00726-018-2591-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 05/17/2018] [Indexed: 12/28/2022]
Abstract
Among a plethora of dietary supplements, amino acids are very popular with athletes for several reasons (e.g., to prevent nutritional deficiency, improve muscle function, and decrease muscle damages) whose purpose is to improve performance. However, it is difficult to get a clear idea of which amino acids have real ergogenic impact. Here, we review and analyze the clinical studies evaluating specific amino acids (glutamine, arginine, leucine, etc.) in athletes. Only english-language clinical studies evaluating a specific effect of one amino acid were considered. Despite promising results, many studies have methodological limits or specific flaws that do not allow definitive conclusions. To date, only chronic β-alanine supplementation demonstrated an ergogenic effect in athletes. Much research is still needed to gain evidence-based data before any other specific amino acid can be recommended for use in athletes.
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Affiliation(s)
- Arthur Goron
- Laboratory of Fundamental and Applied Bioenergetics (LBFA), INSERM U 1055 and SFR Environmental and Systems Biology (BEeSy), University Grenoble Alpes, Grenoble, France.
| | - Christophe Moinard
- Laboratory of Fundamental and Applied Bioenergetics (LBFA), INSERM U 1055 and SFR Environmental and Systems Biology (BEeSy), University Grenoble Alpes, Grenoble, France
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Kato H, Suzuki K, Bannai M, Moore DR. Branched-Chain Amino Acids Are the Primary Limiting Amino Acids in the Diets of Endurance-Trained Men after a Bout of Prolonged Exercise. J Nutr 2018; 148:925-931. [PMID: 29746639 DOI: 10.1093/jn/nxy048] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 02/20/2018] [Indexed: 11/13/2022] Open
Abstract
Background The indicator amino acid oxidation (IAAO) method estimates the protein intake required to maximize whole-body protein synthesis and identify the daily protein requirement in a variety of populations. However, it is unclear whether the greater requirements for endurance athletes previously determined by the IAAO reflect an increased demand for all or only some amino acids. Objective The aim of this study was to determine the primary rate-limiting amino acids in endurance-trained athletes after prolonged exercise, by measuring the oxidation of ingested [1-13C]phenylalanine in response to variable amino acid intake. Methods Five endurance-trained men (means ± SDs: age, 26 ± 7 y; body weight, 66.9 ± 9.5 kg; maximal oxygen consumption, 63.3 ± 4.3 mL · kg-1 · min-1) performed 5 trials that involved 2 d of controlled diet (1.4 g protein · kg-1 · d-1) and running (10 km on day 1 and 5 km on day 2) prior to performing an acute bout of endurance exercise (20-km treadmill run) on day 3. During recovery on day 3, participants consumed test diets as 8 isocaloric hourly meals providing sufficient energy and carbohydrate but a variable amino acid intake. The test diets, consumed in random order, were deficient (BASE: 0.8 g · kg-1 · d-1) and sufficient (SUF; 1.75 g · kg-1 · d-1) amino acid diets modeled after egg protein, and BASE supplemented with branched-chain amino acids (BCAA diet; 1.03 g · kg-1 · d-1), essential amino acids (EAA diet; 1.23 g · kg-1 · d-1), or nonessential amino acids (NEAA diet; 1.75 g · kg-1 · d-1). Whole-body phenylalanine flux (Q), 13CO2 excretion (F13CO2), and phenylalanine oxidation (OX) were determined according to standard IAAO methodology. Results There was no effect of amino acid intake on Q (P = 0.43). F13CO2 was significantly (all P < 0.01) lower than BASE for the BCAA (∼32%), EAA (∼31%), and SUF (∼36%) diet treatments. F13CO2 for the NEAA diet was ∼18% lower than for BASE (P < 0.05) but ∼28% greater than for SUF (P < 0.05). OX was similarly decreased (∼24-41%) in all conditions compared with BASE (all P < 0.05). Conclusion Our results suggest that the BCAAs may be the primary rate-liming amino acids in the greater daily protein requirement of endurance trained men. This trial was registered at clinicaltrials.gov as NCT02628249.
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Affiliation(s)
- Hiroyuki Kato
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki, Kanagawa, Japan.,Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada
| | - Katsuya Suzuki
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki, Kanagawa, Japan
| | - Makoto Bannai
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki, Kanagawa, Japan
| | - Daniel R Moore
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada
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The effect of glutamine supplementation on athletic performance, body composition, and immune function: A systematic review and a meta-analysis of clinical trials. Clin Nutr 2018; 38:1076-1091. [PMID: 29784526 DOI: 10.1016/j.clnu.2018.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 03/29/2018] [Accepted: 05/02/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND & AIM This systematic review and meta-analysis of available evidence was conducted to obtain a conclusive result on the effects of glutamine supplementation on athletes. METHODS Systematic review and meta-analysis. Data related to body mass, lean body mass, body fat percentage, Vo2 max, lymphocytes, leukocytes and neutrophil counts were extracted to determine the effects of GLN on performance outcomes. DATA SOURCES The literature search was conducted across the databases Pubmed, Scopus, ISI Web of Science, SID (Scientific Information Database) and Cochrane Central Register of Controlled Trials, covering a period up to January 2017. ELIGIBILITY CRITERIA FOR SELECTING STUDIES Clinical trials evaluating glutamine supplementation outcomes on athletes aged over 18 were included. RESULTS A total of 47 studies were included in the systematic review, and 25 trials matched the inclusion criteria for the meta-analysis. According to the meta-analysis, glutamine has a significant effect on weight reduction (WMD = -1.36 [95% CI: -2.55 to -0.16], p = 0.02). Moreover, neutrophil numbers were reduced following glutamine intake at doses greater than 200 mg/kg body weight (WMD = -605.77 [95% CI: -1200.0 to 52.1]; P = 0.03). Also, supplementation by glutamine dipeptide resulted in higher blood glucose after exercise (WMD = 0.51 [95% CI: 0.18, 0.83] mmol/l; P = 0.002). There was no association between glutamine ingestion and other outcomes investigated. CONCLUSION According to this meta-analysis, generally, glutamine supplementation has no effect on athletics immune system, aerobic performance, and body composition. However, the current study showed that glutamine resulted in greater weight reduction. In addition, the present study suggests that the efficacy of glutamine supplementation on neutrophil numbers could be affected by supplement type and dose.
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10
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Camerino SRAES, Lima RCP, França TCL, Herculano EDA, Rodrigues DSA, Gouveia MGDS, Cameron LC, Prado ES. Keto analogue and amino acid supplementation and its effects on ammonemia and performance under thermoneutral conditions. Food Funct 2016; 7:872-80. [DOI: 10.1039/c5fo01054c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Keto analogue and amino acid supplementation decreases ammonemia during exercise without affecting performance.
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Affiliation(s)
| | | | | | | | | | | | - L. C. Cameron
- Laboratory of Protein Biochemistry
- Federal University of State of Rio de Janeiro
- Rio de Janeiro
- Rio de Janeiro
- Brazil
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Abstract
With regular practice, resistance exercise can lead to gains in skeletal muscle mass by means of hypertrophy. The process of skeletal muscle fiber hypertrophy comes about as a result of the confluence of positive muscle protein balance and satellite cell addition to muscle fibers. Positive muscle protein balance is achieved when the rate of new muscle protein synthesis (MPS) exceeds that of muscle protein breakdown (MPB). While resistance exercise and postprandial hyperaminoacidemia both stimulate MPS, it is through the synergistic effects of these two stimuli that a net gain in muscle proteins occurs and muscle fiber hypertrophy takes place. Current evidence favors the post-exercise period as a time when rapid hyperaminoacidemia promotes a marked rise in the rate of MPS. Dietary proteins with a full complement of essential amino acids and high leucine contents that are rapidly digested are more likely to be efficacious in this regard. Various other compounds have been added to complete proteins, including carbohydrate, arginine and glutamine, in an attempt to augment the effectiveness of the protein in stimulating MPS (or suppressing MPB), but none has proved particularly effective. Evidence points to a higher protein intake in combination with resistance exercise as being efficacious in allowing preservation, and on occasion increases, in skeletal muscle mass with dietary energy restriction aimed at the promotion of weight loss. The goal of this review is to examine practices of protein ingestion in combination with resistance exercise that have some evidence for efficacy and to highlight future areas for investigation.
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Wilson JM, Wilson SM, Loenneke JP, Wray M, Norton LE, Campbell BI, Lowery RP, Stout JR. Effects of Amino Acids and their Metabolites on Aerobic and Anaerobic Sports. Strength Cond J 2012. [DOI: 10.1519/ssc.0b013e31825663bd] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Howarth KR, Phillips SM, MacDonald MJ, Richards D, Moreau NA, Gibala MJ. Effect of glycogen availability on human skeletal muscle protein turnover during exercise and recovery. J Appl Physiol (1985) 2010; 109:431-8. [DOI: 10.1152/japplphysiol.00108.2009] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We examined the effect of carbohydrate (CHO) availability on whole body and skeletal muscle protein utilization at rest, during exercise, and during recovery in humans. Six men cycled at ∼75% peak O2 uptake (V̇o2peak) to exhaustion to reduce body CHO stores and then consumed either a high-CHO (H-CHO; 71 ± 3% CHO) or low-CHO (L-CHO; 11 ± 1% CHO) diet for 2 days before the trial in random order. After each dietary intervention, subjects received a primed constant infusion of [1-13C]leucine and l-[ring-2H5]phenylalanine for measurements of the whole body net protein balance and skeletal muscle protein turnover. Muscle, breath, and arterial and venous blood samples were obtained at rest, during 2 h of two-legged kicking exercise at ∼45% of kicking V̇o2peak, and during 1 h of recovery. Biopsy samples confirmed that the muscle glycogen concentration was lower in the L-CHO group versus the H-CHO group at rest, after exercise, and after recovery. The net leg protein balance was decreased in the L-CHO group compared with at rest and compared with the H-CHO condition, which was primarily due to an increase in protein degradation (area under the curve of the phenylalanine rate of appearance: 1,331 ± 162 μmol in the L-CHO group vs. 786 ± 51 μmol in the H-CHO group, P < 0.05) but also due to a decrease in protein synthesis late in exercise. There were no changes during exercise in the rate of appearance compared with rest in the H-CHO group. Whole body leucine oxidation increased above rest in the L-CHO group only and was higher than in the H-CHO group. The whole body net protein balance was reduced in the L-CHO group, largely due to a decrease in whole body protein synthesis. These data extend previous findings by others and demonstrate, using contemporary stable isotope methodology, that CHO availability influences the rates of skeletal muscle and whole body protein synthesis, degradation, and net balance during prolonged exercise in humans.
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Affiliation(s)
- Krista R. Howarth
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Stuart M. Phillips
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Maureen J. MacDonald
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Douglas Richards
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Natalie A. Moreau
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Martin J. Gibala
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
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Howarth KR, Moreau NA, Phillips SM, Gibala MJ. Coingestion of protein with carbohydrate during recovery from endurance exercise stimulates skeletal muscle protein synthesis in humans. J Appl Physiol (1985) 2008; 106:1394-402. [PMID: 19036894 DOI: 10.1152/japplphysiol.90333.2008] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Coingestion of protein with carbohydrate (CHO) during recovery from exercise can affect muscle glycogen synthesis, particularly if CHO intake is suboptimal. Another potential benefit of protein feeding is an increased synthesis rate of muscle proteins, as is well documented after resistance exercise. In contrast, the effect of nutrient manipulation on muscle protein kinetics after aerobic exercise remains largely unexplored. We tested the hypothesis that ingesting protein with CHO after a standardized 2-h bout of cycle exercise would increase mixed muscle fractional synthetic rate (FSR) and whole body net protein balance (WBNB) vs. trials matched for total CHO or total energy intake. We also examined whether postexercise glycogen synthesis could be enhanced by adding protein or additional CHO to a feeding protocol that provided 1.2 g CHO x kg(-1) x h(-1), which is the rate generally recommended to maximize this process. Six active men ingested drinks during the first 3 h of recovery that provided either 1.2 g CHO.kg(-1).h(-1) (L-CHO), 1.2 g CHO + 0.4 g protein x kg(-1) x h(-1) (PRO-CHO), or 1.6 g CHO x kg(-1) x h(-1) (H-CHO) in random order. Based on a primed constant infusion of l-[ring-(2)H(5)]phenylalanine, analysis of biopsies (vastus lateralis) obtained at 0 and 4 h of recovery showed that muscle FSR was higher (P < 0.05) in PRO-CHO (0.09 +/- 0.01%/h) vs. both L-CHO (0.07 +/- 0.01%/h) and H-CHO (0.06 +/- 0.01%/h). WBNB assessed using [1-(13)C]leucine was positive only during PRO-CHO, and this was mainly attributable to a reduced rate of protein breakdown. Glycogen synthesis rate was not different between trials. We conclude that ingesting protein with CHO during recovery from aerobic exercise increased muscle FSR and improved WBNB, compared with feeding strategies that provided CHO only and were matched for total CHO or total energy intake. However, adding protein or additional CHO to a feeding strategy that provided 1.2 g CHO x kg(-1) x h(-1) did not further enhance glycogen resynthesis during recovery.
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Affiliation(s)
- Krista R Howarth
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
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Glover EI, Phillips SM, Oates BR, Tang JE, Tarnopolsky MA, Selby A, Smith K, Rennie MJ. Immobilization induces anabolic resistance in human myofibrillar protein synthesis with low and high dose amino acid infusion. J Physiol 2008; 586:6049-61. [PMID: 18955382 DOI: 10.1113/jphysiol.2008.160333] [Citation(s) in RCA: 297] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
We tested the hypothesis that increasing blood amino acid (AA) availability would counter the physical inactivity-induced reduction in muscle protein synthesis. We determined how 14 days of unilateral knee immobilization affected quadriceps myofibrillar protein synthesis (MPS) in young healthy subjects (10 men, 2 women, 21 +/- 1 years; 80.2 +/- 4.0 kg, mean +/- S.E.M.) in the post-absorptive state and after infusing AA (10% Primene) at low or high doses (43 and 261 mg kg(-1) h(-1)). Muscle cross-sectional area (MRI) and peak isometric torque declined in the immobilized leg (-5.0 +/- 1.2% and -25 +/- 3%, respectively, both P < 0.005), but were unchanged (all P > 0.6) in the non-immobilized leg. Immobilization induced a 27% decline in the rate of post-absorptive MPS (immobilized, 0.027 +/- 0.003: non-immobilized, 0.037 +/- 0.003% h(-1); P < 0.001). Regardless of dose, AA infusion stimulated a greater rise in MPS in the non-immobilized legs; at 4 h MPS was greater by +54 +/- 12% with low dose and +68 +/- 17% with high dose AA infusion (both P < 0.001). There was some evidence of delayed responsiveness of phosphorylation of Akt to high doses of AA and p70S6k at both doses but no marked differences in that of mTOR, GSK3beta or eEF2. Phosphorylation of focal adhesion kinase (Tyr(576/577)) was reduced (P < 0.05) with immobilization. We observed no change in polyubiquitinated protein content after immobilization. We confirm that 14 days of immobilization reduces MPS in the post-absorptive state and this diminution is reduced but not abolished by increased provision of AA, even at high rates. The immobilization-induced decline in post-absorptive MPS with the 'anabolic resistance' to amino acids can account for much of immobilization-induced muscle atrophy.
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Affiliation(s)
- Elisa I Glover
- Department of Kinesiology - Exercise Metabolism Research Group, McMaster University, 1280 Main St West, Hamilton, ON L8S 4K1, Canada
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Tang JE, Manolakos JJ, Kujbida GW, Lysecki PJ, Moore DR, Phillips SM. Minimal whey protein with carbohydrate stimulates muscle protein synthesis following resistance exercise in trained young men. Appl Physiol Nutr Metab 2008; 32:1132-8. [PMID: 18059587 DOI: 10.1139/h07-076] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Whey protein is a supplemental protein source often used by athletes, particularly those aiming to gain muscle mass; however, direct evidence for its efficacy in stimulating muscle protein synthesis (MPS) is lacking. We aimed to determine the impact of consuming whey protein on skeletal muscle protein turnover in the post-exercise period. Eight healthy resistance-trained young men (age=21+/-1 .0 years; BMI=26.8+/-0.9 kg/m2 (means+/-SE)) participated in a double-blind randomized crossover trial in which they performed a unilateral leg resistance exercise workout (EX: 4 sets of knee extensions and 4 sets of leg press; 8-10 repetitions/set; 80% of maximal), such that one leg was not exercised and acted as a rested (RE) comparator. After exercise, subjects consumed either an isoenergetic whey protein plus carbohydrate beverage (WHEY: 10 g protein and 21 g fructose) or a carbohydrate-only beverage (CHO: 21 g fructose and 10 g maltodextran). Subjects received pulse-tracer injections of L-[ring-2H5]phenylalanine and L-[15N]phenylalanine to measure MPS. Exercise stimulated a rise in MPS in the WHEY-EX and CHO-EX legs, which were greater than MPS in the WHEY-RE leg and the CHO-RE leg (all p<0.05), respectively. The rate of MPS in the WHEY-EX leg was greater than in the CHO-EX leg (p<0.001). We conclude that a small dose (10 g) of whey protein with carbohydrate (21 g) can stimulate a rise in MPS after resistance exercise in trained young men that would be supportive of a positive net protein balance, which, over time, would lead to hypertrophy.
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Affiliation(s)
- Jason E Tang
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4K1, Canada
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Tarnopolsky MA. Building muscle: nutrition to maximize bulk and strength adaptations to resistance exercise training. Eur J Sport Sci 2008. [DOI: 10.1080/17461390801919128] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
Glutamine is a popular dietary supplement consumed for purported ergogenic benefits of increased strength, quicker recovery, decreased frequency of respiratory infections, and prevention of overtraining. From a biochemical standpoint, glutamine does play a physiologic role in each of these areas, but it remains only one of a host of factors involved. This review examines the effects of glutamine on exercise and demonstrates a lack of evidence for definitive positive ergogenic benefits as a result of glutamine supplementation.
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Glutamine. Curr Sports Med Rep 2007. [DOI: 10.1097/01.csmr.0000306482.07906.d3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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