Effect of protein source on resistive-training-induced changes in body composition and muscle size in older men

Haub, Mark D.; Wells, Amanda M; Tarnopolsky, Mark A.; Campbell, Wayne W.

doi:10.1093/ajcn/76.3.511

Cited by 128 publications

(127 citation statements)

References 29 publications

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“…It is not immediately clear as to why meat proteins are superior to plant-based proteins in the stimulation of MPS, but it is not likely something driven by amino acid content (i.e., PDCAAS). It is noted, that in a follow-up study to the original observations Campbell et al (1999) and Haub, Wells, Tarnopolsky, and Campbell (2002) found no statistical difference in muscle mass gain between men who consumed meat-containing diets and men in lacto-ovo-vegetarian diets and performed resistance training despite a 43% greater increase in the muscle fiber area in the meat-consuming subjects.…”

Section: Dose-response Of Mpsmentioning

confidence: 84%

Nutrient-rich meat proteins in offsetting age-related muscle loss

Phillips

2012

Meat Science

106

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Section: Dose-response Of Mpsmentioning

confidence: 84%

Nutrient-rich meat proteins in offsetting age-related muscle loss

Phillips

2012

Meat Science

106

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“…In accordance, when habitual dietary protein intake is standardized at 0.9 g⅐kg Ϫ1 ⅐day Ϫ1 , exercise-induced increases in muscle mass become apparent, and a further increase in protein intake does not seem to have any additional effect (61). The latter might explain why most studies fail to observe any additional benefit of nutritional cointervention on the skeletal muscle adaptive response to prolonged resistance-type exercise training in the elderly (22,40,41,43,47,54,59,61,86,118,129). However, the absence of any benefits of nutritional cointervention may well be attributed to a less than optimal timing of amino acid and/or protein supplementation that was applied in these studies.…”

Section: Exercise Training In the Elderlymentioning

confidence: 88%

Aging, exercise, and muscle protein metabolism

Koopman¹,

Loon²

2009

Journal of Applied Physiology

304

212

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Koopman R, van Loon LJ. Aging, exercise, and muscle protein metabolism. J Appl Physiol 106: 2040 -2048. First published January 8, 2009 doi:10.1152/japplphysiol.91551.2008Aging is accompanied by a progressive loss of skeletal muscle mass and strength, leading to the loss of functional capacity and an increased risk of developing chronic metabolic disease. The age-related loss of skeletal muscle mass is attributed to a disruption in the regulation of skeletal muscle protein turnover, resulting in an imbalance between muscle protein synthesis and degradation. As basal (fasting) muscle protein synthesis rates do not seem to differ substantially between the young and elderly, many research groups have started to focus on the muscle protein synthetic response to the main anabolic stimuli, i.e., food intake and physical activity. Recent studies suggest that the muscle protein synthetic response to food intake is blunted in the elderly. The latter is now believed to represent a key factor responsible for the age-related decline in skeletal muscle mass. Physical activity and/or exercise stimulate postexercise muscle protein accretion in both the young and elderly. However, the latter largely depends on the timed administration of amino acids and/or protein before, during, and/or after exercise. Prolonged resistance type exercise training represents an effective therapeutic strategy to augment skeletal muscle mass and improve functional performance in the elderly. The latter shows that the ability of the muscle protein synthetic machinery to respond to anabolic stimuli is preserved up to very old age. Research is warranted to elucidate the interaction between nutrition, exercise, and the skeletal muscle adaptive response. The latter is needed to define more effective strategies that will maximize the therapeutic benefits of lifestyle intervention in the elderly. sarcopenia; nutrition; exercise training; muscle hypertrophy AT PRESENT, MANY DISCUSSIONS focus on the public health implications of global aging. The latter should not be a surprise, as demographics show that the world's population aged 60 yr and over will triple within 50 yr, from 600 million in the year 2000 to more than 2 billion by 2050. Two-thirds of the elderly people are presently living in the developed world, and this will continue to rise up to 75%. Due to greater longevity, the subpopulation of elderly people aged 80 yr and over is presently the fastest growing subpopulation in the developed world (130). This global aging will have a major impact on our healthcare system due to increased morbidity and greater need for hospitalization and/or institutionalization. Good health is essential for older people to remain independent and to continue to actively take part in family and community life. Life-long health promotion is warranted to prevent or delay the onset of noncommunicable and chronic metabolic diseases, like heart disease, stroke, cancer, and diabetes.One of the factors that plays an important role in the loss of functional performance and, as...

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“…Proteins: animal and vegetal sources When the total protein intake is adequate, the source of protein consumed (vegetal or animal) does not influence muscle strength and size [36] Increases in muscle strength and size were not influenced by the predominant source of protein consumed by older men with adequate total protein intake Branched chain amino acids (BCAAs), It is recommended to have an adequate daily leucine supplementation (3 g/day)…”

Section: Discussionmentioning

confidence: 99%

Novel Insights on Nutrient Management of Sarcopenia in the Elderly

Rondanelli¹,

Faliva²,

Monteferrario³

et al. 2016

Clinical Nutrition and Aging

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Sarcopenia is defined as a syndrome characterized by progressive and generalized loss of muscle mass and strength. The more rationale approach to delay the progression of sarcopenia is based on the combination of proper nutrition, possibly associated with the use of dietary supplements and a regular exercise program. We performed a narrative literature review to evaluate the till-now evidence regarding (1) the metabolic and nutritional correlates of sarcopenia; (2) the optimum diet therapy for the treatment of these abnormalities. This review included 67 eligible studies. In addition to the well recognized link between adequate intake of proteins/amino acids and sarcopenia, the recent literature underlines that in sarcopenic elderly subjects there is an unbalance in vitamin D synthesis and in omega-6/omega-3 PUFA ratio. Given the detrimental effect of these metabolic abnormalities, a change in the lifestyle must be the cornerstone in the treatment of sarcopenia. The optimum diet therapy for the sarcopenia treatment must aim at achieving specific metabolic goals, which must be reached through accession of the elderly to specific personalized dietary program aimed at achieving and/or maintaining muscle mass; increasing their intake of fish (4 times/week) or taking omega-3 PUFA supplements; taking vitamin D supplementation, if there are low serum levels.

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Effect of protein source on resistive-training-induced changes in body composition and muscle size in older men

Abstract: These data suggest that increases in muscle strength and size were not influenced by the predominant source of protein consumed by older men with adequate total protein intake.

Cited by 128 publications

References 29 publications

Nutrient-rich meat proteins in offsetting age-related muscle loss

Nutrient-rich meat proteins in offsetting age-related muscle loss

Aging, exercise, and muscle protein metabolism

Novel Insights on Nutrient Management of Sarcopenia in the Elderly

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