Sarcopenia and functional decline: pathophysiology, prevention and therapy

Area of Science:

• Gerontology
• Muscle Physiology
• Aging Research

Background:

• Sarcopenia, defined as age-related skeletal muscle mass loss, has been studied for two decades.
• Prevalence studies exist globally, but lack consistent outcome measures and diagnostic cut-off values.
• Current methods may use overly strict cut-offs, limiting clinical applicability.

Purpose of the Study:

• To review the current understanding of sarcopenia's definition, pathophysiology, and management.
• To highlight the limitations in current diagnostic approaches.
• To evaluate effective interventions for sarcopenia.

Main Methods:

• Review of existing literature on sarcopenia prevalence, pathophysiology, and interventions.
• Analysis of diagnostic criteria and their clinical utility.
• Evaluation of the efficacy of resistance training and pharmacological treatments.

Main Results:

• Inconsistent diagnostic criteria and cut-off values hinder sarcopenia diagnosis.
• Muscle performance assessment (grip strength, endurance) shows promise as a sensitive screening tool.
• Chronic low-grade inflammation is linked to sarcopenia, aggravated by aging, disuse, disease, and malnutrition.
• Intensive resistance training is the most effective intervention, yielding significant strength gains (>50%) in 6 weeks.
• Pharmacological interventions with anabolic effects show questionable efficacy and lack clear guidelines.

Conclusions:

• Standardized diagnostic criteria for sarcopenia are needed for better clinical practice.
• Muscle performance screening is a viable option for early detection.
• Resistance training is highly recommended for sarcopenia prevention and management in the elderly.
• Further research is needed to clarify the role and efficacy of pharmacological treatments.