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Roman-Liu D, Kamińska J, Tokarski TM. Population-specific equations of age-related maximum handgrip force: a comprehensive review. PeerJ 2024; 12:e17703. [PMID: 39056055 PMCID: PMC11271657 DOI: 10.7717/peerj.17703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 06/18/2024] [Indexed: 07/28/2024] Open
Abstract
Background The measurement of handgrip force responses is important in many aspects, for example: to complement neurological assessments, to investigate the contribution of muscle mass in predicting functional outcomes, in setting realistic treatment goals, evaluating rehabilitation strategies. Normative data about handgrip force can assist the therapist in interpreting a patient's results compared with healthy individuals of the same age and gender and can serve as key decision criteria. In this context, establishing normative values of handgrip strength is crucial. Hence, the aim of the this study is to develop a tool that could be used both in rehabilitation and in the prevention of work-related musculoskeletal disorders. This tool takes the form of population-specific predictive equations, which express maximum handgrip force as a function of age. Methodology In order to collect data from studies measuring maximum handgrip force, three databases were searched. The search yielded 5,058 articles. Upon the removal of duplicates, the screening of abstracts and the full-text review of potentially relevant articles, 143 publications which focussed on experimental studies on various age groups were considered as fulfilling the eligibility criteria. A comprehensive literature review produced 1,276 mean values of maximum handgrip force. Results A meta-analysis resulted in gender- and world region-specific (general population, USA, Europe and Asia) equations expressing maximum force as a function of age. The equations showed quantitative differences and trends in maximum handgrip force among age, gender and national groups. They also showed that values of maximum handgrip force are about 40% higher for males than for females and that age-induced decrease in force differs between males and females, with a proved 35% difference between the ages of 35 and 75. The difference was lowest for the 60-64 year olds and highest for the 18-25 year-olds. The equations also showed that differences due to region are smaller than those due to age or gender. Conclusions The equations that were developed for this study can be beneficial in setting population-specific thresholds for rehabilitation programmes and workstation exposure. They can also contribute to the modification of commonly used methods for assessing musculoskeletal load and work-related risk of developing musculoskeletal disorders by scaling their limit values.
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Affiliation(s)
- Danuta Roman-Liu
- Ergonomics, Central Institute for Labour Protection–National Research Institute, Warsaw, Poland
| | - Joanna Kamińska
- Ergonomics, Central Institute for Labour Protection–National Research Institute, Warsaw, Poland
| | - Tomasz Macjej Tokarski
- Ergonomics, Central Institute for Labour Protection–National Research Institute, Warsaw, Poland
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Buckinx F, Aubertin-Leheudre M, Daoust R, Hegg S, Martel D, Martel-Thibault M, Sirois MJ. Impacts of Remote Physical Exercises on Functional Status and Mobility among Community-Dwelling Pre-Disabled Seniors during the Covid-19 Lockdown. J Nutr Health Aging 2023; 27:354-361. [PMID: 37248759 PMCID: PMC10155135 DOI: 10.1007/s12603-023-1914-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/31/2023] [Indexed: 05/31/2023]
Abstract
OBJECTIVES To assess whether remote physical exercise interventions helped maintain function in daily life, level of physical activities, basic mobility and frailty status in pre-disabled seniors during the first Covid-19 lockdown. DESIGN This is an interventional study conducted from May 2020 to May 2021. SETTING Community-dwelling older adults in 2 Canadian cities. PARTICIPANTS 84 pre-disabled seniors. INTERVENTION 12-week physical exercise programs (1 hour/ 3 times/ week) in kinesiologist-guided groups using Zoom or phone-supervised individual booklet-based home-program (n=44) vs. Control (usual life habits; n=40). MEASUREMENTS Functional status in daily activities (OARS scale); Daily level of aerobic (TAPA-1) and strengthening/flexibility (TAPA-2) physical activities; Basic mobility abilities (SPPB: balance, lower limbs strength, walking speed; Timed Up-and-Go) and Frailty (SOF index) were assessed at baseline and at 3, 6, 9 and 12-month follow-ups. RESULTS The participants' mean age was 78.5 ± 7.2 and 76.5 % were women. There was a group * time effect for the OARS scale (p=0.02), the TAPA-1 (p=0.06) and the TAPA-2 (p=0.007) scores. For these outcomes, scores significantly improved during the first 3 months of follow-up and then stabilised in the intervention group whereas they remained constant in the control group over time. There was an overall time effect for the SPPB (p=0.004), the 4-m walking speed (p=0.02) and for the SOF index (p=0.004), with no between-group differences. Finally, no effect was observed for the TUG. CONCLUSION Remote home-based physical exercise interventions and monitoring during the first Covid-19 lockdown seemed to have helped maintain seniors' level of physical activities without impacting on basic mobility abilities. Further studies are needed to identify parameters of remote exercise programs that can improve daily function and mobility in this population.
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Affiliation(s)
- F Buckinx
- Marie-Josée Sirois, PhD, 1435 de Longueuil, Québec, Qc, G1S 2G2, Canada, e-mail:
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Schaun GZ, Bamman MM, Alberton CL. High-velocity resistance training as a tool to improve functional performance and muscle power in older adults. Exp Gerontol 2021; 156:111593. [PMID: 34656749 DOI: 10.1016/j.exger.2021.111593] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/28/2021] [Accepted: 10/08/2021] [Indexed: 12/17/2022]
Abstract
The aging process results in several physiological impairments that, in turn, may predispose older individuals to a series of restrictions on their functional capacity. These impairments are important to understand so that suitable conditions for healthier aging can be pursued. In this review, we first summarize the effects of aging on the neuromuscular system, as well as on the relation between the main age-associated physiological impairments and functional performance with an emphasis on muscle power output. We then proceed to discuss the effects of resistance training, specifically high-velocity resistance training (HVRT), on the aforementioned neuromuscular impairments, and on functional performance in healthy and mobility-limited older adults. Collectively, available evidence suggests that HVRT seems to be a safe and effective intervention for improving muscle power, functional performance, and mobility of older individuals. It also seems that mobility-limited older adults may improve power and functional performance to a greater extent than their healthy counterparts after HVRT, which is in line with the principle of diminishing returns. Considering that only a very limited number of investigations directly compared the effects of HVRT in more than one of the aforementioned groups, studies comparing the adaptations to HVRT of middle-aged adults and older adults with distinct functional capacities would be valuable to determine whether there are differences in neuromuscular adaptations, functional performance, and functional reserve among these groups.
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Affiliation(s)
- Gustavo Z Schaun
- Neuromuscular Assessment Laboratory, Physical Education School, Federal University of Pelotas, Pelotas, RS, Brazil; UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, AL, United States of America.
| | - Marcas M Bamman
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, AL, United States of America; Florida Institute for Human and Machine Cognition, Pensacola, FL, United States of America
| | - Cristine L Alberton
- Neuromuscular Assessment Laboratory, Physical Education School, Federal University of Pelotas, Pelotas, RS, Brazil
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Hsu KJ, Chien KY, Tsai SC, Tsai YS, Liao YH, Chen JJ, Chen YR, Chen CN. Effects of Exercise Alone or in Combination with High-Protein Diet on Muscle Function, Aerobic Capacity, and Physical Function in Middle-Aged Obese Adults: A Randomized Controlled Trial. J Nutr Health Aging 2021; 25:727-734. [PMID: 34179925 DOI: 10.1007/s12603-021-1599-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Obesity accelerates and exacerbates the age-related changes on muscle function and exercise capacity. In addition, the middle-aged population is often overlooked when talking about the prevention of sarcopenia. This study investigated the effects of exercise alone or in combination with a high-protein diet on muscle function and physical fitness in middle-aged obese adults. MATERIALS AND METHODS Sixty-nine middle-aged (50-64 years old) obese adults were randomly assigned to one of the following groups: control group (C; n=23), exercise group (E; n=23) or exercise plus high-protein group (EP; n=23). Individuals within the E and EP groups received 12 weeks of exercise training; whereas, the individuals in the EP group also received a high-protein diet intervention (1.6g/kg/day). Individuals within the C group were asked to maintain their lifestyle for 12 weeks. Participants were evaluated before and after the intervention. Outcome measures included maximal exercise capacity, muscle function and functional physical performance. Analysis of covariance was used to determine the effects of the intervention. RESULTS After the intervention, the E and EP groups had greater maximal work rate, peak oxygen consumption, and muscle power during muscle contractions at 180°/sec than that in the C group (P<0.05). The EP group, but not the E group, showed significant improvement in the sit-to-stand test and climbing stairs test than the C group after the intervention (P<0.05). Within group comparisons showed that the anaerobic threshold only increased in the EP group (+12% from pre-test). CONCLUSIONS For middle-aged obese adults, exercise with a high-protein diet not only improved muscle power and exercise capacity but also enhanced their functional physical performance.
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Affiliation(s)
- K-J Hsu
- Chiao-Nan Chen, PhD, PT, Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, 155, Sec. 2, Li-nong St., Taipei 112, Taiwan, Phone: 886-2-28267164, E-mail:
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F B, L P C, V M, M D, G HB, G G, P G, P N, M AL. High intensity interval training combined with L-citrulline supplementation: Effects on physical performance in healthy older adults. Exp Gerontol 2020; 140:111036. [PMID: 32721549 DOI: 10.1016/j.exger.2020.111036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 06/25/2020] [Accepted: 07/20/2020] [Indexed: 12/25/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate the effect of citrulline (CIT) supplementation combined to high intensity interval training (HIIT) on physical performance in healthy older adults. METHODS This study is a secondary analysis from a double-blind, randomized trial. Among the participants (sedentary & inactive older adults aged over 65 yrs), 44 were non obese (BMI <30 kg/m2) and completed the intervention: Placebo + HIIT (PLA; n = 21) or CIT + HIIT (n = 23). All participants ingested either 10 g of CIT supplementation/day or placebo and followed HIIT sessions (30 min/session; cycle: 30 s > 85% of maximal heart rate (HR) and Borg scale >17/20 + 1:50 min at 65% HR and Borg scale between 13 and 16) on an elliptical device 3 times per week over a 12-week period. Body composition, muscle strength, muscle power, functional capacities (unipodal balance; self-paced and fast Timed Up and Go (nTUG; fTUG); chair test; step tests; 4-meter walking test; 6-minute walking test); dietary intake, energy expenditure and biological markers were measured pre and post-intervention. A repeated-measure analysis of variance was used to estimate time (HIIT intervention), group (PLA vs. CIT) and time*group effects. RESULTS The decrease in BMI (p = 0.02) and android fat mass (p = 0.05) were significantly greater in the HIIT+CIT group than in the HIIT+PLA group. Finally, a greater increase in self-paced gait speed (nTUG) (p = 0.02) and fast-paced gait speed (fTUG) (p = 0.03) were also observed in the HIIT+CIT group than in the HIIT+PLA group. CONCLUSION CIT supplementation combined to HIIT is more effective in improving functional capacities and body composition in healthy older adults than HIIT alone.
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Affiliation(s)
- Buckinx F
- Département des Sciences de l'Activité Physique, GRAPA, Université du Québec À Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Canada; WHO Collaborating Centre for Public Health Aspects of Musculoskeletal Health and Ageing, Liège, Belgium
| | - Carvalho L P
- Département des Sciences de l'Activité Physique, GRAPA, Université du Québec À Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Canada
| | - Marcangeli V
- Département des Sciences de l'Activité Physique, GRAPA, Université du Québec À Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Canada
| | - Dulac M
- Département des Sciences de l'Activité Physique, GRAPA, Université du Québec À Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Canada
| | - Hajj Boutros G
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Canada
| | - Gouspillou G
- Département des Sciences de l'Activité Physique, GRAPA, Université du Québec À Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Canada
| | - Gaudreau P
- Département de Médecine, Université de Montréal, Montréal, Canada; Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Canada
| | - Noirez P
- Département des Sciences de l'Activité Physique, GRAPA, Université du Québec À Montréal, Montréal, Canada; Inserm UMR S-1124 & IRMES EA7329, Université de Paris, Paris, France
| | - Aubertin-Leheudre M
- Département des Sciences de l'Activité Physique, GRAPA, Université du Québec À Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montréal, Canada.
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Is responsiveness of elderly individuals to resistance training related to habitual nutritional intake? An exploratory analysis of a randomized controlled trial. SPORT SCIENCES FOR HEALTH 2020. [DOI: 10.1007/s11332-020-00628-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Buckinx F, Aubertin-Leheudre M. Relevance to assess and preserve muscle strength in aging field. Prog Neuropsychopharmacol Biol Psychiatry 2019; 94:109663. [PMID: 31176745 DOI: 10.1016/j.pnpbp.2019.109663] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/05/2019] [Accepted: 05/30/2019] [Indexed: 01/06/2023]
Abstract
According to the revised European consensus on sarcopenia, muscle strength is the primary parameter of sarcopenia and is associated with adverse outcomes or physical limitation. This literature review aims to clarify how and why to measure and preserve muscle strength in older population. Overall, the relationship between muscle strength and physical function is impacted by level of muscle mass, the degree of obesity (BMI), age and physical activity. Therefore, these factors are to be considered in the evaluation of muscle strength. It is necessary to have objective, reliable and sensitive tools to assess muscle strength, in different populations to detect and quantify weakness, to adapt physical exercises to patients' capacity and to evaluate the effects of treatment. Handgrip strength measurement might be reasonable for clinical practice while the measurement of knee flexors/extensors strength with both 1RM and dynamometers is increasingly important yet restricted by the requirement of special equipment. Physical activity and nutrition are two important behavioral factors to maintain muscle strength. Combined exercise and nutrition interventions improved muscle strength to a more prominent degree than exercise or nutrition alone.
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Affiliation(s)
- F Buckinx
- Département des Sciences de l'activité physique, Groupe de Recherche en Activité Physique Adaptée (GRAPA), Université du Québec à Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Canada
| | - M Aubertin-Leheudre
- Département des Sciences de l'activité physique, Groupe de Recherche en Activité Physique Adaptée (GRAPA), Université du Québec à Montréal, Montréal, Canada; Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Canada.
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Initial Dietary Protein Intake Influence Muscle Function Adaptations in Older Men and Women Following High-Intensity Interval Training Combined with Citrulline. Nutrients 2019; 11:nu11071685. [PMID: 31336654 PMCID: PMC6683270 DOI: 10.3390/nu11071685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/11/2019] [Accepted: 07/15/2019] [Indexed: 12/21/2022] Open
Abstract
Background: This study evaluates whether the initial amount of dietary protein intake could influence the combined effect of high-intensity interval training (HIIT) and citrulline (CIT), or HIIT alone, on body composition, muscle strength, and functional capacities in obese older adults. Methods: Seventy-three sedentary obese older men and women who completed a 12-week elliptical HIIT program with double-blinded randomized supplementation of CIT or placebo (PLA) were divided into four groups according to their initial protein intake (CIT–PROT+: n = 21; CIT–PROT−: n = 19; PLA–PROT+: n = 19; PLA–PROT−: n = 14). Body composition (fat and fat-free masses), handgrip (HSr) strength, knee extensor (KESr) strength, muscle power, and functional capacities were measured pre-intervention and post-intervention. Results: Following the intervention, the four groups improved significantly regarding all the parameters measured. For the same initial amount of protein intake, the CIT–PROT− group decreased more gynoid fat mass (p = 0.04) than the PLA–PROT− group. The CIT–PROT+ group increased more KESr (p = 0.04) than the PLA–PROT+ group. In addition, the CIT–PROT− group decreased more gynoid FM (p = 0.02) and improved more leg FFM (p = 0.02) and HSr (p = 0.02) than the CIT–PROT+ group. Conclusion: HIIT combined with CIT induced greater positive changes than in the PLA groups. The combination seems more beneficial in participants consuming less than 1 g/kg/d of protein, since greater improvements on body composition and muscle strength were observed.
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Buckinx F, Gaudreau P, Marcangeli V, Boutros GEH, Dulac MC, Morais JA, Aubertin-Leheudre M. Muscle adaptation in response to a high-intensity interval training in obese older adults: effect of daily protein intake distribution. Aging Clin Exp Res 2019; 31:863-874. [PMID: 30806907 DOI: 10.1007/s40520-019-01149-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/11/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Aging is associated with declines in muscle mass, strength and quality, leading to physical impairments. An even protein distribution in daily meals has recently been proposed along with adequate total protein intake as important modulators of muscle mass. In addition, due to its short duration, high-intensity interval training (HIIT) has been highlighted as a promising intervention to prevent physical deterioration. However, the interaction between daily protein intake distribution and HIIT intervention in elderlies remain unknown. OBJECTIVE To investigate muscle adaptation following HIIT in older adults according to daily protein intake distribution. METHODS Thirty sedentary obese subjects who completed a 12-week elliptical HIIT program were matched [criteria: age (± 2 years), sex, BMI (± 2 kg/m2)] and divided a posteriori into 2 groups according to the amount of protein ingested at each meal: < 20 g in at least one meal (P20-, n = 15, 66.8 ± 3.7 years) and ≥ 20 g in each meal (P20+, n = 15, 68.1 ± 4.1 years). Body composition, functional capacity, muscle strength, muscle power, physical activity level, and nutritional intakes were measured pre- and post-intervention. A two way repeated ANOVA was used to determine the effect of the intervention (HIIT) and protein distribution (P20- vs P20+, p < 0.05). RESULTS No difference was observed at baseline between groups. Following the HIIT intervention, we observed a significant decrease in waist and hip circumferences and improvements in functional capacities in both P20- and P20 + group (p < 0.05). However, no protein distribution effect was observed. CONCLUSION A 12-week HIIT program is achievable and efficient to improve functional capacities as well as body composition in obese older adults. However, consuming at least 20 g of proteins in every meal does not further enhance muscle performance in response to a 12-week HIIT intervention.
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Affiliation(s)
- F Buckinx
- Département des Sciences de l'activité physique, Faculté des Sciences, UQAM, Groupe de Recherche en Activité Physique Adaptée (GRAPA), Université du Québec à Montréal, Pavillon Sciences Biologiques, SB-4615, 141, Avenue du Président Kennedy, Montréal, QC, H2X 1Y4, Canada
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Canada
- WHO Collaborating Centre for Public Health Aspects of Musculoskeletal Health and Ageing, Liège, Belgium
| | - P Gaudreau
- Département de médecine de l'Université de Montréal, Centre de recherche du Centre Hospitalier Universitaire de Montréal (CRCHUM), Université de Montréal, Montréal, Canada
| | - V Marcangeli
- Département des Sciences de l'activité physique, Faculté des Sciences, UQAM, Groupe de Recherche en Activité Physique Adaptée (GRAPA), Université du Québec à Montréal, Pavillon Sciences Biologiques, SB-4615, 141, Avenue du Président Kennedy, Montréal, QC, H2X 1Y4, Canada
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Canada
| | - G El Hajj Boutros
- Département des Sciences de l'activité physique, Faculté des Sciences, UQAM, Groupe de Recherche en Activité Physique Adaptée (GRAPA), Université du Québec à Montréal, Pavillon Sciences Biologiques, SB-4615, 141, Avenue du Président Kennedy, Montréal, QC, H2X 1Y4, Canada
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Canada
| | - M C Dulac
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Canada
| | - J A Morais
- Division of Geriatric Medicine, McGill University Health Centre (MUHC), McGill University, Montréal, QC, Canada
| | - M Aubertin-Leheudre
- Département des Sciences de l'activité physique, Faculté des Sciences, UQAM, Groupe de Recherche en Activité Physique Adaptée (GRAPA), Université du Québec à Montréal, Pavillon Sciences Biologiques, SB-4615, 141, Avenue du Président Kennedy, Montréal, QC, H2X 1Y4, Canada.
- Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal (CRIUGM), Montréal, Canada.
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Ni Lochlainn M, Bowyer RCE, Steves CJ. Dietary Protein and Muscle in Aging People: The Potential Role of the Gut Microbiome. Nutrients 2018; 10:E929. [PMID: 30036990 PMCID: PMC6073774 DOI: 10.3390/nu10070929] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/13/2018] [Accepted: 07/18/2018] [Indexed: 12/22/2022] Open
Abstract
Muscle mass, strength, and physical function are known to decline with age. This is associated with the development of geriatric syndromes including sarcopenia and frailty. Dietary protein is essential for skeletal muscle function. Resistance exercise appears to be the most beneficial form of physical activity for preserving skeletal muscle and a synergistic effect has been noted when this is combined with dietary protein. However, older adults have shown evidence of anabolic resistance, where greater amounts of protein are required to stimulate muscle protein synthesis, and response is variable. Thus, the recommended daily amount of protein is greater for older people. The aetiologies and mechanisms responsible for anabolic resistance are not fully understood. The gut microbiota is implicated in many of the postulated mechanisms for anabolic resistance, either directly or indirectly. The gut microbiota change with age, and are influenced by dietary protein. Research also implies a role for the gut microbiome in skeletal muscle function. This leads to the hypothesis that the gut microbiome might modulate individual response to protein in the diet. We summarise the existing evidence for the role of the gut microbiota in anabolic resistance and skeletal muscle in aging people, and introduce the metabolome as a tool to probe this relationship in the future.
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Affiliation(s)
- Mary Ni Lochlainn
- The Department of Twin Research, Kings College London, 3-4th Floor South Wing Block D, St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH, UK.
- Clinical Age Research Unit, Kings College Hospital Foundation Trust, London SE5 9RS, UK.
| | - Ruth C E Bowyer
- The Department of Twin Research, Kings College London, 3-4th Floor South Wing Block D, St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH, UK.
| | - Claire J Steves
- The Department of Twin Research, Kings College London, 3-4th Floor South Wing Block D, St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH, UK.
- Clinical Age Research Unit, Kings College Hospital Foundation Trust, London SE5 9RS, UK.
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