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What are the effects of dietary protein intake and resistance exercise on skeletal muscle mass in elderly people?

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What are the effects of dietary protein intake and resistance exercise on skeletal muscle mass in elderly people?

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Objective There is an age related loss of skeletal muscle mass which has adverse outcomes that influence the quality of life in elderly people. This review lines out what the effects are of resistance training, dietary protein intake and the combination of these on skeletal muscle mass in the aged population to counteract this process. Methods Relevant articles were searched trough Medline database up to January 2010. Studies were obtained by consulting experts, references and abstracts. Reviews, meta-analyses and clinical trials were used to clarify different mechanisms and to obtain results from earlier studies. Results Resistance exercise is found to have a stimulating effect on skeletal muscle protein balance and result in increases in strength, skeletal muscle mass and function. Dietary protein stimulates muscle protein synthesis in a greater degree and results in net positive protein balance. The long term effects of supplemented dietary protein in elderly people are increases in skeletal muscle mass, strength and physical function. However, the post-exercise muscle anabolism seems to be most effective after a combination of resistance exercise and dietary derived essential amino acids. There is still no consensus about the amount of protein intake, source and timing of ingestion. More research is needed to clarify to interactive effect between dietary protein intake, resistance exercise and skeletal muscle adaptive response. Conclusion Resistance exercise can effectively offset the progression of sarcopenia. In addition to this an extra amount in dietary protein is found to be beneficial in increasing skeletal muscle mass and muscle strength. A combination of resistance type training and additional dietary protein intake could have a greater effect on increasing skeletal muscle mass and strength. However, limited studies are showing results of long term research of hypertrophy in the skeletal muscle in elderly people. Future studies should focus on prolonged timed dietary protein intake in a resistance exercise training program to help preventing the loss of skeletal muscle mass and slow down the process of sarcopenia.

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OrganisatieHogeschool van Amsterdam
InstituutBewegen, Sport en Voeding
Gepubliceerd in
Jaar2010
TypeBachelorscriptie
TaalEngels

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