View clinical trials related to Sarcopenia.
Filter by:Age-related sarcopenia is associated with increased morbidity, mortality, disability and reduced resistance to metabolic stress. The aim of this study is to assess the effects of resistance training, associated or not with oral nutritional supplements, on skeletal muscle mass in sarcopenic subjects. This is a prospective randomised controlled single-centre study that will last two years, three months for a participant. 200 healthy elderly (70-80 years old) subjects will be screened for sarcopenia by dual energy X-ray absorptiometry. 128 sarcopenic subjects will be randomized into 4 groups: - group 1: controls - group 2: oral nutritional supplement (260 kcal and 20 g protein per day) - group 3: resistance training (3 times per week) - group 4: oral nutritional supplement + resistance training Every subject will be assessed at the beginning and at the end of 12 weeks of intervention on: - muscle mass (DXA) - muscle function (dynamometers) - hormonal (testosterone, GH, IGF-1, cortisol) and inflammatory (IL-6, TNF-alpha) profiles - food intake. Ten subjects in group 4 will undergo a muscle biopsy (quadriceps) before and after the intervention in order to explore protein and mRNA levels of the mTOR pathway, which may be involved in sarcopenia.
In the present study the investigators aim to determine whether protein supplementation can augment the response to a 12 week resistance training program in healthy elderly men.
The purpose of this study is to examine whether adding the basic salt potassium bicarbonate to the diet will have a positive effect on how dietary protein affects your bone and muscle.
To reach the goals of living longer in better medical conditions, many countries reach the same conclusion: new strategies have to be developed to avoid, or at least limit, the effects of age; this requires a better knowledge of the mechanisms of aging. Our project focuses on the loss of muscle mass associated with aging, called sarcopenia. Sarcopenia unavoidably leads to impaired mobility and poor balance, which contributes to loss of functional autonomy and to increased prevalence for severe falls. Skeletal muscle also plays a central role as a reserve for energy and amino acids. Hence, sarcopenia further triggers severe side metabolic effects such as frailty among elderly persons. The precise mechanisms of muscle aging are still mostly unknown, although many theories have been proposed. The present study aims at better understanding the mechanisms of skeletal muscle loss associated with aging. Using muscle biopsies from young and old subjects, the differential expression profiles of mRNA will be obtained through chips that will evaluate more than 39000 transcripts. On the same samples, proteomic analyses will involve two complementary approaches: (1) bidimensional electrophoresis (2DGE) coupled to mass spectrometry (MALDI-ToF) for dominant proteins; (2) Western-blot (more than 800 antibodies) targeting regulating proteins not detectable using 2DGE. Complementary histological studies (immunohisto-fluorescence, confocal microscopy) will specify the localisation of the major biomarkers in the muscle biopsies. The results of that research will have applications in the medium term and will lead to nutritional interventions to modulate specific metabolic pathways and improve the quality of life in the elderly.
Muscle loss with aging is a significant contributor to disability in older people. Our general hypothesis is that loss of muscle with aging, known as sarcopenia, may be due to inability of muscle to grow in response to insulin. Our goal is to determine the mechanisms underlying this age-related insulin resistance of muscle proteins, which will allow us to define in the future specific interventions to target this defect and provide the scientific basis for the prevention and treatment of sarcopenia.
Aging is associated with the loss of lean muscle mass, termed sarcopenia. Food intake and in particular the ingestion of protein or amino acids has been shown to be a powerful stimulus to promote net muscle protein anabolism. However this anabolic response following a meal-like protein bolus seems to be blunted in the elderly as compared to young adults. The first aim of this proposal is to investigate the post-prandial muscle protein synthesis rates in young and elderly men in response to a meal-like protein bolus after a period of rest or physical activity (study A). The rest trial (REST) will act as a proof-of-principle study to examine the blunted protein synthetic response in the elderly, and as a control trial in comparison with the exercise trial (EXC) to establish the surplus value of physical activity prior to protein intake on muscle protein synthesis. The second aim of this proposal is to determine the surplus value of an increased quantity of the ingested protein bolus (study B). Large amounts of protein (40 and 60 g) will be compared to a meal-like amount of protein (20 g) as a means to maximize plasma amino acid availability and/or to stimulate muscle protein anabolism. The third aim of this proposal is to study the differences in quality of the ingested protein bolus (study C). Instead of significantly increasing the quantity of the protein bolus, we will also apply a more practical approach to augment skeletal muscle protein synthesis rates; modifying the digestibility or amino acid composition of a meal-like protein bolus.
A study to evaluate the safety, tolerability, and efficacy of MK-0773 in women with sarcopenia (loss of muscle mass).
The purpose of this study is to determine whether a higher-than-replacement dose of testosterone and finasteride can be combined to safely increase muscle strength in older men who have a low blood concentration of testosterone.
We examined whether creatine monohydrate (CrM) and conjugated linoleic acid (CLA) could enhance strength gains and improve body composition (i.e., increase fat-free mass (FFM); decrease body fat) following resistance exercise training in older adults (> 65 y). Our study hypothesized that administering CrM and CLA would yield greater strength and body composition benefits than the placebo group over the six months of resistance exercise
Loss of muscle mass and functional ability is a major concern for older individuals. Aging is associated with increased inflammation caused by release of hormone-like compounds termed "cytokines" which are involved in muscle protein degradation. Diets rich in ω-3 fatty acids decrease the production of pro-inflammatory cytokines, possibly by inhibiting production of lipids involved in cytokine synthesis. Our purpose is to assess the effect of dietary supplementation with an ω-3 fatty acid, α-linolenic acid (ALA) commonly found in flaxseed, combined with resistance training on pro-inflammatory cytokines, strength, and muscle mass in older adults. Progressive resistance training is considered to be the standard for increasing strength and muscle mass in older adults. We hypothesize that combining the two interventions will improve strength and muscle mass more than resistance training alone by modulating the inflammatory process associated with aging. Our proposed research will compare older individuals supplementing with ALA and placebo during a resistance training program.