INTRODUCTION

Sarcopenia is the loss of muscle mass and strength that occurs with advancing age [1]. Although definitions (and therefore estimates of prevalence) vary, it is widely recognised as a common condition among older adults, and one that is associated with huge personal and financial costs [1, 2]. Declining muscle mass and strength are expected components of ageing. However, the rate of decline differs across the population [1, 3], suggesting that modifiable behavioural factors such as diet and lifestyle may be important influences on muscle function in older age. This paper considers the evidence that links diet to muscle mass and strength, and implications for strategies to prevent or delay sarcopenia in older age. Read More

INTRODUCTION

Sarcopenia is a progressive, insidious process characterized by 3–8% reduction in lean muscle mass per decade after the age of 30 years. It is thought to affect 30% of individuals over 60 years of age and more than 50% of those over 80 years [1]. Research continues to focus on the mechanisms contributing to sarcopenia. This has included studies focusing on protein metabolism and cell signaling, voluntary or imposed reductions in physical activity, protein energy malnutrition and reduced anabolic efficiency to protein ingestion [2–4,5•]. Although protein synthesis and ultimately skeletal muscle mass are regulated by a host of factors, the fundamental prerequisite for muscle protein synthesis is dietary derived amino acids. The purpose of this review is to highlight recent research examining the role of protein in the prevention or management of sarcopenia and provide recommendations on the amount of protein needed with each meal to preserve skeletal muscle mass in ageing.

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