#for_researcher

Neuromuscular function in different stages of sarcopenia

T. Morat, K.J. Gilmore and C.L. Rice

Exp Gerontol. 2016;81:28-36

This study applied the screening tool developed by the European Working Group on Sarcopenia in Older People (EWGSOP) on seniors aged over 65years and concurrently tested various laboratory-based indices of neuromuscular function. Based on gait speed, handgrip strength and muscle mass all subjects were categorized into one of the three conceptual sarcopenia stages (pre-sarcopenia, sarcopenia, severe sarcopenia). The laboratory tests found neuromuscular differences among the 3 groups which generally supported the classification scheme and helped to illustrate some key factors that could explain differences in functional capacities.

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High Levels of Heavy Metals Increase the Prevalence of Sarcopenia in the Elderly Population

J.I. Yoo, Y.C. Ha, Y.K. Lee, et al.

J Bone Metab. 2016;23(2):101-9

Despite increasing concern regarding health problems as a result of environmental pollutants, no association of toxic heavy metals with sarcopenia has been demonstrated in the general population. In this article the association of heavy metals, including lead, mercury and cadmium, with sarcopenia in the Korean population was investigated. This study demonstrates that high levels of blood lead, mercury and cadmium increase the prevalence of sarcopenia in both genders of elderly populations.

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Effect of dietary n-3 PUFA supplementation on the muscle transcriptome in older adults

J. Yoshino , G.I. Smith, S.C. Kelly, et al.

Physiol Rep. 2016;4(11). pii: e12785

In this study, we used muscle biopsy samples collected during a recently completed randomized controlled trial that found that n-3 PUFA therapy increased muscle mass and function in older adults to provide a comprehensive assessment of the effect of n-3 PUFA therapy on the skeletal muscle gene expression profile in these people. Data obtained suggest that n-3 PUFA therapy results in small but coordinated changes in the muscle transcriptome that may help explain the n-3 PUFA-induced improvements in muscle mass and function.

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Physical Activity Performed in the Evening Increases the Overnight Muscle Protein Synthetic Response to Presleep Protein Ingestion in Older Men

A.M. Holwerda, I.W. Kouw, J. Trommelen, et al.

J Nutr. 2016;146(7):1307-14

The present study assessed whether physical activity performed in the evening can augment the overnight muscle protein synthetic response to presleep protein ingestion in older men. Physical activity performed in the evening augments the overnight muscle protein synthetic response to presleep protein ingestion and allows more of the ingested protein-derived amino acids to be used for de novo muscle protein synthesis during overnight sleep in older men.

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Caloric restriction and aerobic exercise in sarcopenic and non-sarcopenic obese women: an observational and retrospective study

S. Barbat-Artigas, S. Garnier, S. Joffroy, et al.

J Cachexia Sarcopenia Muscle. 2016;7(3):284-9

The objective of this observational and retrospective study was to verify the effect of a mixed weight loss programme combining caloric restriction and exercise on body composition, and lipid-lipoprotein profile of obese women according to their sarcopenic status. Data obtained suggest that a short weight loss programme combining caloric restriction and aerobic exercise may significantly reduce fat mass and improve lipid-lipoprotein profile in obese women, independently of their sarcopenic status. Such programmes may have deleterious effects on lean mass in non-sarcopenic obese subjects, only.

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Successful Aging and Frailty: Opposite Sides of the Same Coin?

J. Woo, J. Leung and T. Zhang

J Am Med Dir Assoc. 2016;17(9):797-801

This study explore the hypothesis that frailty and successful aging are two sides of the same coin and that walking speed may be an objective indicator of successful aging. Fast walkers had better self-rated health, lower prevalence of stroke, hypertension, cataracts, osteoporosis, and impaired cognitive function. They were more likely to be current alcohol users, more physically active, consumed more vegetables, had better physical component of health-related quality of life, and received more education. They also had lower body mass index, percentage whole body fat as well as appendicular fat, and higher appendicular muscle mass index.

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Accelerometer-determined physical activity, muscle mass, and leg strength in community-dwelling older adults

Y.C. Foong, N. Chherawala, D. Aitken, et al.

J Cachexia Sarcopenia Muscle. 2015;7(3):275-83

The aim of this study was to describe the relationship between accelerometer-determined physical activity (PA), muscle mass, and lower-limb strength in community-dwelling older adults. Using accelerometer technology, both the amount and intensity of accelerometer-determined PA had an independent, dose-response relationship with lean mass percentage and lower limb strength, with the largest effect for vigorous activity. Time spent in sedentary activity was negatively associated with lean mass percentage, but was not associated with lower limb strength. The magnitude of the association between PA and lean mass percentage decreased with age.

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A Multicomponent Exercise Intervention that Reverses Frailty and Improves Cognition, Emotion, and Social Networking in the Community-Dwelling Frail Elderly: A Randomized Clinical Trial

F.J. Tarazona-Santabalbina, M.C. Gómez-Cabrera, P. Pérez-Ros, et al.

J Am Med Dir Assoc. 2016;17(5):426-33

The aim of this study is to ascertain if a supervised-facility multicomponent exercise program (MEP) when performed by frail older persons can reverse frailty and improve functionality; cognitive, emotional, and social networking; as well as biological biomarkers of frailty, when compared with a controlled population that received no training. 

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Prevention of frailty through narrative intervention

S. Freitag and S. Schmidt

Soc Sci Med. 2016;160:120-7

The aim of this study is to investigate the effects of a biographical disclosure intervention on psychological frailty and health in older adults. The results of the intervention indicate a short-term positive effect on frailty and mental health in elderly people, who benefitted from the disclosure intervention in terms of improved mental health and lower frailty levels.

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The impact of sleep on age-related sarcopenia: Possible connections and clinical implications

R.D. Piovezan, J. Abucham, R.V. Dos Santos, et al.

Ageing Res Rev. 2015 ;23(Pt B):210-20

Reductions in duration and quality of sleep and increases in prevalence of circadian rhythm and sleep disorders with age favor proteolysis, modify body composition and increase the risk of insulin resistance, all of which have been associated with sarcopenia. Therapeutic approaches targeting sleep disturbances to normalize circadian rhythms and sleep homeostasis may represent a novel strategy to preserve or recover muscle health in older adults.

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